Five9 to Present at the Barclays Global Technology, Media and Telecommunications Conference on December 6, 2017

Five9, Inc. (NASDAQ:FIVN), a leading provider of cloud software for the enterprise contact center market, announced today that members of its management team will present at the Barclays Global Technology, Media and Telecommunications Conference at the Palace Hotel in San Francisco on Wednesday, December 6th, 2017. The presentation will begin at 1:30 PM Pacific Time.

Presentation materials and the webcasts of these events 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 cloud contact center software that is reliable, secure, compliant and scalable, which is 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 Contact:Five9, Inc.Barry Zwarenstein, 925-201-2000 ext. 5959Chief Financial [e-mail] Blueshirt Group for Five9, Inc.Lisa Laukkanen, [e-mail]