Press Release

ON24 Achieves Milestone - Delivering More Than 100,000 Webcast/Streaming Events

Company Announces Special Pricing for Yahoo! Broadcast Webcast Studio Professional Customers

San Francisco, CA – November 19, 2003 – ON24, Inc., the leading provider of multimedia and webcast communication solutions for the enterprise, today announced that it has delivered more than 100,000 webcast/streaming events in the last four years, a significant milestone in the company's history. This milestone demonstrates ON24's presence as the industry leader in delivering streaming and webcasting communication solutions to the corporate, financial services, government and healthcare markets

Also in the month of November, ON24 developed a program with special pricing to allow companies to simply, and cost-effectively migrate from Yahoo! Broadcast's Webcast Studio Professional to ON24 Webcast Center. To learn more, visit http://www.on24.com/.

"ON24 continues to set itself apart from the competition," said Sharat Sharan, President and CEO of ON24, Inc. "Reaching this milestone of more than 100,000 webcast/streaming events further establishes ON24's position as the leader in delivering webcast/streaming communication solutions. Our ongoing commitment to customer satisfaction and growth has been key to this success."

This milestone follows another strong quarter for ON24. In Q3, the company achieved its 11th consecutive quarter of revenue growth in its core business with customer retention rate remaining at 98% - one of the highest in the industry. ON24 also launched two key products in Q3 2003: Webcast Center Pro and Webcast Center CE. These enhanced versions of the ON24 Webcast Center give corporations greater producer features and options for delivering live and on-demand webcasts.