POWER OF ATTORNEY

        Know all by these presents, that the undersigned hereby authorizes Julia
Hartz, Randy Befumo of Eventbrite, Inc., a Delaware corporation (the "Company"),
and An-Yen Hu of Goodwin Procter LLP, to execute for and on behalf of the
undersigned, in the undersigned's capacity as a director and/or officer of the
Company, Forms 3, 4 and 5, and any amendments thereto, and cause such form(s) to
be filed with the United States Securities and Exchange Commission pursuant to
Section 16(a) of the Securities Act of 1934, relating to the undersigned's
beneficial ownership of securities in the Company. The undersigned hereby grants
to 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
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 attorney-in-fact, in serving in such capacity at the request of the
undersigned, is 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
earliest of: (1) 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; (2) this Power of Attorney is revoked by the undersigned
in a signed writing delivered to the foregoing attorney-in-fact; or (3) as to a
specific attorney-in-fact, the employment of such attorney-in-fact with the
Company is terminated.

     IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 22 day of August, 2018.

                                        /s/ Samantha Harnett
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                                        Samantha Harnett