POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints
each of Mark S. Zagorski, Nicola T. Allais and Andrew E. Grimmig, and each of
them individually, 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 DoubleVerify Holdings, Inc. (the "Company"), (i)
Forms 3, 4 and 5 and any other forms required to be filed in accordance with
Section 16(a) of the Securities Exchange Act of 1934 (the "Exchange Act") and
the rules thereunder (a "Section 16 Form"), and (ii) a Form ID and any other
forms required to be filed or submitted in accordance with Regulation S-T
promulgated by the United States Securities and Exchange Commission (or any
successor provision) in order to file a Section 16 Form electronically (a "Form
ID", and, together with a Section 16 Form, the "Forms and Schedules"); (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 Forms and Schedules,
complete and execute any amendment or amendments thereto, and timely file such
Forms and Schedules with the United States Securities and Exchange Commission
and any stock exchange or similar authority; and (3) take any other action of
any type whatsoever in connection with the foregoing which, in the opinion of
each 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 each 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 he or she may approve in his or her 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 each such attorney-in-fact, or his or
her 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 each such attorney-in-fact is serving in such
capacity at the request of the undersigned, and is not assuming, nor is the
Company assuming, any of the undersigned's responsibilities to comply with
Section 16 of the Exchange Act.

The Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file any Forms and Schedules 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 each such attorney-in-fact. From and after the date hereof, any Power of
Attorney previously granted by the undersigned concerning the subject matter
hereof is hereby revoked.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 15th day of February, 2024.


By: /s/ Gary Swidler
Name: Gary Swidler