<SUBMISSION>
<ACCESSION-NUMBER>0001491778-15-000090
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20150515
<FILING-DATE>20150518
<DATE-OF-FILING-DATE-CHANGE>20150518
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>Angie's List, Inc.
<CIK>0001491778
<ASSIGNED-SIC>7310
<IRS-NUMBER>272440197
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>1030 EAST WASHINGTON STREET
<STREET2>SUITE 100
<CITY>INDIANAPOLIS
<STATE>IN
<ZIP>46202
<PHONE>317-803-3973
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>1030 EAST WASHINGTON STREET
<STREET2>SUITE 100
<CITY>INDIANAPOLIS
<STATE>IN
<ZIP>46202
</MAIL-ADDRESS>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>TRI Investments, LLC
<CIK>0001533949
<STATE-OF-INCORPORATION>MA
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-35339
<FILM-NUMBER>15873250
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>TRI INVESTMENTS, LLC
<STREET2>711 BOYLSTON AVENUE
<CITY>BOSTON
<STATE>MA
<ZIP>02116
<PHONE>(617) 535-5025
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>TRI INVESTMENTS, LLC
<STREET2>711 BOYLSTON AVENUE
<CITY>BOSTON
<STATE>MA
<ZIP>02116
</MAIL-ADDRESS>
</REPORTING-OWNER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>TRI Ventures, Inc.
<CIK>0001159861
<STATE-OF-INCORPORATION>MA
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-35339
<FILM-NUMBER>15873251
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>711 BOYLSTON STREET
<CITY>BOSTON
<STATE>MA
<ZIP>02116
<PHONE>617-535-5000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>711 BOYLSTON STREET
<CITY>BOSTON
<STATE>MA
<ZIP>02116
</MAIL-ADDRESS>
<FORMER-NAME>
<FORMER-CONFORMED-NAME>AQUENT INC
<DATE-CHANGED>20010924
</FORMER-NAME>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_143197976493623.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-05-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001491778</issuerCik>
        <issuerName>Angie's List, Inc.</issuerName>
        <issuerTradingSymbol>ANGI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001159861</rptOwnerCik>
            <rptOwnerName>TRI Ventures, Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>711 BOYLSTON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001533949</rptOwnerCik>
            <rptOwnerName>TRI Investments, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>711 BOYLSTON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2015-05-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3312</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.2512</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11651102</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 28, 2014. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.205 to $6.290, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within ranges set forth in this Form 4.</footnote>
        <footnote id="F2">These shares are owned by TRI Investments, LLC, which is a subsidiary of TRI Ventures, Inc. TRI Ventures, Inc. is the indirect beneficial owner of the reported securities.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Shannon Shaw, attorney-in-fact for TRI Ventures, Inc. and TRI Investments, LLC</signatureName>
        <signatureDate>2015-05-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
