POWER OF ATTORNEY

         The  undersigned,  as a Section 16 reporting  person of Apptio,  Inc.
(the  "Company"),  hereby  constitutes and appoints John Morrow, Todd Smith,
Frederick Williams and Jered Fahey as the undersigned's true and lawful
attorneys-in-fact, to:

         1.   Prepare, execute in the undersigned's name and on the
              undersigned's behalf, and submit to the Securities and Exchange
              Commission (the "SEC") a Form ID, including amendments thereto,
              and any other documents necessary or appropriate to obtain EDGAR
              codes and passwords enabling the undersigned to make electronic
              filings with the SEC of reports required by Section 16(a) of the
              Securities Exchange Act of 1934 or any rule or regulation of the
              SEC;

         2.   Complete and execute Forms 3, 4 and 5 and other forms and all
              amendments thereto as such attorneys-in-fact shall in their
              discretion determine to be required or advisable pursuant to
              Section 16 of the Securities Exchange Act of 1934 (as amended)
              and the rules and regulations promulgated thereunder, or any
              successor laws and regulations, as a consequence of the
              undersigned's ownership, acquisition or disposition of securities
              of the Company;

         3.   Complete and execute Forms 144 and other forms and all amendments
              thereto as such attorneys-in-fact shall in their discretion
              determine to be required or advisable pursuant to Rule 144 of the
              Securities Act of 1933 (as amended), and the rules and
              regulations promulgated thereunder, or any successor laws and
              regulations, as a consequence of the undersigned's disposition of
              securities of the Company; and

         4.   Do all acts necessary in order to file any such Forms 3, 4, 5, or
              144 with the SEC, any securities exchange or national
              association, the Company and such other person or agency as the
              attorneys-in-fact shall deem appropriate.

         The undersigned hereby ratifies and confirms all that said
attorneys-in-fact and agent shall do or cause to be done by virtue hereof. The
undersigned acknowledges that the foregoing attorneys-in-fact, in serving in
such capacity at the request of the undersigned, are not assuming, nor is the
Company assuming, any of the undersigned's responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934 (as amended).

         This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, 5 and 144 with respect to
the undersigned's holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing delivered
to the Company and the foregoing attorneys-in-fact.

         IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this September 13, 2016.

                               Signature:   /s/ Lawrence Blasko
                                            ---------------------------------
                                            Name: Lawrence Blasko
                                            Title: Chief Revenue Officer