POWER OF ATTORNEY

The undersigned, as a Section 16 reporting person of RingCentral, Inc.
(the "Company"), hereby constitutes and appoints John Marlow, Paul Porter,
and Jessica Van Patten, and each of them, the undersigned's true and
lawful attorney-in-fact, to:

      1. complete and execute Forms 3, 4 and 5 and other forms and all
amendments thereto as such attorney-in-fact shall in his or her 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; and

      2. do all acts necessary in order to file such forms with the U.S.
Securities and Exchange Commission, any securities exchange or national
association, the Company and such other person or agency as the attorney-
in-fact shall deem appropriate.

      The undersigned hereby ratifies and confirms all that said attorneys-
in-fact and agents 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 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 Company and the foregoing attorneys-in-fact.

      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 25 day of April, 2022.

      					Signature: /s/ Robert I. Theis
      					Print Name: Robert I. Theis