December 8, 2021

                               POWER OF ATTORNEY

                      FOR SECTION 16 REPORTING OBLIGATIONS

        KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Christina Lema, Lawrence J. Samuelson and Christina Sterling,
signing singly, the undersigned's true and lawful attorney-in-fact to: (i)
execute for and on behalf of the undersigned, in the undersigned's capacity as
an officer and/or director and/or owner of greater than 10% of the outstanding
shares of common stock of Cvent Holding Corp., a Delaware corporation (the
"Company"), Forms 3, 4 and 5 (including any amendments, supplements or exhibits
thereto) in accordance with Section 16(a) of the Securities Exchange Act of 1934
and the rules thereunder; (ii) 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 3, 4 or 5 (including any amendments, supplements or exhibits
thereto) and timely file such form with the United States Securities and
Exchange Commission (the "SEC") and any stock exchange or similar authority,
including Nasdaq, and including without limitation the filing of a Form ID or
any other documents necessary or appropriate to enable the undersigned to file
the Form 3, 4 and 5 electronically with the SEC; (iii) seek or obtain, as the
undersigned's representative and on the undersigned's behalf, information on
transactions in the Company's securities from any third party, including
brokers, employee benefit plan administrators and trustees, and the undersigned
hereby authorizes any such person to release any such information to each of the
undersigned's attorneys-in-fact appointed by this Power of Attorney and ratifies
any such release of information; and (iv) 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.

        This Power of Attorney shall remain in full force and effect until the
earlier of (i) the date on which the undersigned is no longer required to file
Forms 3, 4 or 5 with respect to the undersigned's holdings of and transactions
in securities issued by the Company; (ii) as to the appointment of each of
Lawrence J. Samuelson and Christina Sterling, upon his or her respective
resignation or termination as an employee of the Company, and as to the
appointment of Christina Lema, upon her respective resignation or termination as
an employee of Vista Equity Partners Management, LLC; and (iii) the revocation
of this Power of Attorney by the undersigned in a signed writing delivered to
each of such attorneys-in-fact.  This Power of Attorney may be filed with the
Commission as a conforming statement of the authority granted herein.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of date first written above.

                                                    Signed and acknowledged:


                                        VISTA EQUITY PARTNERS FUND VI, L.P.

                                        By: Vista Equity Partners Fund VI GP,
                                        L.P.
                                        Its: General Partner

                                        By: VEPF VI GP, Ltd.
                                        Its: General Partner

                                        By: /s/ Robert F. Smith
                                            ------------------------------------
                                        Name: Robert F. Smith
                                        Title: Director

                                        VISTA EQUITY PARTNERS FUND VI-A, L.P.

                                        By: Vista Equity Partners Fund VI GP,
                                        L.P.
                                        Its: General Partner

                                        By: VEPF VI GP, Ltd.
                                        Its: General Partner

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name:Robert F. Smith
                                        Title: Director

                                        VEPF VI FAF, L.P.

                                        By: Vista Equity Partners Fund VI GP,
                                        L.P.
                                        Its:General Partner

                                        By: VEPF VI GP, Ltd.
                                        Its:General Partner

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Director

                                        VISTA EQUITY PARTNERS FUND VI GP, L.P.

                                        By: VEPF VI GP, Ltd.
                                        Its: General Partner

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Director

                                        VEPF VI GP, LTD.

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Director

                                        VEPF MANAGEMENT, L.P.

                                        By: VEP Group, LLC
                                        Its: General Partner

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        VISTA EQUITY PARTNERS MANAGEMENT, LLC

                                        By: VEP Group, LLC
                                        Its: Managing Member

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        VEPF IV AIV VII, L.P.

                                        By: Vista Equity Partners Fund IV GP,
                                        LLC
                                        Its: General Partner

                                        By: VEP Group, LLC
                                        Its: Managing Member

                                        By: /s/ Robert F. Smith
                                            ------------------------------------
                                        Name:Robert F. Smith
                                        Title: Managing Member

                                        VEPF IV AIV VII-A, L.P.

                                        By: Vista Equity Partners Fund IV GP,
                                        LLC
                                        Its: General Partner

                                        By: VEP Group, LLC
                                        Its: Managing Member

                                        By: /s/ Robert F. Smith
                                            ------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        VISTA EQUITY PARTNERS FUND IV GP, LLC

                                        By: VEP Group, LLC
                                        Its: Managing Member

                                        By: /s/ Robert F. Smith
                                            ------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        VEPF III AIV VI, L.P.

                                        By: Vista Equity Partners Fund III GP,
                                        LLC
                                        Its: General Partner

                                        By: VEP Group, LLC
                                        Its: Managing Member

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        VEPF III AIV VI-A, L.P.

                                        By: Vista Equity Partners Fund III GP,
                                        LLC
                                        Its: General Partner

                                        By: VEP Group, LLC
                                        Its: Managing Member

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        VISTA EQUITY PARTNERS FUND III GP, LLC

                                        By: VEP Group, LLC
                                        Its: Managing Member

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        VFF I AIV IV, L.P.

                                        By: Vista Foundation Fund I GP, LLC
                                        Its: General Partner

                                        By: VEP Group, LLC
                                        Its: Managing Member

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        VFF I AIV IV-A, L.P.

                                        By: Vista Foundation Fund I GP, LLC
                                        Its:General Partner

                                        By: VEP Group, LLC
                                        Its: Managing Member

                                        By: /s/ Robert F. Smith
                                            ------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        VISTA FOUNDATION FUND I GP, LLC

                                        By: VEP Group, LLC
                                        Its: Managing Member

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        VEP GROUP, LLC

                                        By: /s/ Robert F. Smith
                                           -------------------------------------
                                        Name: Robert F. Smith
                                        Title: Managing Member

                                        /s/ Robert F. Smith
                                        ----------------------------------------
                                        Robert F. Smith