Virtual Events Leader Announces CFO Appointment

Seasoned Tech Finance Executive Joins ON24 Senior Management Team

SAN FRANCISCO, CA – June 9, 2010 – ON24, Inc., the global leader in webcasting and virtual event solutions, announced today the appointment of Drew Hamer as chief financial officer. Hamer is a seasoned finance executive with over 17 years of financial leadership experience at public and pre-public software and Internet high-tech companies. Most recently, he served as CFO at Keynote Systems in San Mateo, Calif. Prior to that, Hamer held CFO and other senior financial management positions at KnowNow, IQ Labs, Intraspect Software, Excite@Home and Sybase. A CPA, Hamer holds B.S. and M.S. degrees in accounting. “ON24 is pleased to have on its senior management team an experienced executive like Drew Hamer, and I know that his expertise will be invaluable as we embark on our next phase of growth,” said ON24 CEO Sharat Sharan.

About ON24, Inc.

The recognized global virtual events market share leader, ON24 provides webcasting and virtual environments for corporate communications and demand generation. The ON24 platform is a complete Software-as-a-Service (SaaS) cloud offering; no deployment resources are required. ON24 offers fully integrated, enterprise-wide solutions for applications ranging from training, user conferences and company meetings to partner expos and trade shows. More than 750 organizations, including IBM, Cisco, CA, Merck, AstraZeneca, Fiserv, Credit Suisse, GE and Oracle, rely on ON24. The company is headquartered in San Francisco, with offices throughout the world. For more information, visit www.ON24.com.