Five9 to Report Second Quarter 2018 Financial Results on August 6, 2018

Five9, Inc. (Nasdaq:FIVN), a leading provider of cloud contact center software for the digital enterprise, today announced that it will release financial results for the second quarter 2018 ended June 30, 2018 following the close of market on Monday, August 6, 2018. 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 6113370) by dialing 888-204-4368 or 323-794-2423 at 4:30 p.m. Eastern Time on August 6, 2018. An audio replay of the call will be available through August 20, 2018 by dialing 888-203-1112 or 719-457-0820 and entering access code 6113370.

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 contact center software for the digital enterprise, bringing the power of cloud innovation to customers and facilitating more than three billion customer interactions annually. Five9 provides end-to-end solutions with omnichannel routing, analytics, WFO, and AI to increase agent productivity and deliver tangible business results. The Five9 platform is reliable, secure, compliant, and scalable; designed to create exceptional personalized customer experiences. For more information visit www.five9.com.

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