POWER OF ATTORNEY FOR
                        SECTION 16 REPORTING OBLIGATIONS

                                 March 4, 2021

        KNOW ALL BY THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Christopher H. Turner and Tara O'Neill, each signing
singly, as the undersigned's true and lawful attorneys-in-fact, with full power
and authority as hereinafter described on behalf of and in the name, place and
stead of the undersigned to:

        (i)    execute for and on behalf of the undersigned, in the
               undersigned's capacity as a director, officer or beneficial owner
               of shares of stock of Warburg Pincus Capital Corporation I-B, a
               Cayman Islands exempted company (the "Company"), any Schedule 13D
               or Schedule 13G, and any amendments, supplements or exhibits
               thereto (including any joint filing agreements) required to be
               filed by the undersigned under Section 13 of the Securities
               Exchange Act of 1934, as amended, and the rules and regulations
               promulgated thereunder (the "Exchange Act"), and any Forms 3, 4
               and 5 and any amendments, supplements or exhibits thereto
               required to be filed by the undersigned under Section 16(a) of
               the Exchange Act;

        (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 Schedule 13D, Schedule 13G, Form 3, 4 or 5 and
               timely file such forms with the United States Securities and
               Exchange Commission and any stock exchange on which the stock of
               the Company is then listed; and

        (iii)  take any other action of any type whatsoever in connection with
               the foregoing which, in the opinion of such attorneys-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 attorneys-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
               attorneys-in-fact may approve in such attorneys-in-fact's
               discretion.

        The undersigned hereby grants to such attorneys-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 attorneys-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 13 and Section 16
of the Exchange Act.

        This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file reports or schedules under Section 13
or Section 16 of the Exchange Act 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 the date first written above.

                                                  /s/ Mark Colodny
                                                  -----------------------------
                                                  Mark Colodny