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

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2011-01-03</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000818813</issuerCik>
        <issuerName>Bitstream Inc.</issuerName>
        <issuerTradingSymbol>BITS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001510222</rptOwnerCik>
            <rptOwnerName>NEW VERNON PARTNERS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>799 CENTRAL AVENUE, SUITE 350</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HIGHLAND PARK</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60035</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Member of 10% Owner Group</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock, $0.01 par value per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1135462</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>see footnote</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">By New Vernon Aegir Master Fund Ltd.</footnote>
    </footnotes>

    <remarks>On January 3, 2011, NV North American Opportunity Fund contributed all of its assets to New Vernon Aegir Master Fund Ltd. (&quot;Master Fund&quot;) in exchange for all of the equity of Master Fund.  As a result, Master Fund became the direct beneficial owner of the shares of Common Stock subject to this filing.  New Vernon Partners LLC is the investment manager of Master Fund and New Vernon Investment Management LLC is the investment advisor of Master Fund.  By virtue of its relationship with Master Fund, New Vernon Partners LLC may be deemed to indirectly beneficially own certain shares of Common Stock subject to this filing.  All of the shares reported on this Form 3 have been previously reported as beneficially owned on Forms 3 and 4 filed by NV North American Opportunity Fund, New Vernon Investment Management LLC and Trent Stedman and are contemporaneously being reported on a Form 3 being filed by Master Fund.  New Vernon Partners LLC disclaims beneficial ownership of all shares reported on this Form 3, except to the extent of any pecuniary interest therein.</remarks>

    <ownerSignature>
        <signatureName>/s/ New Vernon Partners LLC, by Trent Stedman, Authorized Signatory</signatureName>
        <signatureDate>2011-01-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
