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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2018-02-07</periodOfReport>

    <dateOfOriginalSubmission>2018-02-09</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001564408</issuerCik>
        <issuerName>Snap Inc</issuerName>
        <issuerTradingSymbol>SNAP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001606115</rptOwnerCik>
            <rptOwnerName>Lynton Michael</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SNAP INC.</rptOwnerStreet1>
            <rptOwnerStreet2>2772 DONALD DOUGLAS LOOP NORTH</rptOwnerStreet2>
            <rptOwnerCity>SANTA MONICA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90405</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-02-07</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>8970</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2265941</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Lynton Asset LP</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Pro rata distribution from Benchmark Capital Partners VII, L.P., of which the reporting person is a limited partner.</footnote>
        <footnote id="F2">The Form 4, as originally filed on February 9, 2018, incorrectly reported a balance of 2,270,311 shares.</footnote>
        <footnote id="F3">The reporting person is trustee of the Lynton Asset LP. The reporting person disclaims beneficial ownership in these shares except as to the reporting person's pecuniary interest therein.</footnote>
    </footnotes>

    <remarks>This amended Form 4 filed is to correct the reporting person's ownership of Class A Common Stock with respect to the above entity. No other changes have been made to the original Form 4.</remarks>

    <ownerSignature>
        <signatureName>/s/ Atul Porwal, Attorney-in-fact</signatureName>
        <signatureDate>2019-07-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
