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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-02-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001652044</issuerCik>
        <issuerName>Alphabet Inc.</issuerName>
        <issuerTradingSymbol>GOOG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001198046</rptOwnerCik>
            <rptOwnerName>HENNESSY JOHN L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ALPHABET INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1600 AMPHITHEATRE PKWY</rptOwnerStreet2>
            <rptOwnerCity>MOUNTAIN VIEW</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94043</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <value>Class A Common Stock</value>
            </securityTitle>
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                </transactionPricePerShare>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
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                    <value>I</value>
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                <natureOfOwnership>
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                </transactionShares>
                <transactionPricePerShare>
                    <value>2844.27</value>
                    <footnoteId id="F12"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2249</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2022-02-09</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>25</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2819.27</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2224</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,812.07 to $2,812.62, inclusive. The Reporting Person undertakes to provide to any security holder of Alphabet Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) through (12) to this Form 4.</footnote>
        <footnote id="F2">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,813.10 to $2,813.69, inclusive.</footnote>
        <footnote id="F3">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,815.13 to $2,815.95, inclusive.</footnote>
        <footnote id="F4">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,816.66 to $2,816.83, inclusive.</footnote>
        <footnote id="F5">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,817.22 to $2,817.78, inclusive.</footnote>
        <footnote id="F6">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,818.15 to $2,818.91, inclusive.</footnote>
        <footnote id="F7">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,819.63 to $2,820.37, inclusive.</footnote>
        <footnote id="F8">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,821.08 to $2,821.94, inclusive.</footnote>
        <footnote id="F9">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,825.92 to $2,826.75, inclusive.</footnote>
        <footnote id="F10">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,829.08 to $2,829.89, inclusive.</footnote>
        <footnote id="F11">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,843.18 to $2,843.67, inclusive.</footnote>
        <footnote id="F12">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2,844.24 to $2,844.23, inclusive.</footnote>
    </footnotes>

    <remarks>This Form 4 is one out of two Form 4s filed to report transactions dated February 9, 2022. All transactions were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person.</remarks>

    <ownerSignature>
        <signatureName>/s/ Valentina Margulis, as Attorney-in-Fact for John L. Hennessy</signatureName>
        <signatureDate>2022-02-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
