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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2022-03-28</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001826000</issuerCik>
        <issuerName>Latch, Inc.</issuerName>
        <issuerTradingSymbol>LTCH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001920142</rptOwnerCik>
            <rptOwnerName>Schaeffer Barry</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LATCH, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>508 WEST 26TH STREET, SUITE 6G</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10001</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Interim CFO &amp; Treasurer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>143720</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents (i) 45,489 restricted stock units (&quot;RSUs&quot;) granted to the reporting person on August 9, 2021, one-third of which vest on August 2, 2022, and the remainder of which vest quarterly thereafter in eight equal installments; (ii) 78,585 RSUs granted to the reporting person on February 22, 2022, which vest quarterly in 12 equal installments over a three-year period with an initial vesting date of April 1, 2022; and (iii) 19,646 RSUs granted to the reporting person on March 14, 2022, which vest quarterly in 12 equal installments over a three-year period with an initial vesting date of April 1, 2022.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Priyen Patel</signatureName>
        <signatureDate>2022-04-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
