<?xml version="1.0"?>
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    <schemaVersion>X0704</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001313154</cik>
        <entityName>BlackArrow Inc</entityName>
        <issuerAddress>
            <street1>160 W. SANTA CLARA STREET</street1>
            <street2>SUITE 202</street2>
            <city>SAN JOSE</city>
            <stateOrCountry>CA</stateOrCountry>
            <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
            <zipCode>95113</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>408-642-6477</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Dean</firstName>
                <lastName>Denhart</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o BlackArrow, Inc.</street1>
                <street2>160 W. Santa Clara Street, Suite 202</street2>
                <city>San Jose</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>95113</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Nick</firstName>
                <lastName>Troiano</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o BlackArrow, Inc.</street1>
                <street2>160 W. Santa Clara Street, Suite 202</street2>
                <city>San Jose</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>95113</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Tracy</firstName>
                <lastName>Martin</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o BlackArrow, Inc.</street1>
                <street2>160 W. Santa Clara Street, Suite 202</street2>
                <city>San Jose</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>95113</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Peter</firstName>
                <lastName>Flint</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Polaris Venture Partners</street1>
                <street2>1000 Winter Street, Suite 3350</street2>
                <city>Waltham</city>
                <stateOrCountry>MA</stateOrCountry>
                <stateOrCountryDescription>MASSACHUSETTS</stateOrCountryDescription>
                <zipCode>02451</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Allen</firstName>
                <lastName>Morgan</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Mayfield Fund</street1>
                <street2>2800 Sand Hill Road, Suite 250</street2>
                <city>Menlo Park</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94025</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>David</firstName>
                <lastName>Horowitz</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Comcast Interactive Group</street1>
                <street2>1201 Market Street, Suite 1000</street2>
                <city>Wilmington</city>
                <stateOrCountry>DE</stateOrCountry>
                <stateOrCountryDescription>DELAWARE</stateOrCountryDescription>
                <zipCode>19801</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Larry</firstName>
                <lastName>Kramer</lastName>
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            <relatedPersonAddress>
                <street1>c/o Polaris Venture Partners</street1>
                <street2>1000 Winter Street, Suite 3350</street2>
                <city>Waltham</city>
                <stateOrCountry>MA</stateOrCountry>
                <stateOrCountryDescription>MASSACHUSETTS</stateOrCountryDescription>
                <zipCode>02451</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Pyrros</firstName>
                <lastName>Koussios</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o NDS Investments AB</street1>
                <street2>Carlsgatan 12 A, 211 20</street2>
                <city>Malmo</city>
                <stateOrCountry>V7</stateOrCountry>
                <stateOrCountryDescription>SWEDEN</stateOrCountryDescription>
                <zipCode>211 20</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other Technology</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2010-03-24</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>Series C Preferred Stock and the underlying Common Stock issuable upon conversion of such Preferred Stock.</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>25000000</totalOfferingAmount>
            <totalAmountSold>20013076</totalAmountSold>
            <totalRemaining>4986924</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>11</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>BlackArrow Inc</issuerName>
                <signatureName>Tracy Martin</signatureName>
                <nameOfSigner>Tracy Martin</nameOfSigner>
                <signatureTitle>Chief Financial Officer</signatureTitle>
                <signatureDate>2010-04-20</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
