Zendesk, Inc. Announces Pricing of Initial Public Offering

May 14, 2014

SAN FRANCISCO, CA – May 14, 2014 – Zendesk, Inc. today announced the pricing of its initial public offering of 11,111,111 shares of its common stock at a price of $9.00 per share. The shares are expected to begin trading on the New York Stock Exchange on May 15, 2014 under the ticker “ZEN.” All of the common stock is being offered by Zendesk, Inc. In addition, Zendesk, Inc. has granted the underwriters a 30-day option to purchase up to 1,666,666 additional shares of common stock from Zendesk, Inc. at the initial public offering price.

Goldman, Sachs & Co., Morgan Stanley & Co. LLC, and Credit Suisse Securities (USA) LLC are acting as joint book-running managers for the offering. Pacific Crest Securities LLC and Canaccord Genuity Inc. are acting as co-managers.

The offering will be made only by means of a prospectus. Copies of the prospectus related to the offering may be obtained, when available, from Goldman, Sachs & Co., Attention: Prospectus Department, 200 West Street, New York, NY 10282, by telephone at (866) 471-2526, or by email at prospectus-ny@ny.email.gs.com; from Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180 Varick Street, 2nd Floor, New York, NY 10014; or from Credit Suisse Securities (USA) LLC, Attention: Prospectus Department, One Madison Avenue, New York, NY 10010, by telephone at (800) 221-1037, or by email at newyork.prospectus@credit-suisse.com.

A registration statement relating to these securities has been filed with, and declared effective by, the Securities and Exchange Commission. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About Zendesk

Zendesk provides a customer service platform designed to bring organizations and their customers closer together. With more than 40,000 customer accounts, Zendesk is used by organizations in 140 countries to provide support in more than 40 languages. Founded in 2007 and headquartered in San Francisco, Zendesk has operations in the United States, Europe, Asia, Australia and South America.