<?xml version="1.0" encoding="us-ascii"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2021-08-09T05:10:49.7126925+00:00 -->
<!-- Version            : 5.0.1.648 -->
<!-- Package ID         : edf42fc9e98c4f2089d9c2ed500c22d1 -->
<!-- Copyright (c) 2021 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="ater_HeatingCoolingAndAirQualityMember" name="HeatingCoolingAndAirQualityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_KitchenAppliancesMember" name="KitchenAppliancesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_HealthAndBeautyMember" name="HealthAndBeautyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_PersonalProtectiveEquipmentMember" name="PersonalProtectiveEquipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_CookwareKitchenToolsAndGadgetsMember" name="CookwareKitchenToolsAndGadgetsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_HomeOfficeMember" name="HomeOfficeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_HousewaresMember" name="HousewaresMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_EssentialOilsAndRelatedAccessoriesMember" name="EssentialOilsAndRelatedAccessoriesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_OtherMember" name="OtherMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_WarrantLiabilityMember" name="WarrantLiabilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_ContingentEarnOutConsiderationMember" name="ContingentEarnOutConsiderationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_RestrictedCashMember" name="RestrictedCashMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_ChangeInFairMarketValueOfWarrantLiabilityMember" name="ChangeInFairMarketValueOfWarrantLiabilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_ChangeInFairValueOfDerivativeLiabilityMember" name="ChangeInFairValueOfDerivativeLiabilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_PrepaidInventory" name="PrepaidInventory" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="ater_AccruedLogisticsCostsCurrent" name="AccruedLogisticsCostsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_ProductRelatedAccruals" name="ProductRelatedAccruals" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_SalesReturnReserve" name="SalesReturnReserve" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_InsuranceFinancing" name="InsuranceFinancing" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_AccruedFulfillmentExpense" name="AccruedFulfillmentExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_LinesOfCreditGrossCurrent" name="LinesOfCreditGrossCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_DiscountAssociatedWithIssuanceOfWarrantsCurrent" name="DiscountAssociatedWithIssuanceOfWarrantsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="ater_LoansPayableIncludingDerivativeLiabilityRelatedToTermLoan" name="LoansPayableIncludingDerivativeLiabilityRelatedToTermLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_DerivativeLiabilityRelatedToTermLoan" name="DerivativeLiabilityRelatedToTermLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount" name="LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_DebtOffsetAgainstAndExpenseOverTerm" name="DebtOffsetAgainstAndExpenseOverTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_SeniorSecuredNoteMember" name="SeniorSecuredNoteMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_TerminatedCreditAgreementMember" name="TerminatedCreditAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_HorizonTermLoanMember" name="HorizonTermLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_ZeroPercentageCouponSeniorSecuredPromissoryNoteMember" name="ZeroPercentageCouponSeniorSecuredPromissoryNoteMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_SecuritiesPurchaseAgreementMember" name="SecuritiesPurchaseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_HighTrailDecember2020AndFebruary2021NoteMember" name="HighTrailDecember2020AndFebruary2021NoteMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_SeniorSecuredPromissoryNotesMember" name="SeniorSecuredPromissoryNotesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_HighTrailLoanMember" name="HighTrailLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_DecemberWarrantMember" name="DecemberWarrantMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_HighTrailLetterAgreementMember" name="HighTrailLetterAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_PennyWarrantMember" name="PennyWarrantMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_HighTrailAmendmentsMember" name="HighTrailAmendmentsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_AprilLetterAgreementMember" name="AprilLetterAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_SPAAmendmentMember" name="SPAAmendmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_FebruaryWarrantPennyWarrantAndAdditionalWarrantMember" name="FebruaryWarrantPennyWarrantAndAdditionalWarrantMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand" name="LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="ater_PrepaymentFeePercentage" name="PrepaymentFeePercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_LineOfCreditFacilityAndTermLoanInterestExpense" name="LineOfCreditFacilityAndTermLoanInterestExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="ater_DebtInstrumentMaturityMonthAndYear" name="DebtInstrumentMaturityMonthAndYear" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_LineOfCreditFacilityAggregatePrincipalAmount" name="LineOfCreditFacilityAggregatePrincipalAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_LineOfCreditFacilityNumberOfInstallments" name="LineOfCreditFacilityNumberOfInstallments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand" name="LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="ater_ClassOfWarrantsOrRightsExercisableTerm" name="ClassOfWarrantsOrRightsExercisableTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_ClassOfWarrantExercisableToCommonStockPercentage" name="ClassOfWarrantExercisableToCommonStockPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays" name="ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_ClassOfWarrantsOrRightsFairValueOnIssuance" name="ClassOfWarrantsOrRightsFairValueOnIssuance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="ater_ExerciseOfCommonStockSubjectToWarrantShares" name="ExerciseOfCommonStockSubjectToWarrantShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_PaymentForExerciseOfWarrantShares" name="PaymentForExerciseOfWarrantShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_PercentOfAverageDailyTradingVolume" name="PercentOfAverageDailyTradingVolume" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_ExerciseOfWarrantsForCommonStockSharesIssued" name="ExerciseOfWarrantsForCommonStockSharesIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_BeneficialOwnershipLimitPercentage" name="BeneficialOwnershipLimitPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_WarrantAmendmentConditionDescription" name="WarrantAmendmentConditionDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_ReclassificationFromLiabilityToComponentOfEquity" name="ReclassificationFromLiabilityToComponentOfEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_AterianTwoThousandFourteenPlanMember" name="AterianTwoThousandFourteenPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_TwoThousandEighteenEquityIncentivePlanMember" name="TwoThousandEighteenEquityIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_FirstAnniversaryMember" name="FirstAnniversaryMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_OverThirtySixMonthsMember" name="OverThirtySixMonthsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_OverTwentyFourMonthsMember" name="OverTwentyFourMonthsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_TwoThousandNineteenEquityPlanMember" name="TwoThousandNineteenEquityPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_ShareBasedCompensationAwardsTrancheFourMember" name="ShareBasedCompensationAwardsTrancheFourMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_SalesAndDistributionExpensesMember" name="SalesAndDistributionExpensesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_CommitmentAndContingenciesLineItems" name="CommitmentAndContingenciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_CommitmentAndContingenciesTable" name="CommitmentAndContingenciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_SettlementAgreementMember" name="SettlementAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_FirstPaymentMember" name="FirstPaymentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_SecondPaymentMember" name="SecondPaymentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_ThirdPaymentMember" name="ThirdPaymentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_NumberOfInstallments" name="NumberOfInstallments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_WithheldOfCashPurchasePriceToServeCollateralForSellersPayment" name="WithheldOfCashPurchasePriceToServeCollateralForSellersPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_WithheldOfCashPurchasePricePaymentPeriod" name="WithheldOfCashPurchasePricePaymentPeriod" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_EntitledToReceiveNumberOfSharesOfCommonStock" name="EntitledToReceiveNumberOfSharesOfCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_AfterFifteenMonthsFollowingClosingDateMember" name="AfterFifteenMonthsFollowingClosingDateMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember" name="InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_SellersBrokersMember" name="SellersBrokersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_SmashAssetsMember" name="SmashAssetsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_YearOneEarnOutMember" name="YearOneEarnOutMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_YearTwoEarnOutMember" name="YearTwoEarnOutMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_NineMonthsFollowingClosingDateMember" name="NineMonthsFollowingClosingDateMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember" name="AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember" name="AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember" name="EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_EventOccursInSixMonthsFollowingClosingDateMember" name="EventOccursInSixMonthsFollowingClosingDateMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="ater_InventoryMember" name="InventoryMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_WorkingCapitalMember" name="WorkingCapitalMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_RealPropertyMember" name="RealPropertyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_ContingentConsiderationEarnOutPayments" name="ContingentConsiderationEarnOutPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_PaymentForTransitionServices" name="PaymentForTransitionServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_BusinessCombinationConsiderationTransferredValueOfCertainInventory" name="BusinessCombinationConsiderationTransferredValueOfCertainInventory" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_BusinessCombinationContingentConsiderationContributionMarginRatio" name="BusinessCombinationContingentConsiderationContributionMarginRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_BusinessCombinationContingentConsiderationEarnOutMargin" name="BusinessCombinationContingentConsiderationEarnOutMargin" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum" name="BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_BusinessCombinationContingentConsiderationEarnOutGeneratedAmount" name="BusinessCombinationContingentConsiderationEarnOutGeneratedAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_BusinessCombinationContingentConsiderationSubjectToCap" name="BusinessCombinationContingentConsiderationSubjectToCap" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares" name="BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilities" name="AcquisitionDateFairValueOfContingentEarnOutLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_BusinessCombinationContingentConsiderationEarnoutFairValue" name="BusinessCombinationContingentConsiderationEarnoutFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_AcquisitionDateFairValueOfContingentEarnOutLiabilitiesAndInventoryToBeSettledInShares" name="AcquisitionDateFairValueOfContingentEarnOutLiabilitiesAndInventoryToBeSettledInShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities" name="BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="ater_GoodwillDisclosureAbstract" name="GoodwillDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_AcceleratedPrincipalAmount" name="AcceleratedPrincipalAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_RepaymentsOfDebtAfterAcceleratedPrincipalAddition" name="RepaymentsOfDebtAfterAcceleratedPrincipalAddition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_LetterAgreementsMember" name="LetterAgreementsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_HighTrailAprilTwoThousandAndTwentyOneNotesMember" name="HighTrailAprilTwoThousandAndTwentyOneNotesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="ater_BasePercentageOfLessorsUsedToCalculateCurrentEventOfDefaultAcceleration" name="BasePercentageOfLessorsUsedToCalculateCurrentEventOfDefaultAcceleration" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment" name="DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_PaymentInCashOfCurrentEventOfDefaultAccelerationAmount" name="PaymentInCashOfCurrentEventOfDefaultAccelerationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount" name="PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="ater_WarrantToPurchaseAggregateSharesCommonStock" name="WarrantToPurchaseAggregateSharesCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="ater_WarrantsPriorToDay" name="WarrantsPriorToDay" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
</xsd:schema>
