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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-09-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001328015</issuerCik>
        <issuerName>Imprivata Inc</issuerName>
        <issuerTradingSymbol>IMPR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001114126</rptOwnerCik>
            <rptOwnerName>POLARIS VENTURE MANAGEMENT CO III LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 WINTER STREET, SUITE 3350</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WALTHAM</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02451</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001114889</rptOwnerCik>
            <rptOwnerName>POLARIS VENTURE PARTNERS ENTREPRENEURS FUND III LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 WINTER STREET, SUITE 3350</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WALTHAM</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02451</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001114437</rptOwnerCik>
            <rptOwnerName>POLARIS VENTURE PARTNERS FOUNDERS FUND III LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 WINTER STREET, SUITE 3350</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WALTHAM</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02451</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001104639</rptOwnerCik>
            <rptOwnerName>POLARIS VENTURE PARTNERS III LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 WINTER STREET, SUITE 3350</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WALTHAM</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02451</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2016-09-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>69076</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2016-09-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>42002</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2016-09-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2686498</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F4"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Disposed of pursuant to the Agreement and Plan of Merger between the Issuer, Project Brady Merger Sub, Inc. and Project Brady Holdings, LLC (the &quot;Merger Agreement&quot;), whereby, at the effective time of the merger contemplated therein (the &quot;Effective Time&quot;), all issued and outstanding shares of the Issuer's common stock were converted into the right to receive $19.25 per share in cash and, when so converted, automatically cancelled.</footnote>
        <footnote id="F2">The shares are held directly by Polaris Venture Partners Entrepreneurs' Fund III, L.P. Polaris Venture Management Co. III, L.L.C. (&quot;PVM&quot;) is the general partner of Polaris Venture Partners Entrepreneurs' Fund III, L.P.   and has the voting and investment power over these shares and may be deemed the indirect beneficial owner of these shares. The Reporting Persons disclaim beneficial ownership of these shares, except to the extent of their pecuniary interests therein, and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of such securities for Section 16 or any other purpose.</footnote>
        <footnote id="F3">The shares are held directly by Polaris Venture Partners Founders' Fund III, L.P. PVM is the general partner of Polaris Venture Partners Founders' Fund III, L.P.   and has the voting and investment power over these shares and may be deemed the indirect beneficial owner of these shares. The Reporting Persons disclaim beneficial ownership of these shares, except to the extent of their pecuniary interests therein, and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of such securities for Section 16 or any other purpose.</footnote>
        <footnote id="F4">The shares are held directly by Polaris Venture Partners III, L.P. PVM is the general partner of Polaris Venture Partners III, L.P.  is the general partner of Polaris Venture Partners III, L.P. and has the voting and investment power over these shares and may be deemed the indirect beneficial owner of these shares. The Reporting Persons disclaim beneficial ownership of these shares, except to the extent of their pecuniary interests therein, and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of such securities for Section 16 or any other purpose.</footnote>
    </footnotes>

    <remarks>Exhibit 24 - Power of Attorney - Polaris Venture Management Co. III, L.L.C.</remarks>

    <ownerSignature>
        <signatureName>POLARIS VENTURE MANAGEMENT CO. III, LLC, /s/ Mary Blair, Mary Blair, Attorney-in-Fact for Polaris Venture Management Co. III, L.L.C.</signatureName>
        <signatureDate>2016-09-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>POLARIS VENTURE PARTNERS ENTREPRENEURS' FUND III, L.P., BY: POLARIS VENTURE MANAGEMENT CO. III, LLC, Its General Partner, /s/ Mary Blair, Mary Blair, Attorney-in-Fact for Polaris Venture Management Co. III, L.L.C.</signatureName>
        <signatureDate>2016-09-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>POLARIS VENTURE PARTNERS FOUNDERS' FUND III, L.P., BY: POLARIS VENTURE MANAGEMENT CO. III, LLC, Its General Partner, /s/ Mary Blair, Mary Blair, Attorney-in-Fact for Polaris Venture Management Co. III, L.L.C.</signatureName>
        <signatureDate>2016-09-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>POLARIS VENTURE PARTNERS III, L.P., BY: POLARIS VENTURE MANAGEMENT CO. III, LLC, Its General Partner, /s/ Mary Blair, Mary Blair, Attorney-in-Fact for Polaris Venture Management Co. III, L.L.C.</signatureName>
        <signatureDate>2016-09-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
