SANTA CLARA, Calif., June 20, 2005—Research firm Frost & Sullivan has awarded WebEx Communications (Nasdaq: WEBX) the prestigious 2005 Market Leadership Award for continued success within the web conferencing industry.

In its recently released market report, Frost & Sullivan praised WebEx for its leading market share, revenues, installed base, profitability, solution offerings, and customer mind share. According to the report, WebEx has 64.4 percent of the worldwide web conferencing services market, more than three times its nearest competitor.

“WebEx has redefined the market and pushed adoption by constantly striving for high functionality, reliability, security, and enhanced value for its offerings,” stated Roopam Jain, Frost & Sullivan industry analyst. “WebEx has expanded beyond web conferencing to offer not just a technology solution, but also a range of specialized applications that solve specific business problems and enable business processes by looking at the entire workflow of applications.”

The Frost & Sullivan Market Leadership Award is given each year to the company that has exhibited market leadership through successful implementation of a defined and focused business strategy. To choose the recipient of this award, Frost & Sullinvan analysts track revenues and market shares, hold interviews with all market participants and conduct extensive secondary research of proprietary data sources. The Market Leaderhip Award is then given to the company that has excelled across all categories.

WebEx manages a global network over which it delivers a suite of real-time collaboration applications including services for web conferencing, web-based support, remote training and online events. These applications help businesses accelerate the sales cycle, increase revenue, improve employee productivity, speed products to market, enhance customer satisfaction and decrease training and travel costs. All of WebEx’s services are built on the MediaTone™ communications platform and delivered through the WebEx MediaTone Network, the only global network specifically designed for real-time web collaboration. WebEx also provides a worldwide network of certified WebEx specialists to help companies maximize return from these applications.

About WebEx Communications
WebEx Communications, Inc. is the world's leading provider of collaborative web meeting applications and services. WebEx applications are used across the enterprise in sales, support, training, marketing, engineering and product design. WebEx delivers its suite of web meeting applications over the WebEx MediaTone Network, a global network specifically designed for secure, real-time web collaboration. WebEx Communications is based in Santa Clara, California and has regional headquarters in Europe, Asia and Australia. Please call toll free 877-509-3239 or visit www.webex.com for more information.

About Frost & Sullivan
Founded in 1961, Frost & Sullivan is recognized as a global leader in growth consulting. Frost & Sullivan Awards are presented to companies that demonstrate excellence in their industry, commending the diligence, commitment, and innovative business strategies required to advance in the global marketplace. Frost & Sullivan rigorously analyzes specific criteria to determine award recipients in a vast variety of market industries and landscapes. For further information, visit www.frost.com.

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WebEx and MediaTone are trademarks and/or registered trademarks of WebEx Communications, Inc.

The above referenced report was produced by Frost & Sullivan, an independent third party analyst that is not affiliated with WebEx Communications, Inc. The opinions, analysis, estimates or forecasts contained in the report regarding WebEx and the web conferencing industry are the opinions of the analyst alone and do not represent opinions, estimates, forecasts or predictions of WebEx Communications, Inc. or its management. WebEx Communications, Inc. does not by this press release imply its endorsement of or concurrence with such opinions, analysis, estimates or forecasts.

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements may be identified by use of the terms anticipates, believes, continue, could, estimates, expects, intends, may, plans, potential, predicts, should or will, or the negative of those terms or similar expressions. These forward-looking statements are subject to significant risks and uncertainties. Actual results may differ materially from those described in such statements as a result of these risks and uncertainties. In particular, these forward looking statements include, but are not limited to, the statement that WebEx applications help businesses accelerate the sales cycle, increase revenue, improve employee productivity, speed products to market, enhance customer satisfaction and decrease training and travel costs. Factors which could contribute to risks and uncertainties include, but are not limited to, the failure of customers to utilize WebEx applications effectively in their business or reduce their other expenses. A fuller discussion of the risks and uncertainties that could affect WebEx Communications, Inc. are more fully set forth in WebEx Communications, Inc.'s filings with the Securities and Exchange Commission, including WebEx's Form 10-Q filed with the SEC on May 10, 2005. WebEx Communications, Inc. assumes no obligation to update forward-looking information contained in this press release.