Zendesk to Report Fourth Quarter and Full Fiscal Year 2015 Financial Results on February 16, 2016

January 14, 2016

SAN FRANCISCO, CA – January 14, 2016 – Zendesk, Inc. (NYSE: ZEN) today announced that it will release financial results for the fourth fiscal quarter and full fiscal year ended December 31, 2015 following the close of the U.S. markets on Tuesday, February 16, 2016.

Zendesk will host a conference call to discuss financial results at 2:00 p.m. Pacific Time, 5:00 p.m. Eastern Time, on Tuesday, February 16, 2016. 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 21383226. 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 21383226. The dial-in replay will be available until the end of day February 18, 2016. 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 64,000 paid customer accounts, Zendesk’s products are used by organizations in 150 countries and territories 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. Learn more at www.zendesk.com.