Five9 to Report Second Quarter 2017 Financial Results on August 3, 2017

Five9, Inc. (Nasdaq:FIVN), a leading provider of cloud software for the enterprise contact center market, today announced that it will release financial results for the second quarter 2017 ended June 30, 2017 following the close of market on Thursday, August 3, 2017. The Company will host a corresponding conference call and webcast at 4:30 p.m. Eastern Time on that day.

Investors may listen to the conference call (ID 1761613) by dialing 877-723-9523 or 719-325-4776 at 4:30 p.m. Eastern Time on August 3, 2017. An audio replay of the call will be available through August 17, 2017 by dialing 888-203-1112 or 719-457-0820 and entering access code 1761613.

A webcast of the call will be available on the Investor Relations section of the Company’s website at http://investors.five9.com/.

About Five9

Five9 is a leading provider of cloud software for the enterprise contact center market, bringing the power of the cloud to thousands of customers and facilitating more than three billion customer interactions annually. Since 2001, Five9 has led the cloud revolution in contact centers, helping organizations transition from legacy premise-based solutions to the cloud. Five9 provides businesses with reliable, secure, compliant, and scalable cloud contact center software designed to create exceptional customer experiences, increase agent productivity, and deliver tangible business results. For more information, visit www.five9.com.

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Investor Relations:Five9, Inc.Barry Zwarenstein, 925-201-2000 ext. 5959Chief Financial [e-mail] Blueshirt Group for Five9, Inc.Lisa Laukkanen, [e-mail]