Zendesk to Report Third Quarter 2014 Financial Results on October 30, 2014

October 13, 2014

SAN FRANCISCO, CA —October 13, 2014— Zendesk, Inc. (NYSE: ZEN) today announced that it will release financial results for the third fiscal quarter ended September 30, 2014, following the close of the U.S. markets on Thursday, October 30, 2014.

Zendesk will host a conference call to discuss financial results at 2:00 p.m. Pacific Time, 5:00 p.m. Eastern Time, on Thursday, October 30, 2014. A live webcast of the conference call will be available at https://investor.zendesk.com. The conference call can also be accessed by dialing 877-201-0168, or +1 647-788-4901 (outside the U.S. and Canada). The conference ID is 19618194. A replay of the call via webcast will be available at https://investor.zendesk.com or by dialing 855-859-2056 or +1 404-537-3406 (outside the U.S. and Canada) and entering passcode 19618194. The dial-in replay will be available until the end of day November 1, 2014. The webcast replay will be available for 12 months.

About Zendesk

Zendesk provides a customer service platform designed to bring organizations and their customers closer together. With more than 45,000 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.