POWER OF ATTORNEY

        The undersigned hereby constitutes and appoints each of Craig Gatarz,
Michael Tran, and Michael Hedge signing singly, as the undersigned's true and
lawful attorney-in-fact to:

        (1)    execute for and on behalf of the undersigned, in the
               undersigned's capacity as an officer and/or director of
               Veritone, Inc. (the "Company"), a Form ID and Forms 3, 4 and 5
               in accordance with Section 16(a) of the Securities Exchange Act
               of 1934, as amended, and the rules thereunder;

        (2)    do and perform any and all acts for and on behalf of the
               undersigned which may be necessary or desirable to complete and
               execute any such Form ID, 3, 4 or 5 and file such form with the
               United States Securities and Exchange Commission and any stock
               exchange or similar authority or organization; and

        (3)    take any other action of any type whatsoever in connection with
               the foregoing which, in the opinion of such attorney-in-fact,
               may be of benefit to, in the best interest of, or legally
               required by, the undersigned, it being understood that the
               documents executed by such attorney-in-fact on behalf of the
               undersigned pursuant to this Power of Attorney shall be in such
               form and shall contain such terms and conditions as such
               attorney-in-fact may approve in such attorney-in-fact's
               discretion.

        The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this power of attorney and the
rights and powers herein granted. 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 and 5 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
foregoing attorneys-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of May 5, 2022.

                                   /s/ Michael Zemetra
                                   -------------------------------
                                   Michael Zemetra