Exhibit 24

                               POWER OF ATTORNEY

          The undersigned, as a Section 16 reporting person of Zscaler, Inc.
(the "Company"), hereby constitutes and appoints Remo Canessa, Robert Schlossman
and Torrie Nute, and each of them, as the undersigned's true and lawful
attorney-in-fact to:

          1.  prepare, execute in the undersigned's name and on the
              undersigned's behalf, and submit to the Securities and Exchange
              Commission (the "SEC") a Form ID, including amendments thereto,
              and any other documents necessary or appropriate to obtain EDGAR
              codes and passwords enabling the undersigned to make electronic
              filings with the SEC of reports required by Section 16(a) of the
              Securities Exchange Act of 1934 or any rule or regulation of the
              SEC;

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

          3.  do all acts necessary in order to file such forms with the SEC,
              any securities exchange or national association, the Company and
              such other person or agency as the attorneys-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 27th day of February, 2018.


                                        Signature: /s/ Nehal Raj
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                                        Print Name: Nehal Raj
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