<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2022-03-16T20:29:07.3117542+00:00 -->
<!-- Version            : 5.0.1.728 -->
<!-- Package ID         : 61d49518ad82476d8daf4bd0c661ca07 -->
<!-- Copyright (c) 2022 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
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    <link:label xml:lang="en-US" xlink:label="ater_LoansPayableGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loans payable gross.</link:label>
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    <link:loc xlink:href="ater-20211231.xsd#ater_DiscountAssociatedWithOriginalIssuanceOfLoan" xlink:type="locator" xlink:label="ater_DiscountAssociatedWithOriginalIssuanceOfLoan" />
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    <link:loc xlink:href="ater-20211231.xsd#ater_LongTermLoansRelatedToWarrant" xlink:type="locator" xlink:label="ater_LongTermLoansRelatedToWarrant" />
    <link:label xml:lang="en-US" xlink:label="ater_LongTermLoansRelatedToWarrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Long term loans related to warrant.</link:label>
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    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrialWarrant" xlink:type="locator" xlink:label="ater_HighTrialWarrant" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrialWarrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High trial warrant.</link:label>
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    <link:loc xlink:href="ater-20211231.xsd#ater_LossOnInitialIssuanceOfWarrant" xlink:type="locator" xlink:label="ater_LossOnInitialIssuanceOfWarrant" />
    <link:label xml:lang="en-US" xlink:label="ater_LossOnInitialIssuanceOfWarrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loss on initial issuance of warrant.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LossOnInitialIssuanceOfWarrant" xlink:to="ater_LossOnInitialIssuanceOfWarrant_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_IncomeTaxRateReconciliationPermanentDifferences" xlink:type="locator" xlink:label="ater_IncomeTaxRateReconciliationPermanentDifferences" />
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    <link:loc xlink:href="ater-20211231.xsd#ater_IncomeTaxRateReconciliationDebtExtinguishment" xlink:type="locator" xlink:label="ater_IncomeTaxRateReconciliationDebtExtinguishment" />
    <link:label xml:lang="en-US" xlink:label="ater_IncomeTaxRateReconciliationDebtExtinguishment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax rate reconciliation debt extinguishment.</link:label>
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    <link:loc xlink:href="ater-20211231.xsd#ater_IncomeTaxRateReconciliationWarrantLiabilities" xlink:type="locator" xlink:label="ater_IncomeTaxRateReconciliationWarrantLiabilities" />
    <link:label xml:lang="en-US" xlink:label="ater_IncomeTaxRateReconciliationWarrantLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax rate reconciliation warrant liabilities.</link:label>
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    <link:loc xlink:href="ater-20211231.xsd#ater_IncomeTaxRateReconciliationStockCompensation" xlink:type="locator" xlink:label="ater_IncomeTaxRateReconciliationStockCompensation" />
    <link:label xml:lang="en-US" xlink:label="ater_IncomeTaxRateReconciliationStockCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax rate reconciliation stock compensation.</link:label>
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    <link:loc xlink:href="ater-20211231.xsd#ater_IncomeTaxRateReconciliationChangeInFairValueContingentConsideration" xlink:type="locator" xlink:label="ater_IncomeTaxRateReconciliationChangeInFairValueContingentConsideration" />
    <link:label xml:lang="en-US" xlink:label="ater_IncomeTaxRateReconciliationChangeInFairValueContingentConsideration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax rate reconciliation change in fair value contingent consideration.</link:label>
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentFiscalYearFocus" xlink:type="locator" xlink:label="dei_DocumentFiscalYearFocus" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Year Focus</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentFiscalPeriodFocus" xlink:type="locator" xlink:label="dei_DocumentFiscalPeriodFocus" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Period Focus</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityCurrentReportingStatus" xlink:type="locator" xlink:label="dei_EntityCurrentReportingStatus" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Current Reporting Status</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityInteractiveDataCurrent" xlink:type="locator" xlink:label="dei_EntityInteractiveDataCurrent" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Interactive Data Current</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CurrentFiscalYearEndDate" xlink:type="locator" xlink:label="dei_CurrentFiscalYearEndDate" />
    <link:label xml:lang="en-US" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityFilerCategory" xlink:type="locator" xlink:label="dei_EntityFilerCategory" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityFilerCategory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Filer Category</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityFilerCategory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntitySmallBusiness" xlink:type="locator" xlink:label="dei_EntitySmallBusiness" />
    <link:label xml:lang="en-US" xlink:label="dei_EntitySmallBusiness_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Small Business</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntitySmallBusiness" xlink:to="dei_EntitySmallBusiness_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntitySmallBusiness_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Small Business</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityShellCompany" xlink:type="locator" xlink:label="dei_EntityShellCompany" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityShellCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Shell Company</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityShellCompany" xlink:to="dei_EntityShellCompany_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityShellCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityExTransitionPeriod" xlink:type="locator" xlink:label="dei_EntityExTransitionPeriod" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Ex Transition Period</link:label>
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityCommonStockSharesOutstanding" xlink:type="locator" xlink:label="dei_EntityCommonStockSharesOutstanding" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address Address Line1</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine2" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine2" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line Two</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine2" xlink:to="dei_EntityAddressAddressLine2_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address Address Line2</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address City Or Town</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, State or Province</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address State Or Province</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address Postal Zip Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber" />
    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation, State or Country Code</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation State Country Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentAnnualReport" xlink:type="locator" xlink:label="dei_DocumentAnnualReport" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentAnnualReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Annual Report</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentAnnualReport" xlink:to="dei_DocumentAnnualReport_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentAnnualReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Annual Report</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentTransitionReport" xlink:type="locator" xlink:label="dei_DocumentTransitionReport" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentTransitionReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Transition Report</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentTransitionReport" xlink:to="dei_DocumentTransitionReport_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentTransitionReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of each class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security12b Title</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol" />
    <link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol(s)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName" />
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Name of each exchange on which registered</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityVoluntaryFilers" xlink:type="locator" xlink:label="dei_EntityVoluntaryFilers" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityVoluntaryFilers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Voluntary Filers</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityVoluntaryFilers" xlink:to="dei_EntityVoluntaryFilers_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityVoluntaryFilers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Voluntary Filers</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:type="locator" xlink:label="dei_EntityWellKnownSeasonedIssuer" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Well-known Seasoned Issuer</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityWellKnownSeasonedIssuer" xlink:to="dei_EntityWellKnownSeasonedIssuer_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Well Known Seasoned Issuer</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityPublicFloat" xlink:type="locator" xlink:label="dei_EntityPublicFloat" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityPublicFloat_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Public Float</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityPublicFloat" xlink:to="dei_EntityPublicFloat_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityPublicFloat_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Public Float</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_IcfrAuditorAttestationFlag" xlink:type="locator" xlink:label="dei_IcfrAuditorAttestationFlag" />
    <link:label xml:lang="en-US" xlink:label="dei_IcfrAuditorAttestationFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ICFR Auditor Attestation Flag</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_IcfrAuditorAttestationFlag" xlink:to="dei_IcfrAuditorAttestationFlag_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_IcfrAuditorAttestationFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Icfr Auditor Attestation Flag</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AuditorName" xlink:type="locator" xlink:label="dei_AuditorName" />
    <link:label xml:lang="en-US" xlink:label="dei_AuditorName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AuditorName" xlink:to="dei_AuditorName_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_AuditorName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AuditorFirmId" xlink:type="locator" xlink:label="dei_AuditorFirmId" />
    <link:label xml:lang="en-US" xlink:label="dei_AuditorFirmId_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Firm ID</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AuditorFirmId" xlink:to="dei_AuditorFirmId_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_AuditorFirmId_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Firm Id</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AuditorLocation" xlink:type="locator" xlink:label="dei_AuditorLocation" />
    <link:label xml:lang="en-US" xlink:label="dei_AuditorLocation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Location</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AuditorLocation" xlink:to="dei_AuditorLocation_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_AuditorLocation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Location</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AccruedExpensesAndOtherLiabilitiesCurrent" xlink:type="locator" xlink:label="ater_AccruedExpensesAndOtherLiabilitiesCurrent" />
    <link:label xml:lang="en-US" xlink:label="ater_AccruedExpensesAndOtherLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued expenses and other liabilities current.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AccruedExpensesAndOtherLiabilitiesCurrent" xlink:to="ater_AccruedExpensesAndOtherLiabilitiesCurrent_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfFinancialPositionAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Of Financial Position [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementOfFinancialPositionAbstract_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsAbstract" xlink:type="locator" xlink:label="us-gaap_AssetsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASSETS</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:type="locator" xlink:label="us-gaap_AssetsCurrentAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CURRENT ASSETS:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Current [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Cash" xlink:type="locator" xlink:label="us-gaap_Cash" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Cash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Cash" xlink:to="us-gaap_Cash_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Cash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsReceivableNetCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable&#8212;net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableNetCurrent" xlink:to="us-gaap_AccountsReceivableNetCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable Net Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryNet" xlink:type="locator" xlink:label="us-gaap_InventoryNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InventoryNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryNet_lbl" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CURRENT LIABILITIES:</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LinesOfCreditCurrent" xlink:type="locator" xlink:label="us-gaap_LinesOfCreditCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LinesOfCreditCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit facility</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsPayableCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LoansPayableCurrent" xlink:type="locator" xlink:label="us-gaap_LoansPayableCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term loan</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Payable Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesPayableCurrent" xlink:type="locator" xlink:label="us-gaap_NotesPayableCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NotesPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Seller notes</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">STOCKHOLDERS&#8217; EQUITY:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:type="locator" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardDateAxis" xlink:type="locator" xlink:label="us-gaap_AwardDateAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardDateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardDateAxis" xlink:to="us-gaap_AwardDateAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardDateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Award Date [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardDateDomain" xlink:type="locator" xlink:label="us-gaap_AwardDateDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardDateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardDateDomain" xlink:to="us-gaap_AwardDateDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardDateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Award Date [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_MarchTwentyTwoThousandNineteenMember" xlink:type="locator" xlink:label="ater_MarchTwentyTwoThousandNineteenMember" />
    <link:label xml:lang="en-US" xlink:label="ater_MarchTwentyTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">March twenty two thousand nineteen.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_MarchTwentyTwoThousandNineteenMember" xlink:to="ater_MarchTwentyTwoThousandNineteenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_MarchTwentyTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">March 20, 2019</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_MarchTwentyTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">March Twenty Two Thousand Nineteen [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_MaySeventeenTwoThousandNineteenMember" xlink:type="locator" xlink:label="ater_MaySeventeenTwoThousandNineteenMember" />
    <link:label xml:lang="en-US" xlink:label="ater_MaySeventeenTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">May seventeen two thousand nineteen.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_MaySeventeenTwoThousandNineteenMember" xlink:to="ater_MaySeventeenTwoThousandNineteenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_MaySeventeenTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">May 17, 2019</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_MaySeventeenTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">May Seventeen Two Thousand Nineteen [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_JuneTwelveTwoThousandNineteenMember" xlink:type="locator" xlink:label="ater_JuneTwelveTwoThousandNineteenMember" />
    <link:label xml:lang="en-US" xlink:label="ater_JuneTwelveTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">June twelve two thousand nineteen.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_JuneTwelveTwoThousandNineteenMember" xlink:to="ater_JuneTwelveTwoThousandNineteenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_JuneTwelveTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">June 12, 2019</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_JuneTwelveTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">June Twelve Two Thousand Nineteen [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AugustTwoThousandNineteenMember" xlink:type="locator" xlink:label="ater_AugustTwoThousandNineteenMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AugustTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">August two thousand nineteen.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AugustTwoThousandNineteenMember" xlink:to="ater_AugustTwoThousandNineteenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AugustTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">August 2019</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AugustTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">August Two Thousand Nineteen [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_NovemberTwoThousandNineteenMember" xlink:type="locator" xlink:label="ater_NovemberTwoThousandNineteenMember" />
    <link:label xml:lang="en-US" xlink:label="ater_NovemberTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">November two thousand nineteen.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_NovemberTwoThousandNineteenMember" xlink:to="ater_NovemberTwoThousandNineteenMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_NovemberTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 2019</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_NovemberTwoThousandNineteenMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">November Two Thousand Nineteen [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_MarchTwelveTwoThousandTwentyMember" xlink:type="locator" xlink:label="ater_MarchTwelveTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="ater_MarchTwelveTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">March twelve two thousand twenty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_MarchTwelveTwoThousandTwentyMember" xlink:to="ater_MarchTwelveTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_MarchTwelveTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">March Twelve Two Thousand Twenty</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_MarchTwelveTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">March Twelve Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_JuneThirtyTwoThousandTwentyMember" xlink:type="locator" xlink:label="ater_JuneThirtyTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="ater_JuneThirtyTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">June thirty two thousand twenty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_JuneThirtyTwoThousandTwentyMember" xlink:to="ater_JuneThirtyTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_JuneThirtyTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">June 30, 2020</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_JuneThirtyTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">June Thirty Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_DecemberSeventeenTwoThousandTwentyMember" xlink:type="locator" xlink:label="ater_DecemberSeventeenTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="ater_DecemberSeventeenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">December seventeen two thousand twenty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DecemberSeventeenTwoThousandTwentyMember" xlink:to="ater_DecemberSeventeenTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_DecemberSeventeenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">December 17, 2020</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DecemberSeventeenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">December Seventeen Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_JulyThirteenTwoThousandTwentyMember" xlink:type="locator" xlink:label="ater_JulyThirteenTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="ater_JulyThirteenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">July thirteen two thousand twenty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_JulyThirteenTwoThousandTwentyMember" xlink:to="ater_JulyThirteenTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_JulyThirteenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">July 13, 2020</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_JulyThirteenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">July Thirteen Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_JulyTwentyTwoThousandTwentyMember" xlink:type="locator" xlink:label="ater_JulyTwentyTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="ater_JulyTwentyTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">July twenty two thousand twenty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_JulyTwentyTwoThousandTwentyMember" xlink:to="ater_JulyTwentyTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_JulyTwentyTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">July 20, 2020</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_JulyTwentyTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">July Twenty Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SeptemberThirtyTwoThousandTwentyMember" xlink:type="locator" xlink:label="ater_SeptemberThirtyTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SeptemberThirtyTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">September thirty two thousand twenty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SeptemberThirtyTwoThousandTwentyMember" xlink:to="ater_SeptemberThirtyTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SeptemberThirtyTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">September 30, 2020</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SeptemberThirtyTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">September Thirty Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AugustTenTwoThousandTwentyMember" xlink:type="locator" xlink:label="ater_AugustTenTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AugustTenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">August ten two thousand twenty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AugustTenTwoThousandTwentyMember" xlink:to="ater_AugustTenTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AugustTenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">August 10, 2020</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AugustTenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">August Ten Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_DecemberFourteenTwoThousandTwentyMember" xlink:type="locator" xlink:label="ater_DecemberFourteenTwoThousandTwentyMember" />
    <link:label xml:lang="en-US" xlink:label="ater_DecemberFourteenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">December fourteen two thousand twenty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DecemberFourteenTwoThousandTwentyMember" xlink:to="ater_DecemberFourteenTwoThousandTwentyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_DecemberFourteenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">December 14, 2020</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DecemberFourteenTwoThousandTwentyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">December Fourteen Two Thousand Twenty [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:type="locator" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SubsidiarySaleOfStockAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiary Sale Of Stock [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="locator" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Name Of Transaction [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_FollowOnPublicOfferingMember" xlink:type="locator" xlink:label="ater_FollowOnPublicOfferingMember" />
    <link:label xml:lang="en-US" xlink:label="ater_FollowOnPublicOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Follow-on public offering.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_FollowOnPublicOfferingMember" xlink:to="ater_FollowOnPublicOfferingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_FollowOnPublicOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Follow-on Public Offering</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_FollowOnPublicOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Follow On Public Offering [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:type="locator" xlink:label="us-gaap_TypeOfArrangementAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangement and Arrangement Other than Collaborative</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_TypeOfArrangementAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Type Of Arrangement [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:type="locator" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangement and Arrangement Other than Collaborative</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Arrangements And Nonarrangement Transactions [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AssetPurchaseAgreementMember" xlink:type="locator" xlink:label="ater_AssetPurchaseAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AssetPurchaseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Asset purchase agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AssetPurchaseAgreementMember" xlink:to="ater_AssetPurchaseAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AssetPurchaseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Purchase Agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AssetPurchaseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Asset Purchase Agreement [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailMember" xlink:type="locator" xlink:label="ater_HighTrailMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High Trail.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailMember" xlink:to="ater_HighTrailMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems" xlink:type="locator" xlink:label="us-gaap_StatementLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of restricted common stock</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Restricted Stock Award Gross</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of restricted common stock, shares</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Restricted Stock Award Gross</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Restricted Stock Award Forfeitures</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forfeiture of restricted common stock, shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited" xlink:to="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Restricted Stock Award Forfeited</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of 25,000 warrants on August 18, 2020</link:label>
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    <link:label xml:lang="en-US" xlink:label="ater_StockIssuedDuringPeriodValueCommonStockUponExerciseOfStockOptionGrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Common Stock Upon Exercise Of Stock Option Grants</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_StockIssuedDuringPeriodSharesCommonStockUponExerciseOfStockOptionGrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon exercise of stock option grants, shares</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_StockIssuedDuringPeriodSharesCommonStockUponExerciseOfStockOptionGrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Common Stock Upon Exercise Of Stock Option Grants</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_StockIssuedDuringPeriodValueWarrantsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock related to exercise of warrants</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_StockIssuedDuringPeriodValueWarrantsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Warrants Exercised</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_StockIssuedDuringPeriodShareWarrantsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock related to exercise of warrants, shares</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_StockIssuedDuringPeriodShareWarrantsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Share Warrants Exercised</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueAcquisitions" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueAcquisitions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock in connection with acquisition of Healing Solutions assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueAcquisitions" xlink:to="us-gaap_StockIssuedDuringPeriodValueAcquisitions_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueAcquisitions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Acquisitions</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesAcquisitions" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesAcquisitions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock in connection with acquisition of Healing Solutions assets, shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:to="us-gaap_StockIssuedDuringPeriodSharesAcquisitions_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesAcquisitions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Acquisitions</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IssuanceOfRestrictedStockAwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of restricted stock awards</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IssuanceOfRestrictedStockAwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Restricted Stock Awards</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IssuanceOfRestrictedStockAwardsShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of restricted stock awards, shares</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IssuanceOfRestrictedStockAwardsShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Restricted Stock Awards Shares</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IssuanceOfWarrantsToHighTrailValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of warrants to High Trail</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IssuanceOfWarrantsToHighTrailValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Warrants To High Trail Value</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IssuanceOfWarrantsToMidcap_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of warrants to Midcap</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IssuanceOfWarrantsToMidcap_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Warrants To Midcap</link:label>
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    <link:label xml:lang="en-US" xlink:label="ater_ReclassificationOfWarrantsToLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification Of Warrants To Liability</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_FairValueOfWarrantModificationOnExtinguishment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant modification on extinguishment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_FairValueOfWarrantModificationOnExtinguishment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Of Warrant Modification On Extinguishment</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock, shares</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares New Issues</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" />
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    <link:label xml:lang="en-US" xlink:label="ater_NumberOfWarrantsIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of warrants issued.</link:label>
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    <link:label xml:lang="en-US" xlink:label="ater_ProvisionForSalesReturns_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Provision for sales returns.</link:label>
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    <link:loc xlink:href="ater-20211231.xsd#ater_AmortizationOfDeferredFinancingCostsAndDebtDiscounts" xlink:type="locator" xlink:label="ater_AmortizationOfDeferredFinancingCostsAndDebtDiscounts" />
    <link:label xml:lang="en-US" xlink:label="ater_AmortizationOfDeferredFinancingCostsAndDebtDiscounts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Amortization of deferred financing cost and debt discounts.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AmortizationOfDeferredFinancingCostsAndDebtDiscounts" xlink:to="ater_AmortizationOfDeferredFinancingCostsAndDebtDiscounts_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_GainLossInConnectionWithSettlementOfEarnout" xlink:type="locator" xlink:label="ater_GainLossInConnectionWithSettlementOfEarnout" />
    <link:label xml:lang="en-US" xlink:label="ater_GainLossInConnectionWithSettlementOfEarnout_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain (loss) in connection with settlement of earnout.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_GainLossInConnectionWithSettlementOfEarnout" xlink:to="ater_GainLossInConnectionWithSettlementOfEarnout_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_ProvisionForBarterCredits" xlink:type="locator" xlink:label="ater_ProvisionForBarterCredits" />
    <link:label xml:lang="en-US" xlink:label="ater_ProvisionForBarterCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Provision for barter credits.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ProvisionForBarterCredits" xlink:to="ater_ProvisionForBarterCredits_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_LossFromDerivativeLiabilityDiscountRelatedToTermLoan" xlink:type="locator" xlink:label="ater_LossFromDerivativeLiabilityDiscountRelatedToTermLoan" />
    <link:label xml:lang="en-US" xlink:label="ater_LossFromDerivativeLiabilityDiscountRelatedToTermLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loss from derivative liability discount related to term loan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LossFromDerivativeLiabilityDiscountRelatedToTermLoan" xlink:to="ater_LossFromDerivativeLiabilityDiscountRelatedToTermLoan_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_AllowanceForDoubtfulAccountsAndOther" xlink:type="locator" xlink:label="ater_AllowanceForDoubtfulAccountsAndOther" />
    <link:label xml:lang="en-US" xlink:label="ater_AllowanceForDoubtfulAccountsAndOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for doubtful accounts and other.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AllowanceForDoubtfulAccountsAndOther" xlink:to="ater_AllowanceForDoubtfulAccountsAndOther_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_IncreaseDecreaseInAccountsPayableAccruedAndOtherLiabilities" xlink:type="locator" xlink:label="ater_IncreaseDecreaseInAccountsPayableAccruedAndOtherLiabilities" />
    <link:label xml:lang="en-US" xlink:label="ater_IncreaseDecreaseInAccountsPayableAccruedAndOtherLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase decrease in accounts payable accrued and other liabilities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_IncreaseDecreaseInAccountsPayableAccruedAndOtherLiabilities" xlink:to="ater_IncreaseDecreaseInAccountsPayableAccruedAndOtherLiabilities_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_ProceedsFromCancellationOfWarrant" xlink:type="locator" xlink:label="ater_ProceedsFromCancellationOfWarrant" />
    <link:label xml:lang="en-US" xlink:label="ater_ProceedsFromCancellationOfWarrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from cancellation of warrant.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ProceedsFromCancellationOfWarrant" xlink:to="ater_ProceedsFromCancellationOfWarrant_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_ProceedsFromIssuanceOfCommonStockFollowOnPublicOfferingNetOfIssuanceCosts" xlink:type="locator" xlink:label="ater_ProceedsFromIssuanceOfCommonStockFollowOnPublicOfferingNetOfIssuanceCosts" />
    <link:label xml:lang="en-US" xlink:label="ater_ProceedsFromIssuanceOfCommonStockFollowOnPublicOfferingNetOfIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of common stock follow on public offering net of issuance costs.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ProceedsFromIssuanceOfCommonStockFollowOnPublicOfferingNetOfIssuanceCosts" xlink:to="ater_ProceedsFromIssuanceOfCommonStockFollowOnPublicOfferingNetOfIssuanceCosts_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_ProceedsFromPaymentsForStockOptionsExercised" xlink:type="locator" xlink:label="ater_ProceedsFromPaymentsForStockOptionsExercised" />
    <link:label xml:lang="en-US" xlink:label="ater_ProceedsFromPaymentsForStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from payments for stock options exercised.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ProceedsFromPaymentsForStockOptionsExercised" xlink:to="ater_ProceedsFromPaymentsForStockOptionsExercised_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_ProceedsFromInsuranceFinancingActivities" xlink:type="locator" xlink:label="ater_ProceedsFromInsuranceFinancingActivities" />
    <link:label xml:lang="en-US" xlink:label="ater_ProceedsFromInsuranceFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Insurance financing proceeds.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ProceedsFromInsuranceFinancingActivities" xlink:to="ater_ProceedsFromInsuranceFinancingActivities_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_PaymentsOfInsuranceObligationFinancingActivities" xlink:type="locator" xlink:label="ater_PaymentsOfInsuranceObligationFinancingActivities" />
    <link:label xml:lang="en-US" xlink:label="ater_PaymentsOfInsuranceObligationFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Insurance obligation payments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PaymentsOfInsuranceObligationFinancingActivities" xlink:to="ater_PaymentsOfInsuranceObligationFinancingActivities_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Of Cash Flows [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionAxis" xlink:to="us-gaap_BusinessAcquisitionAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition, Acquiree</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionAcquireeDomain" xlink:to="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Acquiree [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_TruweoAssetsOneMember" xlink:type="locator" xlink:label="ater_TruweoAssetsOneMember" />
    <link:label xml:lang="en-US" xlink:label="ater_TruweoAssetsOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Truweo assets one.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_TruweoAssetsOneMember" xlink:to="ater_TruweoAssetsOneMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_TruweoAssetsOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Truweo Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_TruweoAssetsOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Truweo Assets One [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SmashAssetsMember" xlink:type="locator" xlink:label="ater_SmashAssetsMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SmashAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Smash assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SmashAssetsMember" xlink:to="ater_SmashAssetsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SmashAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Smash Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SmashAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Smash Assets [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_TruweoAssetsMember" xlink:type="locator" xlink:label="ater_TruweoAssetsMember" />
    <link:label xml:lang="en-US" xlink:label="ater_TruweoAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Truweo assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_TruweoAssetsMember" xlink:to="ater_TruweoAssetsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_TruweoAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Truweo Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_TruweoAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Truweo Assets [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HealingSolutionsLLCMember" xlink:type="locator" xlink:label="ater_HealingSolutionsLLCMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HealingSolutionsLLCMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Healing solutions, llc.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HealingSolutionsLLCMember" xlink:to="ater_HealingSolutionsLLCMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HealingSolutionsLLCMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Healing Solutions LLC</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HealingSolutionsLLCMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Healing Solutions L L C [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_PhotoPaperDirectLTDMember" xlink:type="locator" xlink:label="ater_PhotoPaperDirectLTDMember" />
    <link:label xml:lang="en-US" xlink:label="ater_PhotoPaperDirectLTDMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Photo Paper Direct Ltd.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PhotoPaperDirectLTDMember" xlink:to="ater_PhotoPaperDirectLTDMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_PhotoPaperDirectLTDMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Photo Paper Direct Ltd.</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PhotoPaperDirectLTDMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Photo Paper Direct L T D [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AussieHealthMember" xlink:type="locator" xlink:label="ater_AussieHealthMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AussieHealthMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Aussie Health.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AussieHealthMember" xlink:to="ater_AussieHealthMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AussieHealthMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aussie Health</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AussieHealthMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Aussie Health [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SquattyPottyLLCMember" xlink:type="locator" xlink:label="ater_SquattyPottyLLCMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SquattyPottyLLCMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Squatty Potty, LLC.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SquattyPottyLLCMember" xlink:to="ater_SquattyPottyLLCMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SquattyPottyLLCMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Squatty Potty, LLC</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SquattyPottyLLCMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Squatty Potty L L C [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SmashMember" xlink:type="locator" xlink:label="ater_SmashMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SmashMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Smash.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SmashMember" xlink:to="ater_SmashMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SmashMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Smash</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SmashMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Smash [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:type="locator" xlink:label="us-gaap_CreditFacilityAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:type="locator" xlink:label="us-gaap_CreditFacilityDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="us-gaap_CreditFacilityDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:type="locator" xlink:label="us-gaap_RevolvingCreditFacilityMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving Credit Facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevolvingCreditFacilityMember" xlink:to="us-gaap_RevolvingCreditFacilityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revolving Credit Facility [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_MidCapCreditFacilityMember" xlink:type="locator" xlink:label="ater_MidCapCreditFacilityMember" />
    <link:label xml:lang="en-US" xlink:label="ater_MidCapCreditFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Mid Cap credit facility.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_MidCapCreditFacilityMember" xlink:to="ater_MidCapCreditFacilityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_MidCapCreditFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">MidCap Credit Facility</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_MidCapCreditFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Mid Cap Credit Facility [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="us-gaap_DebtInstrumentNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Name [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HorizonTermLoanMember" xlink:type="locator" xlink:label="ater_HorizonTermLoanMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HorizonTermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Horizon term loan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HorizonTermLoanMember" xlink:to="ater_HorizonTermLoanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HorizonTermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Horizon Term Loan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HorizonTermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Horizon Term Loan [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailDecember2020NoteAndFebruary2021TermLoanMember" xlink:type="locator" xlink:label="ater_HighTrailDecember2020NoteAndFebruary2021TermLoanMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDecember2020NoteAndFebruary2021TermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High Trail December 2020 note and February 2021 term loan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailDecember2020NoteAndFebruary2021TermLoanMember" xlink:to="ater_HighTrailDecember2020NoteAndFebruary2021TermLoanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDecember2020NoteAndFebruary2021TermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail December 2020 Note and February 2021 Term Loan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDecember2020NoteAndFebruary2021TermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail December2020 Note And February2021 Term Loan [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailApril2021TermLoanMember" xlink:type="locator" xlink:label="ater_HighTrailApril2021TermLoanMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailApril2021TermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High trail April 2021 term loan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailApril2021TermLoanMember" xlink:to="ater_HighTrailApril2021TermLoanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailApril2021TermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail April 2021 Term Loan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailApril2021TermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail April2021 Term Loan [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailTermLoanMember" xlink:type="locator" xlink:label="ater_HighTrailTermLoanMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailTermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High trail term loan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailTermLoanMember" xlink:to="ater_HighTrailTermLoanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailTermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trails Term Loan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailTermLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail Term Loan [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailDecember2020NoteAndFebruary2021NoteMember" xlink:type="locator" xlink:label="ater_HighTrailDecember2020NoteAndFebruary2021NoteMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDecember2020NoteAndFebruary2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High Trail December 2020 Note and February 2021 Note member.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailDecember2020NoteAndFebruary2021NoteMember" xlink:to="ater_HighTrailDecember2020NoteAndFebruary2021NoteMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDecember2020NoteAndFebruary2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail December2020 Note And February2021 Note</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDecember2020NoteAndFebruary2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail December2020 Note And February2021 Note [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailApril2021NoteMember" xlink:type="locator" xlink:label="ater_HighTrailApril2021NoteMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailApril2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High Trail April 2021 Note.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailApril2021NoteMember" xlink:to="ater_HighTrailApril2021NoteMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailApril2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail April2021 Note</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailApril2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail April2021 Note [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailDecember2021NoteMember" xlink:type="locator" xlink:label="ater_HighTrailDecember2021NoteMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDecember2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High Trail December 2021 note.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailDecember2021NoteMember" xlink:to="ater_HighTrailDecember2021NoteMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDecember2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail December2021 Note</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDecember2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail December2021 Note [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailFebruary2021NoteMember" xlink:type="locator" xlink:label="ater_HighTrailFebruary2021NoteMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailFebruary2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High trail February 2021 note.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailFebruary2021NoteMember" xlink:to="ater_HighTrailFebruary2021NoteMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailFebruary2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail February 2021 Note</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailFebruary2021NoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail February2021 Note [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">OPERATING ACTIVITIES:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss" xlink:type="locator" xlink:label="us-gaap_ProfitLoss" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProfitLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProfitLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Profit Loss</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net loss to net cash (used in) provided by operating activities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:type="locator" xlink:label="us-gaap_DepreciationAndAmortization" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationAndAmortization" xlink:to="us-gaap_DepreciationAndAmortization_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation And Amortization</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ProvisionForSalesReturns_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for sales returns</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ProvisionForSalesReturns_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Provision For Sales Returns</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AmortizationOfDeferredFinancingCostsAndDebtDiscounts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of deferred financing cost and debt discounts</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AmortizationOfDeferredFinancingCostsAndDebtDiscounts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Deferred Financing Costs And Debt Discounts</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_GainLossInConnectionWithSettlementOfEarnout_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss in connection with settlement of earn-out</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_GainLossInConnectionWithSettlementOfEarnout_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss In Connection With Settlement Of Earnout</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loss in connection with the change in warrant fair value</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LossOnInitialIssuanceOfWarrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loss on initial issuance of warrants</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Loss on extinguishment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ProvisionForBarterCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for barter credits</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ProvisionForBarterCredits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Provision For Barter Credits</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LossFromDerivativeLiabilityDiscountRelatedToTermLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss from derivative liability discount related to term loan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LossFromDerivativeLiabilityDiscountRelatedToTermLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss From Derivative Liability Discount Related To Term Loan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AllowanceForDoubtfulAccountsAndOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance for doubtful accounts and other</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AllowanceForDoubtfulAccountsAndOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Doubtful Accounts And Other</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in assets and liabilities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Operating Capital [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Accounts Receivable</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInInventories" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Inventory</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInInventories" xlink:to="us-gaap_IncreaseDecreaseInInventories_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Inventories</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepaid and other current assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Prepaid Deferred Expense And Other Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IncreaseDecreaseInAccountsPayableAccruedAndOtherLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable, accrued and other liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IncreaseDecreaseInAccountsPayableAccruedAndOtherLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Accounts Payable Accrued And Other Liabilities</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash provided (used) by operating activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">INVESTING ACTIVITIES:</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireBusinessTwoNetOfCashAcquired" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireBusinessTwoNetOfCashAcquired" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Financing Activities [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:type="locator" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromWarrantExercises" xlink:type="locator" xlink:label="us-gaap_ProceedsFromWarrantExercises" />
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    <link:label xml:lang="en-US" xlink:label="ater_ProceedsFromCancellationOfWarrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from cancellation of warrant</link:label>
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    <link:label xml:lang="en-US" xlink:label="ater_ProceedsFromIssuanceOfCommonStockFollowOnPublicOfferingNetOfIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock from follow-on public offering, net of issuance costs</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ProceedsFromIssuanceOfCommonStockFollowOnPublicOfferingNetOfIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Common Stock Follow On Public Offering Net Of Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ProceedsFromPaymentsForStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from exercise of stock options</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities" xlink:type="locator" xlink:label="us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit" xlink:type="locator" xlink:label="us-gaap_ProceedsFromLinesOfCredit" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:type="locator" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_GoodwillPolicyTextBlock" xlink:to="ater_GoodwillPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_GoodwillPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_GoodwillPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Policy [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsFiniteLivedPolicy" xlink:type="locator" xlink:label="us-gaap_IntangibleAssetsFiniteLivedPolicy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsFiniteLivedPolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible Assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntangibleAssetsFiniteLivedPolicy" xlink:to="us-gaap_IntangibleAssetsFiniteLivedPolicy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsFiniteLivedPolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets Finite Lived Policy</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationsPolicy" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationsPolicy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationsPolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Combinations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationsPolicy" xlink:to="us-gaap_BusinessCombinationsPolicy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationsPolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combinations Policy</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AccountingAndContingentConsiderationPolicyTextBlock" xlink:type="locator" xlink:label="ater_AccountingAndContingentConsiderationPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="ater_AccountingAndContingentConsiderationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accounting and contingent consideration.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AccountingAndContingentConsiderationPolicyTextBlock" xlink:to="ater_AccountingAndContingentConsiderationPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AccountingAndContingentConsiderationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting and Contingent Consideration</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AccountingAndContingentConsiderationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounting And Contingent Consideration Policy [Text Block]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_InventoriesAndCostOfGoodsSoldPolicyTextBlock" xlink:type="locator" xlink:label="ater_InventoriesAndCostOfGoodsSoldPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="ater_InventoriesAndCostOfGoodsSoldPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Inventories and cost of goods sold.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_InventoriesAndCostOfGoodsSoldPolicyTextBlock" xlink:to="ater_InventoriesAndCostOfGoodsSoldPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_InventoriesAndCostOfGoodsSoldPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory and Cost of Goods Sold</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_InventoriesAndCostOfGoodsSoldPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Inventories And Cost Of Goods Sold Policy [Text Block]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SalesAndDistributionPolicyTextBlock" xlink:type="locator" xlink:label="ater_SalesAndDistributionPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="ater_SalesAndDistributionPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales and distribution.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SalesAndDistributionPolicyTextBlock" xlink:to="ater_SalesAndDistributionPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SalesAndDistributionPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales and Distribution</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SalesAndDistributionPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sales And Distribution Policy [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:to="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Research And Development Expense Policy</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and Administrative</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Selling General And Administrative Expenses Policy [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CompensationRelatedCostsPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_CompensationRelatedCostsPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CompensationRelatedCostsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-Based Compensation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CompensationRelatedCostsPolicyTextBlock" xlink:to="us-gaap_CompensationRelatedCostsPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CompensationRelatedCostsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Compensation Related Costs Policy [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign Currency</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:to="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Currency Transactions And Translations Policy [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Loss Per Share</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerSharePolicyTextBlock" xlink:to="us-gaap_EarningsPerSharePolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share Policy [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Information</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:to="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Policy Policy [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recent Accounting Pronouncements</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements Policy Policy [Text Block]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_EstimatedUsefulLivesOfPropertyAndEquipmentTableTextBlock" xlink:type="locator" xlink:label="ater_EstimatedUsefulLivesOfPropertyAndEquipmentTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="ater_EstimatedUsefulLivesOfPropertyAndEquipmentTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated useful lives of property and equipment.</link:label>
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    <link:label xml:lang="en-US" xlink:label="ater_EstimatedUsefulLivesOfPropertyAndEquipmentTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Estimated Useful Lives of Property and Equipment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_EstimatedUsefulLivesOfPropertyAndEquipmentTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Useful Lives Of Property And Equipment Table [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Revenue Disaggregated by Sales Channel and Geographic Region</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock" xlink:to="us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Entity Wide Information Revenue From External Customers By Products And Services [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Inventory</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:to="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Inventory Current Table [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Accounts Receivable</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Accounts Notes Loans And Financing Receivable [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment [Text Block]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" />
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    <link:loc xlink:href="ater-20211231.xsd#ater_ScheduleOfPrepaidAndOtherCurrentAssetsTableTextBlock" xlink:type="locator" xlink:label="ater_ScheduleOfPrepaidAndOtherCurrentAssetsTableTextBlock" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Scheduleof Finite Lived Intangible Assets Future Amortization Expense Table [Text Block]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SubstantialDoubtAboutGoingConcernCashAndCashEquivalents" xlink:type="locator" xlink:label="ater_SubstantialDoubtAboutGoingConcernCashAndCashEquivalents" />
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernCashAndCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Substantial doubt about going concern cash and cash equivalents.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SubstantialDoubtAboutGoingConcernCashAndCashEquivalents" xlink:to="ater_SubstantialDoubtAboutGoingConcernCashAndCashEquivalents_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_SubstantialDoubtAboutGoingConcernAccumulatedDeficit" xlink:type="locator" xlink:label="ater_SubstantialDoubtAboutGoingConcernAccumulatedDeficit" />
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Substantial doubt about going concern accumulated deficit.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SubstantialDoubtAboutGoingConcernAccumulatedDeficit" xlink:to="ater_SubstantialDoubtAboutGoingConcernAccumulatedDeficit_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_SubstantialDoubtAboutGoingConcernNetLoss" xlink:type="locator" xlink:label="ater_SubstantialDoubtAboutGoingConcernNetLoss" />
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernNetLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Substantial doubt about going concern net loss.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SubstantialDoubtAboutGoingConcernNetLoss" xlink:to="ater_SubstantialDoubtAboutGoingConcernNetLoss_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_SubstantialDoubtAboutGoingConcernNetCashUsedInOperatingActivities" xlink:type="locator" xlink:label="ater_SubstantialDoubtAboutGoingConcernNetCashUsedInOperatingActivities" />
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernNetCashUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Substantial doubt about going concern net cash used in operating activities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SubstantialDoubtAboutGoingConcernNetCashUsedInOperatingActivities" xlink:to="ater_SubstantialDoubtAboutGoingConcernNetCashUsedInOperatingActivities_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_OrganizationAndDescriptionOfBusinessLineItems" xlink:type="locator" xlink:label="ater_OrganizationAndDescriptionOfBusinessLineItems" />
    <link:label xml:lang="en-US" xlink:label="ater_OrganizationAndDescriptionOfBusinessLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Organization and description of business.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_OrganizationAndDescriptionOfBusinessLineItems" xlink:to="ater_OrganizationAndDescriptionOfBusinessLineItems_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_OrganizationAndDescriptionOfBusinessTable" xlink:type="locator" xlink:label="ater_OrganizationAndDescriptionOfBusinessTable" />
    <link:label xml:lang="en-US" xlink:label="ater_OrganizationAndDescriptionOfBusinessTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Organization and description of business.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_OrganizationAndDescriptionOfBusinessTable" xlink:to="ater_OrganizationAndDescriptionOfBusinessTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_OrganizationAndDescriptionOfBusinessTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization And Description Of Business [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OrganizationAndDescriptionOfBusinessTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Organization And Description Of Business [Table]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AssetBackedCreditAgreementMember" xlink:type="locator" xlink:label="ater_AssetBackedCreditAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AssetBackedCreditAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Asset backed credit agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AssetBackedCreditAgreementMember" xlink:to="ater_AssetBackedCreditAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AssetBackedCreditAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Backed Credit Agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AssetBackedCreditAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Asset Backed Credit Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OrganizationAndDescriptionOfBusinessLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization And Description Of Business [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OrganizationAndDescriptionOfBusinessLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Organization And Description Of Business [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernCashAndCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Going concern, cash and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernCashAndCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Substantial Doubt About Going Concern Cash And Cash Equivalents</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Going concern, accumulated deficit</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Substantial Doubt About Going Concern Accumulated Deficit</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernNetLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Going concern, net loss</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernNetLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Substantial Doubt About Going Concern Net Loss</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernNetCashUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Going concern, net cash used in operating activities</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SubstantialDoubtAboutGoingConcernNetCashUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Substantial Doubt About Going Concern Net Cash Used In Operating Activities</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_LineOfCreditFacilityMaximumLiquidityRequirementsDuringPeriod" xlink:type="locator" xlink:label="ater_LineOfCreditFacilityMaximumLiquidityRequirementsDuringPeriod" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMaximumLiquidityRequirementsDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility, maximum liquidity requirements during period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LineOfCreditFacilityMaximumLiquidityRequirementsDuringPeriod" xlink:to="ater_LineOfCreditFacilityMaximumLiquidityRequirementsDuringPeriod_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_LineOfCreditFacilityMaximumLiquidityRequirementsAtAllOtherTimes" xlink:type="locator" xlink:label="ater_LineOfCreditFacilityMaximumLiquidityRequirementsAtAllOtherTimes" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMaximumLiquidityRequirementsAtAllOtherTimes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility, maximum liquidity requirements at all other times.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LineOfCreditFacilityMaximumLiquidityRequirementsAtAllOtherTimes" xlink:to="ater_LineOfCreditFacilityMaximumLiquidityRequirementsAtAllOtherTimes_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount" xlink:type="locator" xlink:label="ater_LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility maximum future increase borrowing capacity amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount" xlink:to="ater_LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_LineOfCreditFacilityMinimumBorrowingCapacity" xlink:type="locator" xlink:label="ater_LineOfCreditFacilityMinimumBorrowingCapacity" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMinimumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility minimum borrowing capacity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LineOfCreditFacilityMinimumBorrowingCapacity" xlink:to="ater_LineOfCreditFacilityMinimumBorrowingCapacity_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional increase in borrowing amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Maximum Future Increase Borrowing Capacity Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMaximumLiquidityRequirementsDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility, maximum liquidity requirements during the period</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMaximumLiquidityRequirementsDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Maximum Liquidity Requirements During Period</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMaximumLiquidityRequirementsAtAllOtherTimes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility, maximum liquidity requirements at all other times</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMaximumLiquidityRequirementsAtAllOtherTimes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Maximum Liquidity Requirements At All Other Times</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityCovenantTerms" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility, covenant terms</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityCovenantTerms" xlink:to="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Covenant Terms</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMinimumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility, minimum borrowing</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityMinimumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Minimum Borrowing Capacity</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SignificantAccountingPoliciesLineItems" xlink:type="locator" xlink:label="ater_SignificantAccountingPoliciesLineItems" />
    <link:label xml:lang="en-US" xlink:label="ater_SignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Significant Accounting Policies.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SignificantAccountingPoliciesLineItems" xlink:to="ater_SignificantAccountingPoliciesLineItems_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_SignificantAccountingPoliciesTable" xlink:type="locator" xlink:label="ater_SignificantAccountingPoliciesTable" />
    <link:label xml:lang="en-US" xlink:label="ater_SignificantAccountingPoliciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Significant Accounting Policies Table</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SignificantAccountingPoliciesTable" xlink:to="ater_SignificantAccountingPoliciesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SignificantAccountingPoliciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Accounting Policies [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SignificantAccountingPoliciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:type="locator" xlink:label="us-gaap_BalanceSheetLocationAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Balance Sheet Location [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:type="locator" xlink:label="us-gaap_BalanceSheetLocationDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_BalanceSheetLocationDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Balance Sheet Location [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNoncurrentAssetsMember" xlink:type="locator" xlink:label="us-gaap_OtherNoncurrentAssetsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherNoncurrentAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Noncurrent Assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNoncurrentAssetsMember" xlink:to="us-gaap_OtherNoncurrentAssetsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherNoncurrentAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Noncurrent Assets [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember" xlink:type="locator" xlink:label="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid Expenses and Other Current Assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember" xlink:to="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expenses And Other Current Assets [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_ShortTermDebtTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeAxis" xlink:to="us-gaap_ShortTermDebtTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Debt Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_ShortTermDebtTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeDomain" xlink:to="us-gaap_ShortTermDebtTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Debt Type [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:type="locator" xlink:label="us-gaap_LetterOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letter of Credit</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LetterOfCreditMember" xlink:to="us-gaap_LetterOfCreditMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Letter Of Credit [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskByTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskByTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk By Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskTypeDomain" xlink:to="us-gaap_ConcentrationRiskTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CustomerConcentrationRiskMember" xlink:type="locator" xlink:label="us-gaap_CustomerConcentrationRiskMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Concentration Risk</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CustomerConcentrationRiskMember" xlink:to="us-gaap_CustomerConcentrationRiskMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Customer Concentration Risk [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk By Benchmark [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskBenchmarkDomain" xlink:to="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesRevenueNetMember" xlink:type="locator" xlink:label="us-gaap_SalesRevenueNetMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Benchmark</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SalesRevenueNetMember" xlink:to="us-gaap_SalesRevenueNetMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sales Revenue Net [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableMember" xlink:type="locator" xlink:label="us-gaap_AccountsReceivableMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableMember" xlink:to="us-gaap_AccountsReceivableMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis" xlink:type="locator" xlink:label="srt_MajorCustomersAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_MajorCustomersAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MajorCustomersAxis" xlink:to="srt_MajorCustomersAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MajorCustomersAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Major Customers [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:type="locator" xlink:label="srt_NameOfMajorCustomerDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_NameOfMajorCustomerDomain" xlink:to="srt_NameOfMajorCustomerDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Name Of Major Customer [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AmazonMember" xlink:type="locator" xlink:label="ater_AmazonMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AmazonMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Amazon.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AmazonMember" xlink:to="ater_AmazonMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AmazonMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amazon</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AmazonMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amazon [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AccruedLiabilityMember" xlink:type="locator" xlink:label="ater_AccruedLiabilityMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AccruedLiabilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued Liability.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AccruedLiabilityMember" xlink:to="ater_AccruedLiabilityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AccruedLiabilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AccruedLiabilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liability [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:type="locator" xlink:label="us-gaap_IncomeStatementLocationAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Statement Location</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement Location [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:type="locator" xlink:label="us-gaap_IncomeStatementLocationDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Statement Location</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_IncomeStatementLocationDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement Location [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SellingAndMarketingExpenseMember" xlink:type="locator" xlink:label="us-gaap_SellingAndMarketingExpenseMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SellingAndMarketingExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales and distribution expenses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingAndMarketingExpenseMember" xlink:to="us-gaap_SellingAndMarketingExpenseMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SellingAndMarketingExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Selling And Marketing Expense [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis" xlink:type="locator" xlink:label="srt_RangeAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeMember" xlink:to="srt_RangeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember" xlink:type="locator" xlink:label="srt_MaximumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseMember" xlink:type="locator" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Expense, Net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpenseMember" xlink:to="us-gaap_OtherNonoperatingIncomeExpenseMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income Expense [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember" xlink:type="locator" xlink:label="us-gaap_SubsequentEventMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Accounting Policies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SecurityDeposit" xlink:type="locator" xlink:label="us-gaap_SecurityDeposit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecurityDeposit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash deposit associated with credit facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecurityDeposit" xlink:to="us-gaap_SecurityDeposit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecurityDeposit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security Deposit</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EscrowDeposit" xlink:type="locator" xlink:label="us-gaap_EscrowDeposit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EscrowDeposit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Returned deposit for inventory to pay into an escrow account</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EscrowDeposit" xlink:to="us-gaap_EscrowDeposit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EscrowDeposit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Escrow Deposit</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:type="locator" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance for doubtful accounts</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Doubtful Accounts Receivable</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_NumberOfCustomerAccountedForTenPercentOrMoreOfRevenue" xlink:type="locator" xlink:label="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfRevenue" />
    <link:label xml:lang="en-US" xlink:label="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number Of Customer Accounted For Ten Percent Or More Of Revenue</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfRevenue" xlink:to="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfRevenue_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_NumberOfCustomerAccountedForTenPercentOrMoreOfAccountsReceivable" xlink:type="locator" xlink:label="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfAccountsReceivable" />
    <link:label xml:lang="en-US" xlink:label="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of customer accounted for ten percent or more of accounts receivable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfAccountsReceivable" xlink:to="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfAccountsReceivable_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of customer accounted</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Customer Accounted For Ten Percent Or More Of Revenue</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of customer accounted</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Customer Accounted For Ten Percent Or More Of Accounts Receivable</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskPercentage1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of concentration of credit risk</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskPercentage1" xlink:to="us-gaap_ConcentrationRiskPercentage1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Percentage1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Property Plant And Equipment [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:to="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Property Plant And Equipment [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment By Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Type [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ComputerEquipmentAndSoftwareMember" xlink:type="locator" xlink:label="ater_ComputerEquipmentAndSoftwareMember" />
    <link:label xml:lang="en-US" xlink:label="ater_ComputerEquipmentAndSoftwareMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Computer equipment and software.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ComputerEquipmentAndSoftwareMember" xlink:to="ater_ComputerEquipmentAndSoftwareMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ComputerEquipmentAndSoftwareMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Computer Equipment and Software</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ComputerEquipmentAndSoftwareMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Computer Equipment And Software [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_FurnitureFixtureAndEquipmentMember" xlink:type="locator" xlink:label="ater_FurnitureFixtureAndEquipmentMember" />
    <link:label xml:lang="en-US" xlink:label="ater_FurnitureFixtureAndEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Furniture fixture and equipment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_FurnitureFixtureAndEquipmentMember" xlink:to="ater_FurnitureFixtureAndEquipmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_FurnitureFixtureAndEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Furniture, Fixtures and Equipment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_FurnitureFixtureAndEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Furniture Fixture And Equipment [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_LeaseholdImprovementsAndCapitalLeaseMember" xlink:type="locator" xlink:label="ater_LeaseholdImprovementsAndCapitalLeaseMember" />
    <link:label xml:lang="en-US" xlink:label="ater_LeaseholdImprovementsAndCapitalLeaseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Leasehold improvements and capital lease.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LeaseholdImprovementsAndCapitalLeaseMember" xlink:to="ater_LeaseholdImprovementsAndCapitalLeaseMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_LeaseholdImprovementsAndCapitalLeaseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leasehold Improvements and Capital Leases</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LeaseholdImprovementsAndCapitalLeaseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Leasehold Improvements And Capital Lease [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment, estimated useful life</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:to="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Useful Life</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment, estimated useful life</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives" xlink:to="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Estimated Useful Lives</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_IncomeTaxBenefitRecognitionCriteriaPercentageThreshold" xlink:type="locator" xlink:label="ater_IncomeTaxBenefitRecognitionCriteriaPercentageThreshold" />
    <link:label xml:lang="en-US" xlink:label="ater_IncomeTaxBenefitRecognitionCriteriaPercentageThreshold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax benefit recognition criteria percentage threshold.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_IncomeTaxBenefitRecognitionCriteriaPercentageThreshold" xlink:to="ater_IncomeTaxBenefitRecognitionCriteriaPercentageThreshold_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_IncomeTaxBenefitRecognitionCriteriaPercentageThreshold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax benefit recognition, minimum percentage of likelihood being realized</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_IncomeTaxBenefitRecognitionCriteriaPercentageThreshold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Benefit Recognition Criteria Percentage Threshold</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerRefundLiability" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerRefundLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerRefundLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Refund liabilities for sales returns</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerRefundLiability" xlink:to="us-gaap_ContractWithCustomerRefundLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerRefundLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Refund Liability</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueTable" xlink:to="us-gaap_DisaggregationOfRevenueTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation Of Revenue [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementGeographicalAxis" xlink:type="locator" xlink:label="srt_StatementGeographicalAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_StatementGeographicalAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Geographical [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain" xlink:type="locator" xlink:label="srt_SegmentGeographicalDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_SegmentGeographicalDomain" xlink:to="srt_SegmentGeographicalDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment Geographical [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NorthAmericaMember" xlink:type="locator" xlink:label="srt_NorthAmericaMember" />
    <link:label xml:lang="en-US" xlink:label="srt_NorthAmericaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">North America</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_NorthAmericaMember" xlink:to="srt_NorthAmericaMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_NorthAmericaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">North America [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_OtherThanNorthAmericaMember" xlink:type="locator" xlink:label="ater_OtherThanNorthAmericaMember" />
    <link:label xml:lang="en-US" xlink:label="ater_OtherThanNorthAmericaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other than North America.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_OtherThanNorthAmericaMember" xlink:to="ater_OtherThanNorthAmericaMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_OtherThanNorthAmericaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OtherThanNorthAmericaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Than North America [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelAxis" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerSalesChannelAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerSalesChannelAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Direct</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerSalesChannelAxis" xlink:to="us-gaap_ContractWithCustomerSalesChannelAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerSalesChannelAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Sales Channel [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelDomain" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerSalesChannelDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerSalesChannelDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract with Customer, Sales Channel</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerSalesChannelDomain" xlink:to="us-gaap_ContractWithCustomerSalesChannelDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerSalesChannelDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Sales Channel [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesChannelDirectlyToConsumerMember" xlink:type="locator" xlink:label="us-gaap_SalesChannelDirectlyToConsumerMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SalesChannelDirectlyToConsumerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Direct</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SalesChannelDirectlyToConsumerMember" xlink:to="us-gaap_SalesChannelDirectlyToConsumerMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SalesChannelDirectlyToConsumerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sales Channel Directly To Consumer [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesChannelThroughIntermediaryMember" xlink:type="locator" xlink:label="us-gaap_SalesChannelThroughIntermediaryMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SalesChannelThroughIntermediaryMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Wholesale</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SalesChannelThroughIntermediaryMember" xlink:to="us-gaap_SalesChannelThroughIntermediaryMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SalesChannelThroughIntermediaryMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sales Channel Through Intermediary [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ManagedPlatformAsAServiceMember" xlink:type="locator" xlink:label="ater_ManagedPlatformAsAServiceMember" />
    <link:label xml:lang="en-US" xlink:label="ater_ManagedPlatformAsAServiceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Managed platform as a service.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ManagedPlatformAsAServiceMember" xlink:to="ater_ManagedPlatformAsAServiceMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ManagedPlatformAsAServiceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Managed PaaS</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ManagedPlatformAsAServiceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Managed Platform As A Service [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueLineItems" xlink:to="us-gaap_DisaggregationOfRevenueLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation Of Revenue [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Total net revenue</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ProductRevenueMember" xlink:type="locator" xlink:label="ater_ProductRevenueMember" />
    <link:label xml:lang="en-US" xlink:label="ater_ProductRevenueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Product revenue.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ProductRevenueMember" xlink:to="ater_ProductRevenueMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ProductRevenueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product Revenue</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ProductRevenueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Product Revenue [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis" xlink:type="locator" xlink:label="srt_ProductOrServiceAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductOrServiceAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Product Or Service [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain" xlink:type="locator" xlink:label="srt_ProductsAndServicesDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductsAndServicesDomain" xlink:to="srt_ProductsAndServicesDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Products And Services [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HeatingCoolingAndAirQualityMember" xlink:type="locator" xlink:label="ater_HeatingCoolingAndAirQualityMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HeatingCoolingAndAirQualityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Heating cooling and air quality.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HeatingCoolingAndAirQualityMember" xlink:to="ater_HeatingCoolingAndAirQualityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HeatingCoolingAndAirQualityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Heating, Cooling and Air Quality</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HeatingCoolingAndAirQualityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Heating Cooling And Air Quality [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_KitchenAppliancesMember" xlink:type="locator" xlink:label="ater_KitchenAppliancesMember" />
    <link:label xml:lang="en-US" xlink:label="ater_KitchenAppliancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Kitchen appliances.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_KitchenAppliancesMember" xlink:to="ater_KitchenAppliancesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_KitchenAppliancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Kitchen Appliances</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_KitchenAppliancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Kitchen Appliances [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HealthAndBeautyMember" xlink:type="locator" xlink:label="ater_HealthAndBeautyMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HealthAndBeautyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Health and beauty.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HealthAndBeautyMember" xlink:to="ater_HealthAndBeautyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HealthAndBeautyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Health and Beauty</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HealthAndBeautyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Health And Beauty [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_PersonalProtectiveEquipmentMember" xlink:type="locator" xlink:label="ater_PersonalProtectiveEquipmentMember" />
    <link:label xml:lang="en-US" xlink:label="ater_PersonalProtectiveEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Personal protective equipment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PersonalProtectiveEquipmentMember" xlink:to="ater_PersonalProtectiveEquipmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_PersonalProtectiveEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Personal Protective Equipment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PersonalProtectiveEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Personal Protective Equipment [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_CookwareKitchenToolsAndGadgetsMember" xlink:type="locator" xlink:label="ater_CookwareKitchenToolsAndGadgetsMember" />
    <link:label xml:lang="en-US" xlink:label="ater_CookwareKitchenToolsAndGadgetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Cookware, Kitchen Tools and Gadgets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_CookwareKitchenToolsAndGadgetsMember" xlink:to="ater_CookwareKitchenToolsAndGadgetsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_CookwareKitchenToolsAndGadgetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cookware, Kitchen Tools and Gadgets</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_CookwareKitchenToolsAndGadgetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cookware Kitchen Tools And Gadgets [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HomeOfficeMember" xlink:type="locator" xlink:label="ater_HomeOfficeMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HomeOfficeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Home office.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HomeOfficeMember" xlink:to="ater_HomeOfficeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HomeOfficeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Home Office</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HomeOfficeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Home Office [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HousewaresMember" xlink:type="locator" xlink:label="ater_HousewaresMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HousewaresMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Housewares.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HousewaresMember" xlink:to="ater_HousewaresMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HousewaresMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Housewares</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HousewaresMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Housewares [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_EssentialOilsAndRelatedAccessoriesMember" xlink:type="locator" xlink:label="ater_EssentialOilsAndRelatedAccessoriesMember" />
    <link:label xml:lang="en-US" xlink:label="ater_EssentialOilsAndRelatedAccessoriesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Essential oils and related accessories.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_EssentialOilsAndRelatedAccessoriesMember" xlink:to="ater_EssentialOilsAndRelatedAccessoriesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_EssentialOilsAndRelatedAccessoriesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Essential Oils and Related Accessories</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_EssentialOilsAndRelatedAccessoriesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Essential Oils And Related Accessories [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_OtherMember" xlink:type="locator" xlink:label="ater_OtherMember" />
    <link:label xml:lang="en-US" xlink:label="ater_OtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_OtherMember" xlink:to="ater_OtherMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_OtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount" xlink:type="locator" xlink:label="us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of fair value in excess of carrying amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount" xlink:to="us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Reporting Unit Percentage Of Fair Value In Excess Of Carrying Amount</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairedFactsAndCircumstancesLeadingToImpairment" xlink:type="locator" xlink:label="us-gaap_GoodwillImpairedFactsAndCircumstancesLeadingToImpairment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillImpairedFactsAndCircumstancesLeadingToImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill impairment description</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillImpairedFactsAndCircumstancesLeadingToImpairment" xlink:to="us-gaap_GoodwillImpairedFactsAndCircumstancesLeadingToImpairment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillImpairedFactsAndCircumstancesLeadingToImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Impaired Facts And Circumstances Leading To Impairment</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:type="locator" xlink:label="us-gaap_GoodwillImpairmentLoss" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillImpairmentLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill impairment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillImpairmentLoss" xlink:to="us-gaap_GoodwillImpairmentLoss_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillImpairmentLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Impairment Loss</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ShippingAndHandlingCosts" xlink:type="locator" xlink:label="ater_ShippingAndHandlingCosts" />
    <link:label xml:lang="en-US" xlink:label="ater_ShippingAndHandlingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Shipping and Handling Costs.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ShippingAndHandlingCosts" xlink:to="ater_ShippingAndHandlingCosts_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdvertisingExpense" xlink:type="locator" xlink:label="us-gaap_AdvertisingExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdvertisingExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advertising cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdvertisingExpense" xlink:to="us-gaap_AdvertisingExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdvertisingExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Advertising Expense</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ShippingAndHandlingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shipping and handling cost</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ShippingAndHandlingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Shipping And Handling Costs</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:type="locator" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss from foreign currency transactions</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Currency Transaction Gain Loss Before Tax</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:type="locator" xlink:label="us-gaap_NumberOfReportableSegments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of reportable segments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfReportableSegments" xlink:to="us-gaap_NumberOfReportableSegments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Reportable Segments</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_OperatingLeaseLiabilityCurrentStatementsOfFinancialPositionExtensibleList" xlink:type="locator" xlink:label="ater_OperatingLeaseLiabilityCurrentStatementsOfFinancialPositionExtensibleList" />
    <link:label xml:lang="en-US" xlink:label="ater_OperatingLeaseLiabilityCurrentStatementsOfFinancialPositionExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating lease liability current statements of financial position extensible list.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_OperatingLeaseLiabilityCurrentStatementsOfFinancialPositionExtensibleList" xlink:to="ater_OperatingLeaseLiabilityCurrentStatementsOfFinancialPositionExtensibleList_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right-of-use asset</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseRightOfUseAsset" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Right Of Use Asset</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList" xlink:to="us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease, liability</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilityCurrent" xlink:to="us-gaap_OperatingLeaseLiabilityCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Liability Current</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OperatingLeaseLiabilityCurrentStatementsOfFinancialPositionExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Lease Liability Current Statements Of Financial Position Extensible List</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OperatingLeaseLiabilityCurrentStatementsOfFinancialPositionExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Liability Current Statements Of Financial Position Extensible List</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryFinishedGoods" xlink:type="locator" xlink:label="us-gaap_InventoryFinishedGoods" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory on-hand</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryFinishedGoods" xlink:to="us-gaap_InventoryFinishedGoods_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Inventory Finished Goods</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherInventoryInTransit" xlink:type="locator" xlink:label="us-gaap_OtherInventoryInTransit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherInventoryInTransit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory in-transit</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherInventoryInTransit" xlink:to="us-gaap_OtherInventoryInTransit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherInventoryInTransit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Inventory In Transit</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_InventoryNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Inventory</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherInventoryWarehouse" xlink:type="locator" xlink:label="us-gaap_OtherInventoryWarehouse" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherInventoryWarehouse_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory on-hand held by Amazon</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherInventoryWarehouse" xlink:to="us-gaap_OtherInventoryWarehouse_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherInventoryWarehouse_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Inventory Warehouse</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableGrossAllowanceAndNetAbstract" xlink:type="locator" xlink:label="us-gaap_AccountsNotesLoansAndFinancingReceivableGrossAllowanceAndNetAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsNotesLoansAndFinancingReceivableGrossAllowanceAndNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsNotesLoansAndFinancingReceivableGrossAllowanceAndNetAbstract" xlink:to="us-gaap_AccountsNotesLoansAndFinancingReceivableGrossAllowanceAndNetAbstract_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableGrossCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsReceivableGrossCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableGrossCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade accounts receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableGrossCurrent" xlink:to="us-gaap_AccountsReceivableGrossCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableGrossCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable Gross Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:type="locator" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance for doubtful accounts</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Doubtful Accounts Receivable Current</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts receivable&#8212;net</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:type="locator" xlink:label="us-gaap_LeaseholdImprovementsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leasehold Improvements</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseholdImprovementsMember" xlink:to="us-gaap_LeaseholdImprovementsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Leasehold Improvements [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingMember" xlink:type="locator" xlink:label="us-gaap_BuildingMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Building</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BuildingMember" xlink:to="us-gaap_BuildingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Building [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment, Gross</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Gross</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: accumulated depreciation and amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Depreciation Depletion And Amortization Property Plant And Equipment</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property and equipment&#8212;net</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Depreciation" xlink:type="locator" xlink:label="us-gaap_Depreciation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depreciation" xlink:to="us-gaap_Depreciation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:type="locator" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value By Balance Sheet Grouping [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:to="us-gaap_FairValueByBalanceSheetGroupingTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value By Balance Sheet Grouping [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value By Fair Value Hierarchy Level [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements Fair Value Hierarchy [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel1Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 1</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="us-gaap_FairValueInputsLevel1Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Inputs Level1 [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and restricted cash</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel2Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 2</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Inputs Level2 [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel3Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 3</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Inputs Level3 [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByLiabilityClassAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByLiabilityClassAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByLiabilityClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liability Class</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByLiabilityClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value By Liability Class [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:type="locator" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" />
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    <link:loc xlink:href="ater-20211231.xsd#ater_ContingentEarnOutConsiderationMember" xlink:type="locator" xlink:label="ater_ContingentEarnOutConsiderationMember" />
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    <link:loc xlink:href="ater-20211231.xsd#ater_WarrantLiabilityMember" xlink:type="locator" xlink:label="ater_WarrantLiabilityMember" />
    <link:label xml:lang="en-US" xlink:label="ater_WarrantLiabilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant liability.</link:label>
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    <link:label xml:lang="en-US" xlink:label="ater_WarrantLiabilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Liability [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investment Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:type="locator" xlink:label="us-gaap_InvestmentTypeCategorizationMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_InvestmentTypeCategorizationMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investment Type Categorization [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and Cash Equivalents</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsMember" xlink:to="us-gaap_CashAndCashEquivalentsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash And Cash Equivalents [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_RestrictedCashMember" xlink:type="locator" xlink:label="ater_RestrictedCashMember" />
    <link:label xml:lang="en-US" xlink:label="ater_RestrictedCashMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted cash.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_RestrictedCashMember" xlink:to="ater_RestrictedCashMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_RestrictedCashMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Cash</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_RestrictedCashMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsFairValueDisclosureAbstract" xlink:to="us-gaap_AssetsFairValueDisclosureAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Fair Value Disclosure [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_AssetsFairValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsFairValueDisclosure" xlink:to="us-gaap_AssetsFairValueDisclosure_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Fair Value Disclosure</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:to="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities Fair Value Disclosure [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_LiabilitiesFairValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesFairValueDisclosure" xlink:to="us-gaap_LiabilitiesFairValueDisclosure_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities Fair Value Disclosure</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ModificationOfWarrantLiabilityToEquityClassification" xlink:type="locator" xlink:label="ater_ModificationOfWarrantLiabilityToEquityClassification" />
    <link:label xml:lang="en-US" xlink:label="ater_ModificationOfWarrantLiabilityToEquityClassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Modification of warrant liability to equity classification.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ModificationOfWarrantLiabilityToEquityClassification" xlink:to="ater_ModificationOfWarrantLiabilityToEquityClassification_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_ChangeInFairValueOfWarrantLiability" xlink:type="locator" xlink:label="ater_ChangeInFairValueOfWarrantLiability" />
    <link:label xml:lang="en-US" xlink:label="ater_ChangeInFairValueOfWarrantLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in fair value of warrant liability.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ChangeInFairValueOfWarrantLiability" xlink:to="ater_ChangeInFairValueOfWarrantLiability_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_AcquisitionDateFairValueOfContingentEarnOutLiabilities" xlink:type="locator" xlink:label="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilities" />
    <link:label xml:lang="en-US" xlink:label="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Acquisition date fair value of contingent earn-out liabilities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilities" xlink:to="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilities_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_PaymentOfContingentEarnOutLiability" xlink:type="locator" xlink:label="ater_PaymentOfContingentEarnOutLiability" />
    <link:label xml:lang="en-US" xlink:label="ater_PaymentOfContingentEarnOutLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment of contingent earn-out liability.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PaymentOfContingentEarnOutLiability" xlink:to="ater_PaymentOfContingentEarnOutLiability_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_FairValueAtIssuanceOfWarrantLiability" xlink:type="locator" xlink:label="ater_FairValueAtIssuanceOfWarrantLiability" />
    <link:label xml:lang="en-US" xlink:label="ater_FairValueAtIssuanceOfWarrantLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value at issuance of warrant liability.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_FairValueAtIssuanceOfWarrantLiability" xlink:to="ater_FairValueAtIssuanceOfWarrantLiability_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Frequency</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByMeasurementFrequencyAxis" xlink:to="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value By Measurement Frequency [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Frequency</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementFrequencyDomain" xlink:to="us-gaap_FairValueMeasurementFrequencyDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Frequency [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsRecurringMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Recurring</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsRecurringMember" xlink:to="us-gaap_FairValueMeasurementsRecurringMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements Recurring [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Liabilities carried at fair value on a recurring basis, Beginning balance</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ModificationOfWarrantLiabilityToEquityClassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Modification of warrant liability to equity classification</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ModificationOfWarrantLiabilityToEquityClassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Modification Of Warrant Liability To Equity Classification</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ChangeInFairValueOfWarrantLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of warrant liability</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ChangeInFairValueOfWarrantLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Change In Fair Value Of Warrant Liability</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value at issuance of contingent earn-out liability</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Acquisition Date Fair Value Of Contingent Earn Out Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PaymentOfContingentEarnOutLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment of contingent earn-out liability</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PaymentOfContingentEarnOutLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payment Of Contingent Earn Out Liability</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Liabilities carried at fair value on a recurring basis, Ending balance</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_FairValueAtIssuanceOfWarrantLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value at issuance of warrant liability</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_FairValueAtIssuanceOfWarrantLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value At Issuance Of Warrant Liability</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_PrepaidInventory" xlink:type="locator" xlink:label="ater_PrepaidInventory" />
    <link:label xml:lang="en-US" xlink:label="ater_PrepaidInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepaid inventory.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PrepaidInventory" xlink:to="ater_PrepaidInventory_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_ConsultingFees" xlink:type="locator" xlink:label="ater_ConsultingFees" />
    <link:label xml:lang="en-US" xlink:label="ater_ConsultingFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Consulting fees.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ConsultingFees" xlink:to="ater_ConsultingFees_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_AmazonGlobalLogistics" xlink:type="locator" xlink:label="ater_AmazonGlobalLogistics" />
    <link:label xml:lang="en-US" xlink:label="ater_AmazonGlobalLogistics_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Amazon global logistics.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AmazonGlobalLogistics" xlink:to="ater_AmazonGlobalLogistics_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_PrepaidInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid inventory</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PrepaidInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Inventory</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashCurrent" xlink:type="locator" xlink:label="us-gaap_RestrictedCashCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashCurrent" xlink:to="us-gaap_RestrictedCashCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidInsurance" xlink:type="locator" xlink:label="us-gaap_PrepaidInsurance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidInsurance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid insurance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidInsurance" xlink:to="us-gaap_PrepaidInsurance_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidInsurance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Insurance</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ConsultingFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consulting fees</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ConsultingFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consulting Fees</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AmazonGlobalLogistics_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amazon global logistics</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AmazonGlobalLogistics_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amazon Global Logistics</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherPrepaidExpenseCurrent" xlink:type="locator" xlink:label="us-gaap_OtherPrepaidExpenseCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherPrepaidExpenseCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherPrepaidExpenseCurrent" xlink:to="us-gaap_OtherPrepaidExpenseCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherPrepaidExpenseCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Prepaid Expense Current</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Prepaid and other current assets</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AccruedLogisticsCostsCurrent" xlink:type="locator" xlink:label="ater_AccruedLogisticsCostsCurrent" />
    <link:label xml:lang="en-US" xlink:label="ater_AccruedLogisticsCostsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued logistics costs current.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AccruedLogisticsCostsCurrent" xlink:to="ater_AccruedLogisticsCostsCurrent_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_ProductRelatedAccruals" xlink:type="locator" xlink:label="ater_ProductRelatedAccruals" />
    <link:label xml:lang="en-US" xlink:label="ater_ProductRelatedAccruals_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Product related accruals.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ProductRelatedAccruals" xlink:to="ater_ProductRelatedAccruals_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_SalesReturnReserve" xlink:type="locator" xlink:label="ater_SalesReturnReserve" />
    <link:label xml:lang="en-US" xlink:label="ater_SalesReturnReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales return reserve.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SalesReturnReserve" xlink:to="ater_SalesReturnReserve_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_AccruedFulfillmentExpense" xlink:type="locator" xlink:label="ater_AccruedFulfillmentExpense" />
    <link:label xml:lang="en-US" xlink:label="ater_AccruedFulfillmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued fulfillment expense.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AccruedFulfillmentExpense" xlink:to="ater_AccruedFulfillmentExpense_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued compensation costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:to="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Related Liabilities Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedProfessionalFeesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedProfessionalFeesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued professional fees and consultants</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedProfessionalFeesCurrent" xlink:to="us-gaap_AccruedProfessionalFeesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedProfessionalFeesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Professional Fees Current</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AccruedLogisticsCostsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued logistics costs</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AccruedLogisticsCostsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Logistics Costs Current</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ProductRelatedAccruals_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product related accruals</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ProductRelatedAccruals_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Product Related Accruals</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesAndExciseTaxPayableCurrent" xlink:type="locator" xlink:label="us-gaap_SalesAndExciseTaxPayableCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SalesAndExciseTaxPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales tax payable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SalesAndExciseTaxPayableCurrent" xlink:to="us-gaap_SalesAndExciseTaxPayableCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SalesAndExciseTaxPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sales And Excise Tax Payable Current</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SalesReturnReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales return reserve</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SalesReturnReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sales Return Reserve</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AccruedFulfillmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued fulfillment expense</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AccruedFulfillmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Fulfillment Expense</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedInsuranceCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedInsuranceCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedInsuranceCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued insurance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedInsuranceCurrent" xlink:to="us-gaap_AccruedInsuranceCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedInsuranceCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Insurance Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedPayrollTaxesCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedPayrollTaxesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedPayrollTaxesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal payroll taxes payable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedPayrollTaxesCurrent" xlink:to="us-gaap_AccruedPayrollTaxesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedPayrollTaxesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Payroll Taxes Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestPayableCurrent" xlink:type="locator" xlink:label="us-gaap_InterestPayableCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest payable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPayableCurrent" xlink:to="us-gaap_InterestPayableCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">All other accruals</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Accrued Liabilities Current</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AccruedExpensesAndOtherLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accrued and other current liabilities</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_DebtOffsetAgainstAndExpenseOverTerm" xlink:type="locator" xlink:label="ater_DebtOffsetAgainstAndExpenseOverTerm" />
    <link:label xml:lang="en-US" xlink:label="ater_DebtOffsetAgainstAndExpenseOverTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt offset against and expense over the term.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DebtOffsetAgainstAndExpenseOverTerm" xlink:to="ater_DebtOffsetAgainstAndExpenseOverTerm_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateAxis" xlink:type="locator" xlink:label="us-gaap_VariableRateAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain" xlink:type="locator" xlink:label="us-gaap_VariableRateDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_VariableRateDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:type="locator" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">London Interbank Offered Rate (LIBOR)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:to="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">London Interbank Offered Rate L I B O R [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeAxis" xlink:to="us-gaap_LongtermDebtTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeDomain" xlink:to="us-gaap_LongtermDebtTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SeniorSecuredNoteMember" xlink:type="locator" xlink:label="ater_SeniorSecuredNoteMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SeniorSecuredNoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior secured note.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SeniorSecuredNoteMember" xlink:to="ater_SeniorSecuredNoteMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SeniorSecuredNoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior Secured Note</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SeniorSecuredNoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior Secured Note [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_TerminatedCreditAgreementMember" xlink:type="locator" xlink:label="ater_TerminatedCreditAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="ater_TerminatedCreditAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Terminated Credit Agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_TerminatedCreditAgreementMember" xlink:to="ater_TerminatedCreditAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_TerminatedCreditAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Terminated Credit Agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_TerminatedCreditAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Terminated Credit Agreement [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ZeroPercentageCouponSeniorSecuredPromissoryNoteMember" xlink:type="locator" xlink:label="ater_ZeroPercentageCouponSeniorSecuredPromissoryNoteMember" />
    <link:label xml:lang="en-US" xlink:label="ater_ZeroPercentageCouponSeniorSecuredPromissoryNoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Zero percentage coupon senior secured promissory note.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ZeroPercentageCouponSeniorSecuredPromissoryNoteMember" xlink:to="ater_ZeroPercentageCouponSeniorSecuredPromissoryNoteMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ZeroPercentageCouponSeniorSecuredPromissoryNoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">0% Coupon Senior Secured Promissory Note</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ZeroPercentageCouponSeniorSecuredPromissoryNoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Zero Percentage Coupon Senior Secured Promissory Note [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions By Related Party [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:type="locator" xlink:label="us-gaap_RelatedPartyDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestorMember" xlink:type="locator" xlink:label="us-gaap_InvestorMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investor</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestorMember" xlink:to="us-gaap_InvestorMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investor [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SecuritiesPurchaseAgreementMember" xlink:type="locator" xlink:label="ater_SecuritiesPurchaseAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SecuritiesPurchaseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities purchase agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SecuritiesPurchaseAgreementMember" xlink:to="ater_SecuritiesPurchaseAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SecuritiesPurchaseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities Purchase Agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SecuritiesPurchaseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Purchase Agreement [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrivatePlacementMember" xlink:type="locator" xlink:label="us-gaap_PrivatePlacementMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrivatePlacementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Private Placement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrivatePlacementMember" xlink:to="us-gaap_PrivatePlacementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrivatePlacementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Private Placement [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SeniorSecuredPromissoryNotesMember" xlink:type="locator" xlink:label="ater_SeniorSecuredPromissoryNotesMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SeniorSecuredPromissoryNotesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior secured promissory notes.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SeniorSecuredPromissoryNotesMember" xlink:to="ater_SeniorSecuredPromissoryNotesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SeniorSecuredPromissoryNotesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior Secured Promissory Notes</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SeniorSecuredPromissoryNotesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior Secured Promissory Notes [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailLoanMember" xlink:type="locator" xlink:label="ater_HighTrailLoanMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High Trail loan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailLoanMember" xlink:to="ater_HighTrailLoanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail Loans</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail Loan [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AprilLetterAgreementMember" xlink:type="locator" xlink:label="ater_AprilLetterAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AprilLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">April letter agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AprilLetterAgreementMember" xlink:to="ater_AprilLetterAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AprilLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">April Letter Agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AprilLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">April Letter Agreement [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SPAAmendmentMember" xlink:type="locator" xlink:label="ater_SPAAmendmentMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SPAAmendmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">SPA amendment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SPAAmendmentMember" xlink:to="ater_SPAAmendmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SPAAmendmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SPA Amendment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SPAAmendmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">S P A Amendment [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Warrant or Right</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Warrant or Right</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_FebruaryWarrantPennyWarrantAndAdditionalWarrantMember" xlink:type="locator" xlink:label="ater_FebruaryWarrantPennyWarrantAndAdditionalWarrantMember" />
    <link:label xml:lang="en-US" xlink:label="ater_FebruaryWarrantPennyWarrantAndAdditionalWarrantMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">February warrant, penny warrant and additional warrant.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_FebruaryWarrantPennyWarrantAndAdditionalWarrantMember" xlink:to="ater_FebruaryWarrantPennyWarrantAndAdditionalWarrantMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_FebruaryWarrantPennyWarrantAndAdditionalWarrantMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February Warrant, Penny Warrant and Additional Warrant</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_FebruaryWarrantPennyWarrantAndAdditionalWarrantMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">February Warrant Penny Warrant And Additional Warrant [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis" xlink:type="locator" xlink:label="us-gaap_AwardTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Award Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockMember" xlink:type="locator" xlink:label="us-gaap_RestrictedStockMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockMember" xlink:to="us-gaap_RestrictedStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_LetterAgreementsMember" xlink:type="locator" xlink:label="ater_LetterAgreementsMember" />
    <link:label xml:lang="en-US" xlink:label="ater_LetterAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Letter agreements.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LetterAgreementsMember" xlink:to="ater_LetterAgreementsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_LetterAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letter Agreements</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LetterAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Letter Agreements [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailAprilTwoThousandAndTwentyOneNotesMember" xlink:type="locator" xlink:label="ater_HighTrailAprilTwoThousandAndTwentyOneNotesMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailAprilTwoThousandAndTwentyOneNotesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High Trail 2021 notes.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailAprilTwoThousandAndTwentyOneNotesMember" xlink:to="ater_HighTrailAprilTwoThousandAndTwentyOneNotesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailAprilTwoThousandAndTwentyOneNotesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail April 2021 Notes</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailAprilTwoThousandAndTwentyOneNotesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail April Two Thousand And Twenty One Notes [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ExtinguishmentOfDebtAxis" xlink:type="locator" xlink:label="us-gaap_ExtinguishmentOfDebtAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ExtinguishmentOfDebtAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Extinguishment of Debt</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExtinguishmentOfDebtAxis" xlink:to="us-gaap_ExtinguishmentOfDebtAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ExtinguishmentOfDebtAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Extinguishment Of Debt [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ExtinguishmentOfDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_ExtinguishmentOfDebtTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ExtinguishmentOfDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Extinguishment of Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExtinguishmentOfDebtTypeDomain" xlink:to="us-gaap_ExtinguishmentOfDebtTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ExtinguishmentOfDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Extinguishment Of Debt Type [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailDebtRepaymentMember" xlink:type="locator" xlink:label="ater_HighTrailDebtRepaymentMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDebtRepaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High Trail debt repayment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailDebtRepaymentMember" xlink:to="ater_HighTrailDebtRepaymentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDebtRepaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail Debt Repayment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailDebtRepaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail Debt Repayment [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_HighTrailAprilTwoThousandAndTwentyOneNotesRepaymentMember" xlink:type="locator" xlink:label="ater_HighTrailAprilTwoThousandAndTwentyOneNotesRepaymentMember" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailAprilTwoThousandAndTwentyOneNotesRepaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">High Trail 2021 notes repayment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_HighTrailAprilTwoThousandAndTwentyOneNotesRepaymentMember" xlink:to="ater_HighTrailAprilTwoThousandAndTwentyOneNotesRepaymentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailAprilTwoThousandAndTwentyOneNotesRepaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail April 2021 Notes Repayment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrailAprilTwoThousandAndTwentyOneNotesRepaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trail April Two Thousand And Twenty One Notes Repayment [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditMember" xlink:type="locator" xlink:label="us-gaap_LineOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditMember" xlink:to="us-gaap_LineOfCreditMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit facility maximum borrowing amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Maximum Borrowing Capacity</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, basis spread on variable rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Basis Spread On Variable Rate1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility, unused capacity, commitment fee percentage</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:to="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Unused Capacity Commitment Fee Percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DebtOffsetAgainstAndExpenseOverTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt offset against and expense over the term</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DebtOffsetAgainstAndExpenseOverTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Offset Against And Expense Over Term</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentFaceAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate principal amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFaceAmount" xlink:to="us-gaap_DebtInstrumentFaceAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Face Amount</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand" xlink:type="locator" xlink:label="ater_LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility financial covenant minimum liquidity requirement in cash on hand.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand" xlink:to="ater_LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility, minimum liquidity financial covenant requirement in cash on hand</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Financial Covenant Minimum Liquidity Requirement In Cash On Hand</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_PrepaymentFeePercentage" xlink:type="locator" xlink:label="ater_PrepaymentFeePercentage" />
    <link:label xml:lang="en-US" xlink:label="ater_PrepaymentFeePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepayment fee, percentage.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PrepaymentFeePercentage" xlink:to="ater_PrepaymentFeePercentage_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCredit" xlink:type="locator" xlink:label="us-gaap_LineOfCredit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit, outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCredit" xlink:to="us-gaap_LineOfCredit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available balance of credit facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Remaining Borrowing Capacity</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PrepaymentFeePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepayment fee, percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PrepaymentFeePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prepayment Fee Percentage</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_LineOfCreditFacilityAndTermLoanInterestExpense" xlink:type="locator" xlink:label="ater_LineOfCreditFacilityAndTermLoanInterestExpense" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityAndTermLoanInterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility and term loan interest expense.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LineOfCreditFacilityAndTermLoanInterestExpense" xlink:to="ater_LineOfCreditFacilityAndTermLoanInterestExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityAndTermLoanInterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense of credit facilities</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityAndTermLoanInterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility And Term Loan Interest Expense</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts" xlink:type="locator" xlink:label="us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expense related to debt issuance costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts" xlink:to="us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Related Commitment Fees And Debt Issuance Costs</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_DebtInstrumentMaturityMonthAndYear" xlink:type="locator" xlink:label="ater_DebtInstrumentMaturityMonthAndYear" />
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentMaturityMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument maturity month and year.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DebtInstrumentMaturityMonthAndYear" xlink:to="ater_DebtInstrumentMaturityMonthAndYear_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of variable rate basis</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:to="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Description Of Variable Rate Basis</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentMaturityMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument maturity month and year</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentMaturityMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Maturity Month And Year</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repaying of term loan</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpense" xlink:type="locator" xlink:label="us-gaap_InterestExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:type="locator" xlink:label="us-gaap_AmortizationOfFinancingCosts" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of debt issuance costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfFinancingCosts" xlink:to="us-gaap_AmortizationOfFinancingCosts_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Financing Costs</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_LineOfCreditFacilityNumberOfInstallments" xlink:type="locator" xlink:label="ater_LineOfCreditFacilityNumberOfInstallments" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityNumberOfInstallments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility number of monthly installments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LineOfCreditFacilityNumberOfInstallments" xlink:to="ater_LineOfCreditFacilityNumberOfInstallments_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_LineOfCreditFacilityAggregatePrincipalAmount" xlink:type="locator" xlink:label="ater_LineOfCreditFacilityAggregatePrincipalAmount" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityAggregatePrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility aggregate principal amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LineOfCreditFacilityAggregatePrincipalAmount" xlink:to="ater_LineOfCreditFacilityAggregatePrincipalAmount_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromSecuredLinesOfCredit" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSecuredLinesOfCredit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSecuredLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross proceeds received</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSecuredLinesOfCredit" xlink:to="us-gaap_ProceedsFromSecuredLinesOfCredit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSecuredLinesOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Secured Lines Of Credit</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityAggregatePrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate principal amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityAggregatePrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Aggregate Principal Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityNumberOfInstallments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of repayment installments</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityNumberOfInstallments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Number Of Installments</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityFrequencyOfPayments" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPayments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility, frequency of payments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityFrequencyOfPayments" xlink:to="us-gaap_LineOfCreditFacilityFrequencyOfPayments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Frequency Of Payments</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash payments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal" xlink:to="us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Periodic Payment Principal</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_LinesOfCreditGrossCurrent" xlink:type="locator" xlink:label="ater_LinesOfCreditGrossCurrent" />
    <link:label xml:lang="en-US" xlink:label="ater_LinesOfCreditGrossCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Lines of credit gross current.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LinesOfCreditGrossCurrent" xlink:to="ater_LinesOfCreditGrossCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_LoansPayableGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail Note</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LoansPayableGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Payable Gross</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LinesOfCreditGrossCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">MidCap Credit Facility &#8211; December 2021</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LinesOfCreditGrossCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lines Of Credit Gross Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:type="locator" xlink:label="us-gaap_DeferredFinanceCostsNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: deferred debt issuance costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFinanceCostsNet" xlink:to="us-gaap_DeferredFinanceCostsNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Finance Costs Net</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DiscountAssociatedWithIssuanceOfWarrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: discount associated with issuance of warrants</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DiscountAssociatedWithIssuanceOfWarrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Discount Associated With Issuance Of Warrants</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DiscountAssociatedWithOriginalIssuanceOfLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: discount associated with original issuance of loan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DiscountAssociatedWithOriginalIssuanceOfLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Discount Associated With Original Issuance Of Loan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LongTermLoansRelatedToWarrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Trail warrant</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LongTermLoansRelatedToWarrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Loans Related To Warrant</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrialWarrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: High Trail warrant</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_HighTrialWarrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">High Trial Warrant</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LoansPayable" xlink:type="locator" xlink:label="us-gaap_LoansPayable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total December 2020 Note</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansPayable" xlink:to="us-gaap_LoansPayable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Payable</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less-current portion</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermLoansPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Term loan-non current portion</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand" xlink:type="locator" xlink:label="ater_LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility covenant minimum liquidity requirement in unrestricted cash on hand.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand" xlink:to="ater_LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility covenant minimum liquidity requirement in unrestricted cash on hand</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Covenant Minimum Liquidity Requirement In Unrestricted Cash On Hand</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveVerboseLabel">Interest rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Rate Stated Percentage</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentMaturityDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Maturity Date</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants to purchase shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesIssued" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock shares issued</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Issued</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_WarrantAmendmentConditionDescription" xlink:type="locator" xlink:label="ater_WarrantAmendmentConditionDescription" />
    <link:label xml:lang="en-US" xlink:label="ater_WarrantAmendmentConditionDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant amendment condition description.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_WarrantAmendmentConditionDescription" xlink:to="ater_WarrantAmendmentConditionDescription_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_WarrantAmendmentConditionDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant amendment description</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_WarrantAmendmentConditionDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Amendment Condition Description</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ReclassificationFromLiabilityToComponentOfEquity" xlink:type="locator" xlink:label="ater_ReclassificationFromLiabilityToComponentOfEquity" />
    <link:label xml:lang="en-US" xlink:label="ater_ReclassificationFromLiabilityToComponentOfEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification from a liability to a component of equity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ReclassificationFromLiabilityToComponentOfEquity" xlink:to="ater_ReclassificationFromLiabilityToComponentOfEquity_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_ReclassificationFromComponentOfEquityToLiability" xlink:type="locator" xlink:label="ater_ReclassificationFromComponentOfEquityToLiability" />
    <link:label xml:lang="en-US" xlink:label="ater_ReclassificationFromComponentOfEquityToLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification from component of equity to liability.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ReclassificationFromComponentOfEquityToLiability" xlink:to="ater_ReclassificationFromComponentOfEquityToLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ReclassificationFromLiabilityToComponentOfEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification from a liability to component of equity</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ReclassificationFromLiabilityToComponentOfEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification From Liability To Component Of Equity</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ReclassificationFromComponentOfEquityToLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification from a component of equity to liability</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ReclassificationFromComponentOfEquityToLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification From Component Of Equity To Liability</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AcceleratedPrincipalAmount" xlink:type="locator" xlink:label="ater_AcceleratedPrincipalAmount" />
    <link:label xml:lang="en-US" xlink:label="ater_AcceleratedPrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accelerated principal amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AcceleratedPrincipalAmount" xlink:to="ater_AcceleratedPrincipalAmount_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_RepaymentsOfDebtAfterAcceleratedPrincipalAddition" xlink:type="locator" xlink:label="ater_RepaymentsOfDebtAfterAcceleratedPrincipalAddition" />
    <link:label xml:lang="en-US" xlink:label="ater_RepaymentsOfDebtAfterAcceleratedPrincipalAddition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Repayment of debt after accelerated principal addition.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_RepaymentsOfDebtAfterAcceleratedPrincipalAddition" xlink:to="ater_RepaymentsOfDebtAfterAcceleratedPrincipalAddition_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtDefaultShorttermDebtDescriptionOfNoticeOfDefault" xlink:type="locator" xlink:label="us-gaap_DebtDefaultShorttermDebtDescriptionOfNoticeOfDefault" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtDefaultShorttermDebtDescriptionOfNoticeOfDefault_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Event of default description</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDefaultShorttermDebtDescriptionOfNoticeOfDefault" xlink:to="us-gaap_DebtDefaultShorttermDebtDescriptionOfNoticeOfDefault_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtDefaultShorttermDebtDescriptionOfNoticeOfDefault_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Default Shortterm Debt Description Of Notice Of Default</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtDefaultShorttermDebtAmount" xlink:type="locator" xlink:label="us-gaap_DebtDefaultShorttermDebtAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtDefaultShorttermDebtAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument default amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDefaultShorttermDebtAmount" xlink:to="us-gaap_DebtDefaultShorttermDebtAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtDefaultShorttermDebtAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Default Shortterm Debt Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AcceleratedPrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accelerated principal amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AcceleratedPrincipalAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accelerated Principal Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_RepaymentsOfDebtAfterAcceleratedPrincipalAddition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument redemption amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_RepaymentsOfDebtAfterAcceleratedPrincipalAddition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Repayments Of Debt After Accelerated Principal Addition</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument redemption price percentage</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:to="us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Redemption Price Percentage Of Principal Amount Redeemed</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentIncreaseAccruedInterest" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentIncreaseAccruedInterest" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentIncreaseAccruedInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued, Unpaid interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentIncreaseAccruedInterest" xlink:to="us-gaap_DebtInstrumentIncreaseAccruedInterest_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentIncreaseAccruedInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Increase Accrued Interest</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BasePercentageOfLessorsUsedToCalculateCurrentEventOfDefaultAcceleration" xlink:type="locator" xlink:label="ater_BasePercentageOfLessorsUsedToCalculateCurrentEventOfDefaultAcceleration" />
    <link:label xml:lang="en-US" xlink:label="ater_BasePercentageOfLessorsUsedToCalculateCurrentEventOfDefaultAcceleration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Base percentage of lessors used to calculate current event of default acceleration.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BasePercentageOfLessorsUsedToCalculateCurrentEventOfDefaultAcceleration" xlink:to="ater_BasePercentageOfLessorsUsedToCalculateCurrentEventOfDefaultAcceleration_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment" xlink:type="locator" xlink:label="ater_DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment" />
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument, debt default, description of current event of default acceleration payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment" xlink:to="ater_DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_BasePercentageOfLessorsUsedToCalculateCurrentEventOfDefaultAcceleration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Base percentage used to calculate current event of default acceleration</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BasePercentageOfLessorsUsedToCalculateCurrentEventOfDefaultAcceleration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Base Percentage Of Lessors Used To Calculate Current Event Of Default Acceleration</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of current event of default acceleration payment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Debt Default Description Of Current Event Of Default Acceleration Payment</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_PaymentInCashOfCurrentEventOfDefaultAccelerationAmount" xlink:type="locator" xlink:label="ater_PaymentInCashOfCurrentEventOfDefaultAccelerationAmount" />
    <link:label xml:lang="en-US" xlink:label="ater_PaymentInCashOfCurrentEventOfDefaultAccelerationAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment in cash of current event of default acceleration amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PaymentInCashOfCurrentEventOfDefaultAccelerationAmount" xlink:to="ater_PaymentInCashOfCurrentEventOfDefaultAccelerationAmount_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount" xlink:type="locator" xlink:label="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount" />
    <link:label xml:lang="en-US" xlink:label="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment in shares of current event of default acceleration amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount" xlink:to="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationShares" xlink:type="locator" xlink:label="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationShares" />
    <link:label xml:lang="en-US" xlink:label="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment in shares of current event of default acceleration shares.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationShares" xlink:to="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationShares_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_PaymentInCashOfCurrentEventOfDefaultAccelerationAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment in cash of current event of default acceleration amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PaymentInCashOfCurrentEventOfDefaultAccelerationAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payment In Cash Of Current Event Of Default Acceleration Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment in shares of current event of default acceleration amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payment In Shares Of Current Event Of Default Acceleration Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment in shares of current event of default acceleration shares</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payment In Shares Of Current Event Of Default Acceleration Shares</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharePrice" xlink:type="locator" xlink:label="us-gaap_SharePrice" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share price</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharePrice" xlink:to="us-gaap_SharePrice_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Price</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_WarrantsPriorToDay" xlink:type="locator" xlink:label="ater_WarrantsPriorToDay" />
    <link:label xml:lang="en-US" xlink:label="ater_WarrantsPriorToDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants prior to day.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_WarrantsPriorToDay" xlink:to="ater_WarrantsPriorToDay_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityCollateralFeesAmount" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityCollateralFeesAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityCollateralFeesAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase minimum cash threshold covenant</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityCollateralFeesAmount" xlink:to="us-gaap_LineOfCreditFacilityCollateralFeesAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityCollateralFeesAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Collateral Fees Amount</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableSale" xlink:type="locator" xlink:label="us-gaap_AccountsReceivableSale" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableSale" xlink:to="us-gaap_AccountsReceivableSale_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable Sale</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Cash and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_WarrantsPriorToDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants exercise period after resale</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_WarrantsPriorToDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Prior To Day</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ClassOfWarrantExercisableToCommonStockPercentage" xlink:type="locator" xlink:label="ater_ClassOfWarrantExercisableToCommonStockPercentage" />
    <link:label xml:lang="en-US" xlink:label="ater_ClassOfWarrantExercisableToCommonStockPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrant exercisable to common stock percentage.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ClassOfWarrantExercisableToCommonStockPercentage" xlink:to="ater_ClassOfWarrantExercisableToCommonStockPercentage_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays" xlink:type="locator" xlink:label="ater_ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays" />
    <link:label xml:lang="en-US" xlink:label="ater_ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrant or rights consecutive trading days.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays" xlink:to="ater_ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ClassOfWarrantExercisableToCommonStockPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant exercisable to common stock percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ClassOfWarrantExercisableToCommonStockPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Exercisable To Common Stock Percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants consecutive trading days</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Rights Convertible Consecutive Trading Days</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BeneficialOwnershipLimitPercentage" xlink:type="locator" xlink:label="ater_BeneficialOwnershipLimitPercentage" />
    <link:label xml:lang="en-US" xlink:label="ater_BeneficialOwnershipLimitPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Beneficial ownership limit, percentage.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BeneficialOwnershipLimitPercentage" xlink:to="ater_BeneficialOwnershipLimitPercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_BeneficialOwnershipLimitPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beneficial ownership limit, percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BeneficialOwnershipLimitPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Beneficial Ownership Limit Percentage</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants to purchase shares, exercise price</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_CommonStockIssuedSubjectToSatisfyObligationToRepayAccelerationAmount" xlink:type="locator" xlink:label="ater_CommonStockIssuedSubjectToSatisfyObligationToRepayAccelerationAmount" />
    <link:label xml:lang="en-US" xlink:label="ater_CommonStockIssuedSubjectToSatisfyObligationToRepayAccelerationAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock issued subject to satisfy obligation to repay acceleration amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_CommonStockIssuedSubjectToSatisfyObligationToRepayAccelerationAmount" xlink:to="ater_CommonStockIssuedSubjectToSatisfyObligationToRepayAccelerationAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_CommonStockIssuedSubjectToSatisfyObligationToRepayAccelerationAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock issued subject to satisfy obligation to repay acceleration amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_CommonStockIssuedSubjectToSatisfyObligationToRepayAccelerationAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Issued Subject To Satisfy Obligation To Repay Acceleration Amount</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_NotesExtinguishedInExchangeForDebtRepayment" xlink:type="locator" xlink:label="ater_NotesExtinguishedInExchangeForDebtRepayment" />
    <link:label xml:lang="en-US" xlink:label="ater_NotesExtinguishedInExchangeForDebtRepayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Notes extinguished in exchange for debt repayment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_NotesExtinguishedInExchangeForDebtRepayment" xlink:to="ater_NotesExtinguishedInExchangeForDebtRepayment_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_NotesExtinguishedInExchangeForDebtRepayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes extinguished in exchange for debt repayment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_NotesExtinguishedInExchangeForDebtRepayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Notes Extinguished In Exchange For Debt Repayment</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit facility, interest rate per annum</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:to="us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Interest Rate During Period</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ClassOfWarrantsOrRightsExercisableTerm" xlink:type="locator" xlink:label="ater_ClassOfWarrantsOrRightsExercisableTerm" />
    <link:label xml:lang="en-US" xlink:label="ater_ClassOfWarrantsOrRightsExercisableTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrants or rights exercisable term.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ClassOfWarrantsOrRightsExercisableTerm" xlink:to="ater_ClassOfWarrantsOrRightsExercisableTerm_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ClassOfWarrantsOrRightsExercisableTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants term</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ClassOfWarrantsOrRightsExercisableTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrants Or Rights Exercisable Term</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LinesOfCreditCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total MidCap Credit Facility &#8211; December 2021</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:type="locator" xlink:label="us-gaap_InvestmentIncomeInterest" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInterest" xlink:to="us-gaap_InvestmentIncomeInterest_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income Interest</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Total interest expense, net</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityNoteAbstract" xlink:type="locator" xlink:label="us-gaap_StockholdersEquityNoteAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityNoteAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity Note [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteAbstract" xlink:to="us-gaap_StockholdersEquityNoteAbstract_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_StockholdersEquityLineItems" xlink:type="locator" xlink:label="ater_StockholdersEquityLineItems" />
    <link:label xml:lang="en-US" xlink:label="ater_StockholdersEquityLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stockholders Equity [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_StockholdersEquityLineItems" xlink:to="ater_StockholdersEquityLineItems_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_StockholdersEquityTable" xlink:type="locator" xlink:label="ater_StockholdersEquityTable" />
    <link:label xml:lang="en-US" xlink:label="ater_StockholdersEquityTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stockholders Equity [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_StockholdersEquityTable" xlink:to="ater_StockholdersEquityTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_StockholdersEquityTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders Equity [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_StockholdersEquityTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IPOMember" xlink:type="locator" xlink:label="us-gaap_IPOMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IPOMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial Public Offering</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IPOMember" xlink:to="us-gaap_IPOMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IPOMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">I P O [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_StockholdersEquityLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders Equity [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_StockholdersEquityLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockVotingRights" xlink:type="locator" xlink:label="us-gaap_CommonStockVotingRights" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockVotingRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, voting rights</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockVotingRights" xlink:to="us-gaap_CommonStockVotingRights_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockVotingRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Voting Rights</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issuance of common stock, shares</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharesIssuedPricePerShare" xlink:type="locator" xlink:label="us-gaap_SharesIssuedPricePerShare" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued, price per share</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssuedPricePerShare" xlink:to="us-gaap_SharesIssuedPricePerShare_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued Price Per Share</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds from sale of common stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Common Stock</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_UnderwritingDiscountsAndCommissions" xlink:type="locator" xlink:label="ater_UnderwritingDiscountsAndCommissions" />
    <link:label xml:lang="en-US" xlink:label="ater_UnderwritingDiscountsAndCommissions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwriting discounts and commissions.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_UnderwritingDiscountsAndCommissions" xlink:to="ater_UnderwritingDiscountsAndCommissions_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_OtherOfferingExpenses" xlink:type="locator" xlink:label="ater_OtherOfferingExpenses" />
    <link:label xml:lang="en-US" xlink:label="ater_OtherOfferingExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other offering expenses.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_OtherOfferingExpenses" xlink:to="ater_OtherOfferingExpenses_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_UnderwritingDiscountsAndCommissions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriting discounts and commissions</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_UnderwritingDiscountsAndCommissions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Underwriting Discounts And Commissions</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OtherOfferingExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other offering expenses</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OtherOfferingExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Offering Expenses</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:type="locator" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of stock, number of shares issued in transaction</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Number Of Shares Issued In Transaction</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockPricePerShare" xlink:type="locator" xlink:label="us-gaap_SaleOfStockPricePerShare" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of stock, price per share</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockPricePerShare" xlink:to="us-gaap_SaleOfStockPricePerShare_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Price Per Share</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:type="locator" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of stock, proceeds net of offering costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:to="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Consideration Received On Transaction</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis" xlink:type="locator" xlink:label="us-gaap_PlanNameAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain" xlink:type="locator" xlink:label="us-gaap_PlanNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameDomain" xlink:to="us-gaap_PlanNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AterianTwoThousandFourteenPlanMember" xlink:type="locator" xlink:label="ater_AterianTwoThousandFourteenPlanMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AterianTwoThousandFourteenPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Aterian two thousand fourteen plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AterianTwoThousandFourteenPlanMember" xlink:to="ater_AterianTwoThousandFourteenPlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AterianTwoThousandFourteenPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aterian 2014 Plan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AterianTwoThousandFourteenPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Aterian Two Thousand Fourteen Plan [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_TwoThousandEighteenEquityIncentivePlanMember" xlink:type="locator" xlink:label="ater_TwoThousandEighteenEquityIncentivePlanMember" />
    <link:label xml:lang="en-US" xlink:label="ater_TwoThousandEighteenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand eighteen equity incentive plan member.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_TwoThousandEighteenEquityIncentivePlanMember" xlink:to="ater_TwoThousandEighteenEquityIncentivePlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_TwoThousandEighteenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2018 Plan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_TwoThousandEighteenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Eighteen Equity Incentive Plan [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VestingAxis" xlink:type="locator" xlink:label="us-gaap_VestingAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VestingAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VestingAxis" xlink:to="us-gaap_VestingAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VestingAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VestingDomain" xlink:type="locator" xlink:label="us-gaap_VestingDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VestingDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VestingDomain" xlink:to="us-gaap_VestingDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VestingDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Award, Tranche One</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationAwardTrancheOneMember" xlink:to="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche One [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Award, Tranche Two</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationAwardTrancheTwoMember" xlink:to="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche Two [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_FirstAnniversaryMember" xlink:type="locator" xlink:label="ater_FirstAnniversaryMember" />
    <link:label xml:lang="en-US" xlink:label="ater_FirstAnniversaryMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">First anniversary.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_FirstAnniversaryMember" xlink:to="ater_FirstAnniversaryMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_FirstAnniversaryMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting on First Anniversary</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_FirstAnniversaryMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">First Anniversary [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_OverThirtySixMonthsMember" xlink:type="locator" xlink:label="ater_OverThirtySixMonthsMember" />
    <link:label xml:lang="en-US" xlink:label="ater_OverThirtySixMonthsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Over thirty-six months.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_OverThirtySixMonthsMember" xlink:to="ater_OverThirtySixMonthsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_OverThirtySixMonthsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting Over Succeeding 36 Months</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OverThirtySixMonthsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Over Thirty Six Months [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_OverTwentyFourMonthsMember" xlink:type="locator" xlink:label="ater_OverTwentyFourMonthsMember" />
    <link:label xml:lang="en-US" xlink:label="ater_OverTwentyFourMonthsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Over twenty-four months.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_OverTwentyFourMonthsMember" xlink:to="ater_OverTwentyFourMonthsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_OverTwentyFourMonthsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting Over Succeeding 24 Months</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OverTwentyFourMonthsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Over Twenty Four Months [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_TwoThousandNineteenEquityPlanMember" xlink:type="locator" xlink:label="ater_TwoThousandNineteenEquityPlanMember" />
    <link:label xml:lang="en-US" xlink:label="ater_TwoThousandNineteenEquityPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">2019 equity plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_TwoThousandNineteenEquityPlanMember" xlink:to="ater_TwoThousandNineteenEquityPlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_TwoThousandNineteenEquityPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2019 Equity Plan</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_TwoThousandNineteenEquityPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Nineteen Equity Plan [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ShareBasedCompensationAwardTrancheThreeVestingDateOneMember" xlink:type="locator" xlink:label="ater_ShareBasedCompensationAwardTrancheThreeVestingDateOneMember" />
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheThreeVestingDateOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation award tranche three vesting date one.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ShareBasedCompensationAwardTrancheThreeVestingDateOneMember" xlink:to="ater_ShareBasedCompensationAwardTrancheThreeVestingDateOneMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheThreeVestingDateOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Award, Tranche Three, Vesting Date 1</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheThreeVestingDateOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche Three Vesting Date One [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ShareBasedCompensationAwardTrancheThreeVestingDateTwoMember" xlink:type="locator" xlink:label="ater_ShareBasedCompensationAwardTrancheThreeVestingDateTwoMember" />
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheThreeVestingDateTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation award tranche three vesting date two.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ShareBasedCompensationAwardTrancheThreeVestingDateTwoMember" xlink:to="ater_ShareBasedCompensationAwardTrancheThreeVestingDateTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheThreeVestingDateTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Award, Tranche Three, Vesting Date 2</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheThreeVestingDateTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche Three Vesting Date Two [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ShareBasedCompensationAwardTrancheFourVestingDateOneMember" xlink:type="locator" xlink:label="ater_ShareBasedCompensationAwardTrancheFourVestingDateOneMember" />
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheFourVestingDateOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation award tranche four vesting date one.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ShareBasedCompensationAwardTrancheFourVestingDateOneMember" xlink:to="ater_ShareBasedCompensationAwardTrancheFourVestingDateOneMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheFourVestingDateOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Award, Tranche Four, Vesting Date 1</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheFourVestingDateOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche Four Vesting Date One [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ShareBasedCompensationAwardTrancheFourVestingDateTwoMember" xlink:type="locator" xlink:label="ater_ShareBasedCompensationAwardTrancheFourVestingDateTwoMember" />
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheFourVestingDateTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation award tranche four vesting date two.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ShareBasedCompensationAwardTrancheFourVestingDateTwoMember" xlink:to="ater_ShareBasedCompensationAwardTrancheFourVestingDateTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheFourVestingDateTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Award, Tranche Four, Vesting Date 2</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationAwardTrancheFourVestingDateTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche Four Vesting Date Two [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:type="locator" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares reserved for future issuance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:to="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Capital Shares Reserved For Future Issuance</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options vesting period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options vesting percentage</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercisable period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" xlink:type="locator" xlink:label="ater_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" />
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-based compensation arrangement by share-based payment award vesting date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" xlink:to="ater_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award vesting date</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Vesting Date</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allocated Share Based Compensation Expense</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_CommitmentAndContingenciesLineItems" xlink:type="locator" xlink:label="ater_CommitmentAndContingenciesLineItems" />
    <link:label xml:lang="en-US" xlink:label="ater_CommitmentAndContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitment and contingencies.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_CommitmentAndContingenciesLineItems" xlink:to="ater_CommitmentAndContingenciesLineItems_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_CommitmentAndContingenciesTable" xlink:type="locator" xlink:label="ater_CommitmentAndContingenciesTable" />
    <link:label xml:lang="en-US" xlink:label="ater_CommitmentAndContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitment and contingencies.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_CommitmentAndContingenciesTable" xlink:to="ater_CommitmentAndContingenciesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_CommitmentAndContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitment And Contingencies [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_CommitmentAndContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitment And Contingencies [Table]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_FirstPaymentMember" xlink:type="locator" xlink:label="ater_FirstPaymentMember" />
    <link:label xml:lang="en-US" xlink:label="ater_FirstPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">First payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_FirstPaymentMember" xlink:to="ater_FirstPaymentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_FirstPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">First Payment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_FirstPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">First Payment [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SecondPaymentMember" xlink:type="locator" xlink:label="ater_SecondPaymentMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SecondPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Second payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SecondPaymentMember" xlink:to="ater_SecondPaymentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SecondPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Second Payment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SecondPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Second Payment [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ThirdPaymentMember" xlink:type="locator" xlink:label="ater_ThirdPaymentMember" />
    <link:label xml:lang="en-US" xlink:label="ater_ThirdPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Third payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ThirdPaymentMember" xlink:to="ater_ThirdPaymentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_ThirdPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Third Payment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ThirdPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Third Payment [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SettlementAgreementMember" xlink:type="locator" xlink:label="ater_SettlementAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SettlementAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Settlement agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SettlementAgreementMember" xlink:to="ater_SettlementAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SettlementAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement Agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SettlementAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Settlement Agreement [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SecuritiesClassActionMember" xlink:type="locator" xlink:label="ater_SecuritiesClassActionMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SecuritiesClassActionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities class action.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SecuritiesClassActionMember" xlink:to="ater_SecuritiesClassActionMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SecuritiesClassActionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities Class Action</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SecuritiesClassActionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Class Action [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SabbyVolatilityWarrantMasterFundLtdMember" xlink:type="locator" xlink:label="ater_SabbyVolatilityWarrantMasterFundLtdMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SabbyVolatilityWarrantMasterFundLtdMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sabby Volatility Warrant Master Fund Ltd.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SabbyVolatilityWarrantMasterFundLtdMember" xlink:to="ater_SabbyVolatilityWarrantMasterFundLtdMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SabbyVolatilityWarrantMasterFundLtdMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sabby Volatility Warrant Master Fund Ltd</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SabbyVolatilityWarrantMasterFundLtdMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sabby Volatility Warrant Master Fund Ltd [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_CommitmentAndContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitment And Contingencies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_CommitmentAndContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitment And Contingencies [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PurchaseObligation" xlink:type="locator" xlink:label="us-gaap_PurchaseObligation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PurchaseObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory purchased</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PurchaseObligation" xlink:to="us-gaap_PurchaseObligation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PurchaseObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Obligation</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_SalesAndExciseTaxPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Sales tax payable current</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_NumberOfInstallments" xlink:type="locator" xlink:label="ater_NumberOfInstallments" />
    <link:label xml:lang="en-US" xlink:label="ater_NumberOfInstallments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of installments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_NumberOfInstallments" xlink:to="ater_NumberOfInstallments_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencySettlementAgreementDate" xlink:type="locator" xlink:label="us-gaap_LossContingencySettlementAgreementDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingencySettlementAgreementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agreement date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencySettlementAgreementDate" xlink:to="us-gaap_LossContingencySettlementAgreementDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingencySettlementAgreementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Settlement Agreement Date</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebt" xlink:type="locator" xlink:label="us-gaap_LongTermDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Payment to suppliers</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_NumberOfInstallments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of installments</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_NumberOfInstallments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Installments</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedFromOtherParty" xlink:type="locator" xlink:label="us-gaap_LitigationSettlementAmountAwardedFromOtherParty" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LitigationSettlementAmountAwardedFromOtherParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement received</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LitigationSettlementAmountAwardedFromOtherParty" xlink:to="us-gaap_LitigationSettlementAmountAwardedFromOtherParty_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LitigationSettlementAmountAwardedFromOtherParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Settlement Amount Awarded From Other Party</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidExpenseCurrent" xlink:type="locator" xlink:label="us-gaap_PrepaidExpenseCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid asset</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseCurrent" xlink:to="us-gaap_PrepaidExpenseCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty" xlink:type="locator" xlink:label="us-gaap_LitigationSettlementAmountAwardedToOtherParty" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LitigationSettlementAmountAwardedToOtherParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Litigation settlement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LitigationSettlementAmountAwardedToOtherParty" xlink:to="us-gaap_LitigationSettlementAmountAwardedToOtherParty_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LitigationSettlementAmountAwardedToOtherParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Settlement Amount Awarded To Other Party</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:type="locator" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Domestic</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Loss From Continuing Operations Before Income Taxes Domestic</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" xlink:type="locator" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">International</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Loss From Continuing Operations Before Income Taxes Foreign</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefitAbstract" xlink:type="locator" xlink:label="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefitAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefitAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefitAbstract" xlink:to="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefitAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefitAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current Federal State And Local Tax Expense Benefit [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentFederalTaxExpenseBenefit" xlink:to="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current Federal Tax Expense Benefit</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:to="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current State And Local Tax Expense Benefit</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentForeignTaxExpenseBenefit" xlink:to="us-gaap_CurrentForeignTaxExpenseBenefit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current Foreign Tax Expense Benefit</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current Income Tax Expense Benefit</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredFederalStateAndLocalTaxExpenseBenefitAbstract" xlink:type="locator" xlink:label="us-gaap_DeferredFederalStateAndLocalTaxExpenseBenefitAbstract" />
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    <link:loc xlink:href="ater-20211231.xsd#ater_DeferredTaxAssetsTaxDeferredExpenseInterestExpenseLimitation" xlink:type="locator" xlink:label="ater_DeferredTaxAssetsTaxDeferredExpenseInterestExpenseLimitation" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DeferredTaxAssetsTaxDeferredExpenseInterestExpenseLimitation" xlink:to="ater_DeferredTaxAssetsTaxDeferredExpenseInterestExpenseLimitation_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_DeferredTaxAssetsIntangibles" xlink:type="locator" xlink:label="ater_DeferredTaxAssetsIntangibles" />
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxAssetsIntangibles_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax assets intangibles.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DeferredTaxAssetsIntangibles" xlink:to="ater_DeferredTaxAssetsIntangibles_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_DeferredTaxAssetsFixedAssets" xlink:type="locator" xlink:label="ater_DeferredTaxAssetsFixedAssets" />
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxAssetsFixedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax assets fixed assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DeferredTaxAssetsFixedAssets" xlink:to="ater_DeferredTaxAssetsFixedAssets_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_DeferredTaxLiabilitiesContingentConsideration" xlink:type="locator" xlink:label="ater_DeferredTaxLiabilitiesContingentConsideration" />
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxLiabilitiesContingentConsideration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax liabilities contingent consideration.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DeferredTaxLiabilitiesContingentConsideration" xlink:to="ater_DeferredTaxLiabilitiesContingentConsideration_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_DeferredTaxLiabilitiesValuationAllowance" xlink:type="locator" xlink:label="ater_DeferredTaxLiabilitiesValuationAllowance" />
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxLiabilitiesValuationAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax liabilities valuation allowance.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DeferredTaxLiabilitiesValuationAllowance" xlink:to="ater_DeferredTaxLiabilitiesValuationAllowance_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_DeferredTaxLiabilitiesNetOfValuationAllowance" xlink:type="locator" xlink:label="ater_DeferredTaxLiabilitiesNetOfValuationAllowance" />
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxLiabilitiesNetOfValuationAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax liabilities net of valuation allowance.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DeferredTaxLiabilitiesNetOfValuationAllowance" xlink:to="ater_DeferredTaxLiabilitiesNetOfValuationAllowance_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsGrossAbstract" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsGrossAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsGrossAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax assets:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsGrossAbstract" xlink:to="us-gaap_DeferredTaxAssetsGrossAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsGrossAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Gross [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReturnsAndAllowances" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReturnsAndAllowances" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReturnsAndAllowances_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales returns reserve</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReturnsAndAllowances" xlink:to="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReturnsAndAllowances_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReturnsAndAllowances_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Returns And Allowances</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net operating loss carryforwards</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:to="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Operating Loss Carryforwards</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxAssetsStockOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock options</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxAssetsStockOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Stock Options</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsDeferredIncome" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsDeferredIncome" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsDeferredIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred revenue</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsDeferredIncome" xlink:to="us-gaap_DeferredTaxAssetsDeferredIncome_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsDeferredIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Deferred Income</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxAssetsTaxDeferredExpenseInterestExpenseLimitation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense limitation</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxAssetsTaxDeferredExpenseInterestExpenseLimitation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Tax Deferred Expense Interest Expense Limitation</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxAssetsIntangibles_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangibles</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxAssetsIntangibles_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Intangibles</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsOther" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsOther" xlink:to="us-gaap_DeferredTaxAssetsOther_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Other</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: valuation allowances</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Valuation Allowance</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net deferred tax assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Net</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxLiabilitiesAbstract" xlink:type="locator" xlink:label="us-gaap_DeferredTaxLiabilitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax liabilities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesAbstract" xlink:to="us-gaap_DeferredTaxLiabilitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxAssetsFixedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Fixed assets</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxAssetsFixedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Fixed Assets</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Goodwill</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Goodwill And Intangible Assets</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPrepaidExpenses" xlink:type="locator" xlink:label="us-gaap_DeferredTaxLiabilitiesPrepaidExpenses" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesPrepaidExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepaid Expenses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesPrepaidExpenses" xlink:to="us-gaap_DeferredTaxLiabilitiesPrepaidExpenses_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesPrepaidExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities Prepaid Expenses</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" xlink:type="locator" xlink:label="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Intangibles</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxLiabilitiesContingentConsideration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Contingent Consideration</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxLiabilitiesContingentConsideration_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities Contingent Consideration</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:type="locator" xlink:label="us-gaap_DeferredTaxLiabilitiesOther" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesOther" xlink:to="us-gaap_DeferredTaxLiabilitiesOther_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilitiesOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities Other</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxLiabilitiesValuationAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: valuation allowances</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxLiabilitiesValuationAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities Valuation Allowance</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxLiabilitiesNetOfValuationAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Net deferred tax liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DeferredTaxLiabilitiesNetOfValuationAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities Net Of Valuation Allowance</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:type="locator" xlink:label="us-gaap_DeferredTaxLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Net deferred tax assets (liabilities)</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_OperatingLossCarryForwardExpirationYear" xlink:type="locator" xlink:label="ater_OperatingLossCarryForwardExpirationYear" />
    <link:label xml:lang="en-US" xlink:label="ater_OperatingLossCarryForwardExpirationYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating loss carry forward expiration year.</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLossCarryforwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating loss carry forwards</link:label>
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    <link:label xml:lang="en-US" xlink:label="ater_OperatingLossCarryForwardExpirationYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating loss carry forwards expiration year</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_OperatingLossCarryForwardExpirationYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Loss Carry Forward Expiration Year</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLossCarryforwardsLimitationsOnUse" xlink:type="locator" xlink:label="us-gaap_OperatingLossCarryforwardsLimitationsOnUse" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLossCarryforwardsLimitationsOnUse_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of ownership limitations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLossCarryforwardsLimitationsOnUse" xlink:to="us-gaap_OperatingLossCarryforwardsLimitationsOnUse_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLossCarryforwardsLimitationsOnUse_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Loss Carryforwards Limitations On Use</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_PayrollRelatedCreditsCOVID19" xlink:type="locator" xlink:label="ater_PayrollRelatedCreditsCOVID19" />
    <link:label xml:lang="en-US" xlink:label="ater_PayrollRelatedCreditsCOVID19_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payroll related credits COVID19.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PayrollRelatedCreditsCOVID19" xlink:to="ater_PayrollRelatedCreditsCOVID19_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_PayrollRelatedCreditsCOVID19_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payroll related credits</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PayrollRelatedCreditsCOVID19_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payroll Related Credits C O V I D19</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_PercentageOfVotingPowerOfCapitalStockOutstanding" xlink:type="locator" xlink:label="ater_PercentageOfVotingPowerOfCapitalStockOutstanding" />
    <link:label xml:lang="en-US" xlink:label="ater_PercentageOfVotingPowerOfCapitalStockOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of voting power of capital stock outstanding.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PercentageOfVotingPowerOfCapitalStockOutstanding" xlink:to="ater_PercentageOfVotingPowerOfCapitalStockOutstanding_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Related Party Transactions By Related Party [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Related Party Transactions By Related Party [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="us-gaap_RelatedPartyTransactionDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_VotingAgreementMember" xlink:type="locator" xlink:label="ater_VotingAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="ater_VotingAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Voting agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_VotingAgreementMember" xlink:to="ater_VotingAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_VotingAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Voting Agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_VotingAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Voting Agreement [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PercentageOfVotingPowerOfCapitalStockOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of voting power of capital stock outstanding</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PercentageOfVotingPowerOfCapitalStockOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Voting Power Of Capital Stock Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted-average number of shares used in computing net loss per share, basic and diluted</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="locator" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Anti-dilutive shares excluded from computation of net loss per share (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationWorkingCapitalPaidRelatedToInventoryPurchased" xlink:type="locator" xlink:label="ater_BusinessCombinationWorkingCapitalPaidRelatedToInventoryPurchased" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationWorkingCapitalPaidRelatedToInventoryPurchased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination, working capital paid, related to inventory purchased.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationWorkingCapitalPaidRelatedToInventoryPurchased" xlink:to="ater_BusinessCombinationWorkingCapitalPaidRelatedToInventoryPurchased_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_MaximumPeriodAfterClosingDateToPayWorkingCapitalRelatedToInventoryPurchased" xlink:type="locator" xlink:label="ater_MaximumPeriodAfterClosingDateToPayWorkingCapitalRelatedToInventoryPurchased" />
    <link:label xml:lang="en-US" xlink:label="ater_MaximumPeriodAfterClosingDateToPayWorkingCapitalRelatedToInventoryPurchased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum period after closing date to pay working capital related to inventory purchased.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_MaximumPeriodAfterClosingDateToPayWorkingCapitalRelatedToInventoryPurchased" xlink:to="ater_MaximumPeriodAfterClosingDateToPayWorkingCapitalRelatedToInventoryPurchased_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_PromissoryNoteMember" xlink:type="locator" xlink:label="ater_PromissoryNoteMember" />
    <link:label xml:lang="en-US" xlink:label="ater_PromissoryNoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Promissory note.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PromissoryNoteMember" xlink:to="ater_PromissoryNoteMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_PromissoryNoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Promissory Note</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PromissoryNoteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Promissory Note [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CounterpartyNameAxis" xlink:type="locator" xlink:label="srt_CounterpartyNameAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_CounterpartyNameAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="locator" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Agreement Counterparty Name [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_SellersBrokersMember" xlink:type="locator" xlink:label="ater_SellersBrokersMember" />
    <link:label xml:lang="en-US" xlink:label="ater_SellersBrokersMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sellers brokers.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_SellersBrokersMember" xlink:to="ater_SellersBrokersMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_SellersBrokersMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sellers Brokers</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SellersBrokersMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sellers Brokers [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContingentConsiderationByTypeAxis" xlink:type="locator" xlink:label="us-gaap_ContingentConsiderationByTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContingentConsiderationByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent Consideration by Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContingentConsiderationByTypeAxis" xlink:to="us-gaap_ContingentConsiderationByTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContingentConsiderationByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Consideration By Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContingentConsiderationTypeDomain" xlink:type="locator" xlink:label="us-gaap_ContingentConsiderationTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContingentConsiderationTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent Consideration Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContingentConsiderationTypeDomain" xlink:to="us-gaap_ContingentConsiderationTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContingentConsiderationTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Consideration Type [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AfterFifteenMonthsFollowingClosingDateMember" xlink:type="locator" xlink:label="ater_AfterFifteenMonthsFollowingClosingDateMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AfterFifteenMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">After 15 Months Following Closing Date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AfterFifteenMonthsFollowingClosingDateMember" xlink:to="ater_AfterFifteenMonthsFollowingClosingDateMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AfterFifteenMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">After 15 Months Following Closing Date</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AfterFifteenMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">After Fifteen Months Following Closing Date [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByAssetClassAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueByAssetClassAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value By Asset Class [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember" xlink:type="locator" xlink:label="ater_InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember" />
    <link:label xml:lang="en-US" xlink:label="ater_InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Inventory and other working capital assets, including cash on hand.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember" xlink:to="ater_InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory and Other Working Capital Assets, Including Cash on Hand</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Inventory And Other Working Capital Assets Including Cash On Hand [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_YearOneEarnOutMember" xlink:type="locator" xlink:label="ater_YearOneEarnOutMember" />
    <link:label xml:lang="en-US" xlink:label="ater_YearOneEarnOutMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Year one earn-out.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_YearOneEarnOutMember" xlink:to="ater_YearOneEarnOutMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_YearOneEarnOutMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Year One Earn-Out</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_YearOneEarnOutMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Year One Earn Out [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_YearTwoEarnOutMember" xlink:type="locator" xlink:label="ater_YearTwoEarnOutMember" />
    <link:label xml:lang="en-US" xlink:label="ater_YearTwoEarnOutMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Year two earn-out.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_YearTwoEarnOutMember" xlink:to="ater_YearTwoEarnOutMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_YearTwoEarnOutMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Year Two Earn-Out</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_YearTwoEarnOutMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Year Two Earn Out [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementScenarioAxis" xlink:type="locator" xlink:label="srt_StatementScenarioAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementScenarioAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Scenario</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_StatementScenarioAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementScenarioAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Scenario [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioUnspecifiedDomain" xlink:type="locator" xlink:label="srt_ScenarioUnspecifiedDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Scenario</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioUnspecifiedDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Scenario Unspecified [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioForecastMember" xlink:type="locator" xlink:label="srt_ScenarioForecastMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioForecastMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forecast</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioForecastMember" xlink:to="srt_ScenarioForecastMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioForecastMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Scenario Forecast [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_NineMonthsFollowingClosingDateMember" xlink:type="locator" xlink:label="ater_NineMonthsFollowingClosingDateMember" />
    <link:label xml:lang="en-US" xlink:label="ater_NineMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Nine Months Following Closing Date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_NineMonthsFollowingClosingDateMember" xlink:to="ater_NineMonthsFollowingClosingDateMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_NineMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nine Months Following Closing Date</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_NineMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Nine Months Following Closing Date [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember" xlink:type="locator" xlink:label="ater_AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">After Nine Months But Before 12 Months Following Closing Date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember" xlink:to="ater_AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">After Nine Months But Before 12 Months Following Closing Date</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">After Nine Months But Before Twelve Months Following Closing Date [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember" xlink:type="locator" xlink:label="ater_AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember" />
    <link:label xml:lang="en-US" xlink:label="ater_AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">After 12 Months But Before 15 Months Following Closing Date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember" xlink:to="ater_AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">After12 Months But Before 15 Months Following Closing Date</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">After Twelve Months But Before Fifteen Months Following Closing Date [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember" xlink:type="locator" xlink:label="ater_EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember" />
    <link:label xml:lang="en-US" xlink:label="ater_EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Event occurs in twelve months ended twelve thirty one twenty twenty one.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember" xlink:to="ater_EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Event Occurs in 12 Months Ending 12/31/2021</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Event Occurs In Twelve Months Ended Twelve Thirty One Twenty Twenty One [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_EventOccursInSixMonthsFollowingClosingDateMember" xlink:type="locator" xlink:label="ater_EventOccursInSixMonthsFollowingClosingDateMember" />
    <link:label xml:lang="en-US" xlink:label="ater_EventOccursInSixMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Event occurs in six months following the closing date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_EventOccursInSixMonthsFollowingClosingDateMember" xlink:to="ater_EventOccursInSixMonthsFollowingClosingDateMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_EventOccursInSixMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Event Occurs in Six Months Following Closing Date</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_EventOccursInSixMonthsFollowingClosingDateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Event Occurs In Six Months Following Closing Date [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationConsiderationTransferred1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationConsiderationTransferred1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total consideration</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationConsiderationTransferred1" xlink:to="us-gaap_BusinessCombinationConsiderationTransferred1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationConsiderationTransferred1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Consideration Transferred1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total consideration paid by cash</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireBusinessesGross" xlink:to="us-gaap_PaymentsToAcquireBusinessesGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments To Acquire Businesses Gross</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consideration paid in form of unsecured promissory note</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred" xlink:to="us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Consideration Transferred Liabilities Incurred</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest rate per annum</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationWorkingCapitalPaidRelatedToInventoryPurchased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Working capital paid, related to inventory purchased within sixty days of closing</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationWorkingCapitalPaidRelatedToInventoryPurchased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Working Capital Paid Related To Inventory Purchased</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_MaximumPeriodAfterClosingDateToPayWorkingCapitalRelatedToInventoryPurchased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum period after closing date to pay working capital related to inventory purchased</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_MaximumPeriodAfterClosingDateToPayWorkingCapitalRelatedToInventoryPurchased_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Period After Closing Date To Pay Working Capital Related To Inventory Purchased</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedProductionDeposits" xlink:type="locator" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedProductionDeposits" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedProductionDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination recognized identifiable assets acquired and liabilities assumed production deposits.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedProductionDeposits" xlink:to="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedProductionDeposits_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherLiabilities" xlink:type="locator" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherLiabilities" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination recognized identifiable assets acquired and liabilities assumed current liabilities accounts payable and other liabilities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherLiabilities" xlink:to="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherLiabilities_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets by Major Class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets By Major Class [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets, Major Class Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Major Class Name [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TrademarksMember" xlink:type="locator" xlink:label="us-gaap_TrademarksMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TrademarksMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trademarks</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TrademarksMember" xlink:to="us-gaap_TrademarksMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TrademarksMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Trademarks [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Inventory</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Inventory</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Goodwill</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deferred tax liability</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Liabilities</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net assets acquired</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill" xlink:type="locator" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination, recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles and goodwill.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill" xlink:to="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncompeteAgreementsMember" xlink:type="locator" xlink:label="us-gaap_NoncompeteAgreementsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoncompeteAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-Competition Agreement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncompeteAgreementsMember" xlink:to="us-gaap_NoncompeteAgreementsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoncompeteAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noncompete Agreements [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransmissionServiceAgreementMember" xlink:type="locator" xlink:label="us-gaap_TransmissionServiceAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TransmissionServiceAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transition Services Agreement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TransmissionServiceAgreementMember" xlink:to="us-gaap_TransmissionServiceAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TransmissionServiceAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transmission Service Agreement [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_InventoryMember" xlink:type="locator" xlink:label="ater_InventoryMember" />
    <link:label xml:lang="en-US" xlink:label="ater_InventoryMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Inventory.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_InventoryMember" xlink:to="ater_InventoryMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_InventoryMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_InventoryMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Inventory [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_WorkingCapitalMember" xlink:type="locator" xlink:label="ater_WorkingCapitalMember" />
    <link:label xml:lang="en-US" xlink:label="ater_WorkingCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Working Capital.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_WorkingCapitalMember" xlink:to="ater_WorkingCapitalMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_WorkingCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Working Capital</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_WorkingCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Working Capital [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:type="locator" xlink:label="us-gaap_CustomerRelationshipsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Relations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CustomerRelationshipsMember" xlink:to="us-gaap_CustomerRelationshipsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Customer Relationships [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentMember" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PP&amp;E</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentMember" xlink:to="us-gaap_PropertyPlantAndEquipmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment [Member]</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_RealPropertyMember" xlink:type="locator" xlink:label="ater_RealPropertyMember" />
    <link:label xml:lang="en-US" xlink:label="ater_RealPropertyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Real property.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_RealPropertyMember" xlink:to="ater_RealPropertyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_RealPropertyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Real Property</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_RealPropertyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Real Property [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net intangible assets</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Finite Lived Intangibles And Goodwill</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:type="locator" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Useful life (in years)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:to="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Acquired Finite Lived Intangible Assets Weighted Average Useful Life</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_DebtInstrumentDateOfSecondRequiredPayment" xlink:type="locator" xlink:label="ater_DebtInstrumentDateOfSecondRequiredPayment" />
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentDateOfSecondRequiredPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument date of second required payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DebtInstrumentDateOfSecondRequiredPayment" xlink:to="ater_DebtInstrumentDateOfSecondRequiredPayment_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_DebtInstrumentDateOfThirdRequiredPayment" xlink:type="locator" xlink:label="ater_DebtInstrumentDateOfThirdRequiredPayment" />
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentDateOfThirdRequiredPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument date of third required payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DebtInstrumentDateOfThirdRequiredPayment" xlink:to="ater_DebtInstrumentDateOfThirdRequiredPayment_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Date of completion of Acquisition</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1" xlink:to="us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Effective Date Of Acquisition1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentPeriodicPayment" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentPeriodicPayment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentPeriodicPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal amount and accrued interest payments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentPeriodicPayment" xlink:to="us-gaap_DebtInstrumentPeriodicPayment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentPeriodicPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Periodic Payment</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentDateOfFirstRequiredPayment1" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">First principal amount and accrued interest payments due date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1" xlink:to="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Date Of First Required Payment1</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentDateOfSecondRequiredPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Second principal amount and accrued interest payments due date</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentDateOfSecondRequiredPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Date Of Second Required Payment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentDateOfThirdRequiredPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Third principal amount and accrued interest payments due date</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DebtInstrumentDateOfThirdRequiredPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Date Of Third Required Payment</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationConsiderationTransferredValueOfCertainInventory" xlink:type="locator" xlink:label="ater_BusinessCombinationConsiderationTransferredValueOfCertainInventory" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationConsiderationTransferredValueOfCertainInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination consideration transferred value of certain inventory.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationConsiderationTransferredValueOfCertainInventory" xlink:to="ater_BusinessCombinationConsiderationTransferredValueOfCertainInventory_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination, consideration transferred, common stock issued</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued" xlink:to="us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionSharePrice" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionSharePrice" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionSharePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Closing stock price</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionSharePrice" xlink:to="us-gaap_BusinessAcquisitionSharePrice_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionSharePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Share Price</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationConsiderationTransferredValueOfCertainInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Value of certain inventory</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationConsiderationTransferredValueOfCertainInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Consideration Transferred Value Of Certain Inventory</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedProductionDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Production deposits</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedProductionDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Production Deposits</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">AP and other liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayableAndOtherLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Accounts Payable And Other Liabilities</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Preliminary allocation of purchase price to assets acquired and liabilities assumed</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_WithheldOfCashPurchasePriceToServeCollateralForSellersPayment" xlink:type="locator" xlink:label="ater_WithheldOfCashPurchasePriceToServeCollateralForSellersPayment" />
    <link:label xml:lang="en-US" xlink:label="ater_WithheldOfCashPurchasePriceToServeCollateralForSellersPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Withheld of cash purchase price to serve collateral for sellers payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_WithheldOfCashPurchasePriceToServeCollateralForSellersPayment" xlink:to="ater_WithheldOfCashPurchasePriceToServeCollateralForSellersPayment_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_WithheldOfCashPurchasePricePaymentPeriod" xlink:type="locator" xlink:label="ater_WithheldOfCashPurchasePricePaymentPeriod" />
    <link:label xml:lang="en-US" xlink:label="ater_WithheldOfCashPurchasePricePaymentPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Withheld of cash purchase price payment period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_WithheldOfCashPurchasePricePaymentPeriod" xlink:to="ater_WithheldOfCashPurchasePricePaymentPeriod_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Payment in cash</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_WithheldOfCashPurchasePriceToServeCollateralForSellersPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Withheld of cash purchase price to serve collateral for sellers payment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_WithheldOfCashPurchasePriceToServeCollateralForSellersPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Withheld Of Cash Purchase Price To Serve Collateral For Sellers Payment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_WithheldOfCashPurchasePricePaymentPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Withheld of cash purchase price payment period</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_WithheldOfCashPurchasePricePaymentPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Withheld Of Cash Purchase Price Payment Period</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_EntitledToReceiveNumberOfSharesOfCommonStock" xlink:type="locator" xlink:label="ater_EntitledToReceiveNumberOfSharesOfCommonStock" />
    <link:label xml:lang="en-US" xlink:label="ater_EntitledToReceiveNumberOfSharesOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Entitled to receive number of shares of common stock.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_EntitledToReceiveNumberOfSharesOfCommonStock" xlink:to="ater_EntitledToReceiveNumberOfSharesOfCommonStock_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_EntitledToReceiveNumberOfSharesOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entitled to receive number of shares of common stock</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_EntitledToReceiveNumberOfSharesOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entitled To Receive Number Of Shares Of Common Stock</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationAcquiredReceivablesDescription" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationAcquiredReceivablesDescription" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationAcquiredReceivablesDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination, acquired receivables, description</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationAcquiredReceivablesDescription" xlink:to="us-gaap_BusinessCombinationAcquiredReceivablesDescription_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationAcquiredReceivablesDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Acquired Receivables Description</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued" xlink:type="locator" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination recognized identifiable assets acquired and liabilities assumed common stock shares issued.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued" xlink:to="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash purchase price</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares of common stock issued</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Common Stock Shares Issued</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated earnout liability</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Contingent Liability</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total consideration to be paid</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Business acquisition shares issued</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_ContingentConsiderationEarnOutPayments" xlink:type="locator" xlink:label="ater_ContingentConsiderationEarnOutPayments" />
    <link:label xml:lang="en-US" xlink:label="ater_ContingentConsiderationEarnOutPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Contingent consideration earn-out payments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_ContingentConsiderationEarnOutPayments" xlink:to="ater_ContingentConsiderationEarnOutPayments_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_PaymentForTransitionServices" xlink:type="locator" xlink:label="ater_PaymentForTransitionServices" />
    <link:label xml:lang="en-US" xlink:label="ater_PaymentForTransitionServices_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment for transition services.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_PaymentForTransitionServices" xlink:to="ater_PaymentForTransitionServices_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business acquisition, inventory acquired</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ContingentConsiderationEarnOutPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business acquisition, earn-out payments</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ContingentConsiderationEarnOutPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Consideration Earn Out Payments</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PaymentForTransitionServices_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business acquisition, payment for transition services</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_PaymentForTransitionServices_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payment For Transition Services</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments" xlink:type="locator" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination, recognized identifiable assets acquired and liabilities assumed transition services payments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments" xlink:to="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transition services payments</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Transition Services Payments</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Business acquisition, assets acquired</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock issued</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment" xlink:type="locator" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination, recognized identifiable assets acquired and liabilities assumed, working capital adjustment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment" xlink:to="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Working capital adjustment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Working Capital Adjustment</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax liability</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net revenue as reported</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net revenue</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" xlink:to="us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionsProFormaRevenue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionsProFormaRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net revenue pro forma</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:to="us-gaap_BusinessAcquisitionsProFormaRevenue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionsProFormaRevenue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisitions Pro Forma Revenue</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating loss as reported</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual" xlink:to="us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Pro Forma Information Earnings Or Loss Of Acquiree Since Acquisition Date Actual</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating loss (income) pro forma</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax" xlink:to="us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating income (loss)</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationContingentConsiderationContributionMarginRatio" xlink:type="locator" xlink:label="ater_BusinessCombinationContingentConsiderationContributionMarginRatio" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationContributionMarginRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination contingent consideration contribution margin ratio.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationContingentConsiderationContributionMarginRatio" xlink:to="ater_BusinessCombinationContingentConsiderationContributionMarginRatio_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationContingentConsiderationEarnOutMargin" xlink:type="locator" xlink:label="ater_BusinessCombinationContingentConsiderationEarnOutMargin" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEarnOutMargin_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination contingent consideration earn out margin.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationContingentConsiderationEarnOutMargin" xlink:to="ater_BusinessCombinationContingentConsiderationEarnOutMargin_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum" xlink:type="locator" xlink:label="ater_BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination contingent consideration arrangements earn out maximum.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum" xlink:to="ater_BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationContributionMarginRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination contingent consideration contribution margin ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationContributionMarginRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Contribution Margin Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEarnOutMargin_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination contingent consideration earn out margin</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEarnOutMargin_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Earn Out Margin</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination, contingent consideration earn out amount, minimum</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow" xlink:to="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Arrangements Range Of Outcomes Value Low</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination, contingent consideration earn out amount, maximum</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh" xlink:to="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination contingent consideration arrangements earn out maximum</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Arrangements Earn Out Maximum</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationContingentConsiderationEarnOutGeneratedAmount" xlink:type="locator" xlink:label="ater_BusinessCombinationContingentConsiderationEarnOutGeneratedAmount" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEarnOutGeneratedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination contingent consideration earn out generated amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationContingentConsiderationEarnOutGeneratedAmount" xlink:to="ater_BusinessCombinationContingentConsiderationEarnOutGeneratedAmount_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationContingentConsiderationSubjectToCap" xlink:type="locator" xlink:label="ater_BusinessCombinationContingentConsiderationSubjectToCap" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationSubjectToCap_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination contingent consideration subject to cap.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationContingentConsiderationSubjectToCap" xlink:to="ater_BusinessCombinationContingentConsiderationSubjectToCap_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares" xlink:type="locator" xlink:label="ater_BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination contingent consideration entitled to receive amount in cash equal to shares.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares" xlink:to="ater_BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEarnOutGeneratedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination contingent consideration earn out generated amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEarnOutGeneratedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Earn Out Generated Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationSubjectToCap_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination contingent consideration subject to cap</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationSubjectToCap_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Subject To Cap</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination contingent consideration entitled to receive amount in cash equal to shares</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Entitled To Receive Amount In Cash Equal To Shares</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationContingentConsiderationEarnoutFairValue" xlink:type="locator" xlink:label="ater_BusinessCombinationContingentConsiderationEarnoutFairValue" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEarnoutFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination contingent consideration earnout fair value.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationContingentConsiderationEarnoutFairValue" xlink:to="ater_BusinessCombinationContingentConsiderationEarnoutFairValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Acquisition date, initial fair value anoint of earn-out payment</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEarnoutFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination contingent consideration earnout fair value</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationEarnoutFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Earnout Fair Value</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationContingentConsiderationLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationContingentConsiderationLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business combination, contingent consideration earn out amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:to="us-gaap_BusinessCombinationContingentConsiderationLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationContingentConsiderationLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Liability</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_AcquisitionDateFairValueOfContingentEarnOutLiabilitiesAndInventoryToBeSettledInShares" xlink:type="locator" xlink:label="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilitiesAndInventoryToBeSettledInShares" />
    <link:label xml:lang="en-US" xlink:label="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilitiesAndInventoryToBeSettledInShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Acquisition date fair value of contingent earn-out liabilities and inventory to be settled in shares.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilitiesAndInventoryToBeSettledInShares" xlink:to="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilitiesAndInventoryToBeSettledInShares_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities" xlink:type="locator" xlink:label="ater_BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities" />
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination contingent consideration change in fair value of contingent earn-out liabilities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities" xlink:to="ater_BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationContingentConsiderationLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning Balance</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilitiesAndInventoryToBeSettledInShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquisition date fair value of contingent earn-out liabilities and inventory to be settled in shares</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilitiesAndInventoryToBeSettledInShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Acquisition Date Fair Value Of Contingent Earn Out Liabilities And Inventory To Be Settled In Shares</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of contingent earn-out liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Contingent Consideration Change In Fair Value Of Contingent Earn Out Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_ContingentConsiderationEarnOutPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payment of contingent earn-out liability</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationContingentConsiderationLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_CommonStockEarnOutPayments" xlink:type="locator" xlink:label="ater_CommonStockEarnOutPayments" />
    <link:label xml:lang="en-US" xlink:label="ater_CommonStockEarnOutPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock earn out payments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_CommonStockEarnOutPayments" xlink:to="ater_CommonStockEarnOutPayments_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_CommonStockEarnOutPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock earn-out payments</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_CommonStockEarnOutPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Earn Out Payments</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_SettlementChargeOfContingentEarnoutLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Settlement charge of contingent earn-out liability</link:label>
    <link:loc xlink:href="ater-20211231.xsd#ater_DisclosureOfGoodwillAndIntangibleAssetsLineItems" xlink:type="locator" xlink:label="ater_DisclosureOfGoodwillAndIntangibleAssetsLineItems" />
    <link:label xml:lang="en-US" xlink:label="ater_DisclosureOfGoodwillAndIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of goodwill and intangible assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DisclosureOfGoodwillAndIntangibleAssetsLineItems" xlink:to="ater_DisclosureOfGoodwillAndIntangibleAssetsLineItems_lbl" />
    <link:loc xlink:href="ater-20211231.xsd#ater_DisclosureOfGoodwillAndIntangibleAssetsTable" xlink:type="locator" xlink:label="ater_DisclosureOfGoodwillAndIntangibleAssetsTable" />
    <link:label xml:lang="en-US" xlink:label="ater_DisclosureOfGoodwillAndIntangibleAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of goodwill and intangible assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ater_DisclosureOfGoodwillAndIntangibleAssetsTable" xlink:to="ater_DisclosureOfGoodwillAndIntangibleAssetsTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="ater_DisclosureOfGoodwillAndIntangibleAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disclosure Of Goodwill And Intangible Assets [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DisclosureOfGoodwillAndIntangibleAssetsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Goodwill And Intangible Assets [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillMember" xlink:type="locator" xlink:label="us-gaap_GoodwillMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillMember" xlink:to="us-gaap_GoodwillMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:type="locator" xlink:label="us-gaap_OtherIntangibleAssetsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherIntangibleAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherIntangibleAssetsMember" xlink:to="us-gaap_OtherIntangibleAssetsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherIntangibleAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Intangible Assets [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DisclosureOfGoodwillAndIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disclosure Of Goodwill And Intangible Assets [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="ater_DisclosureOfGoodwillAndIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disclosure Of Goodwill And Intangible Assets [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillGross" xlink:type="locator" xlink:label="us-gaap_GoodwillGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Gross Carrying Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillGross" xlink:to="us-gaap_GoodwillGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Gross</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:type="locator" xlink:label="us-gaap_GoodwillAcquiredDuringPeriod" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillAcquiredDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillAcquiredDuringPeriod" xlink:to="us-gaap_GoodwillAcquiredDuringPeriod_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillAcquiredDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Acquired During Period</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Gross Carrying Amount</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" xlink:type="locator" xlink:label="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill Impairments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" xlink:to="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill Impaired Accumulated Impairment Loss</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Net Book Value</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Gross Carrying Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsGross" xlink:to="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Gross</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1" xlink:type="locator" xlink:label="us-gaap_FinitelivedIntangibleAssetsAcquired1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinitelivedIntangibleAssetsAcquired1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinitelivedIntangibleAssetsAcquired1" xlink:to="us-gaap_FinitelivedIntangibleAssetsAcquired1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinitelivedIntangibleAssetsAcquired1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finitelived Intangible Assets Acquired1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived" xlink:type="locator" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsFinitelived" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsFinitelived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairmentOfIntangibleAssetsFinitelived" xlink:to="us-gaap_ImpairmentOfIntangibleAssetsFinitelived_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsFinitelived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impairment Of Intangible Assets Finitelived</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Gross Carrying Amount</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated Amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Accumulated Amortization</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Net Book Value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNet" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Net</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" />
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