Tumbleweed Customers Report Excellent Performance and Scaleability of Secure Guardian 5.0

Independent customer satisfaction survey validates that Tumbleweed Secure Guardian solutions are uniquely scalable, manageable and available

REDWOOD CITY, CA - May 30, 2002 - (BUSINESS WIRE) - Tumbleweed® Communications Corp. (Nasdaq:TMWD), a leading provider of secure content management solutions for enabling the business Internet, released the results today of its 2001 customer satisfaction survey. The survey was independently managed by a third-party market research firm to insure objective findings. More than 2,000 people were invited to participate in the survey, and more than 400 took part. The results clearly indicate that the distributed architecture, centralized administration, high availability and performance of Tumbleweed Secure Guardian 5.0 are highly valued product features.

"This survey is an important component of our customer-centric focus as a company," said Jeff Smith, Chairman and CEO of Tumbleweed Communications Corp. "The results validate our research and development efforts and product planning decisions, and confirm that the 5.0 versions of our products are meeting the business needs of our customers. Additionally, the survey has already helped us enhance the services we provide our customers who have mission-critical applications based on the Secure Guardian platform."

Other areas of high satisfaction cited by customers included ease of use and deployment, and the ability of Tumbleweed software to meet business needs, which combined with the unparalleled performance and robust feature set, confirms our strategy of driving adoption by our installed base of the full suite of products that make up Tumbleweed Secure Guardian.

Tumbleweed now counts more than 1,000 enterprise customers -- including 100 of the Fortune 500 and 7 of the top 20 banks in the United States. Of the respondents to the survey, more than 30% fall into the financial services or insurance industries. Other industries represented include healthcare, technology, manufacturing, legal as well as government agencies.

Pricing and Availability of Tumbleweed Secure Guardian 5.0
Tumbleweed Secure Guardian 5.0 is available today. Prices range from $10,000 to $60,000 per CPU depending upon the solution deployed. For more information, please contact your Tumbleweed business development representative or channel alliance partner.

About Tumbleweed
Tumbleweed is a leading provider of solutions for managing secure communication and collaboration to enable the business Internet. Tumbleweed's robust policy-based framework empowers organizations to safely share and protect critical information, increase customer loyalty and privacy and dramatically reduce costs. Tumbleweed is trusted by 1,000 blue-chip customers including American Express, Chevron, Datek Online, the European Union's Joint Research Council, First Union Wachovia, John Deere, Merrill Lynch, Nike, Northern Trust, NTT, Salomon Smith Barney, Travelers and US Food and Drug Administration. One hundred of the Fortune 500 are Tumbleweed customers. Tumbleweed Communications was founded in 1993 and is headquartered in Redwood City, Calif., with offices around the world.

Except for the historical information contained herein, the matters discussed in this press release may constitute forward-looking statements that involve risks and uncertainties that could cause actual results to differ materially from those projected, particularly with respect to Tumbleweed's customers, products, and future offerings. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "should," "potential," "continue," "expects," "anticipates," "intends," "plans," "believes," "estimates," and similar expressions. For further cautions about the risks of investing in Tumbleweed, we refer you to the documents Tumbleweed files from time to time with the Securities and Exchange Commission, particularly Tumbleweed's Form 10-K filed March 30, 2002 and Form 10-Q filed May 14, 2002. Tumbleweed assumes no obligation to update information contained in this press release.