<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-03-08</periodOfReport>

    <notSubjectToSection16>false</notSubjectToSection16>

    <issuer>
        <issuerCik>0001580864</issuerCik>
        <issuerName>Vroom, Inc.</issuerName>
        <issuerTradingSymbol>VRM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001461101</rptOwnerCik>
            <rptOwnerName>Shortt Thomas H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O VROOM, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>3600 W SAM HOUSTON PKWY S, FLOOR 4</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77042</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>true</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2024-03-08</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2250.00</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>41910.00</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Represents an award of restricted stock units that fifty percent of the RSUs will vest in full on March 19, 2025 and fifty percent of the RSUs will vest in full on March 20, 2025, subject to the reporting person's continued employment. Each restricted stock unit represents a contingent right to receive one share of Common Stock of the Issuer.</footnote>
        <footnote id="F2">On March 8, 2024, the board of directors of the Issuer amended the vesting schedule applicable to the award of (i) 3,268 restricted stock units originally granted on January 3, 2022, the unvested units of which will now vest 50% on March 19, 2025 and 50% on March 20, 2025; (ii) 15,000 restricted stock units originally granted on May 9, 2022, which will now vest 50% on March 19, 2025 and 50% on March 20, 2025; and (iii) 22,500 restricted stock units originally granted on March 20, 2023, which will now vest 50% on March 19, 2025 and 50% on March 20, 2025. Each restricted stock unit represents a contingent right to receive one share of Common Stock of the Issuer.</footnote>
        <footnote id="F3">The number of securities reported herein reflects the effects of a 1-for-80 reverse stock split effected by the Issuer on February 13, 2024, which was exempt from reporting pursuant to Rule 16a-9.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Alison Klein, Attorney-in-Fact for Thomas H. Shortt</signatureName>
        <signatureDate>2024-03-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
