Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8of Zscaler, Inc.of our report dated September 13, 2018 relating to the financial statements, which appears in Zscaler, Inc.’s Annual Report on Form 10‑K for the year ended July 31, 2018.

/s/ PricewaterhouseCoopers LLPSan Jose, CaliforniaSeptember 13, 2018