Tumbleweed to Present at Upcoming Investor Conferences

Tumbleweed® Communications Corp. (NASDAQ:TMWD), an industry leader in managed file transfer and email security, today announced that its executives will be speaking at the following upcoming investor conferences: The B. Riley & Co. 9th Annual Las Vegas Investor Conference at the Palms Casino Resort on Thursday, April 3, 2008 at 7:00 p.m. EDT. America’s Growth Capital 4th Annual Information Security Conference at the Hilton San Francisco on Monday, April 7, 2008 at 5:00 p.m. EDT. Live webcasts of the presentations can be accessed by visiting the Investor Relations section of Tumbleweed’s website at http://www.tumbleweed.com. The links will also access replays of the webcasts approximately two hours after the presentations end and will be available for the following 90 days. Safe Harbor Statement Tumbleweed cautions that forward-looking statements contained in this press release are based on current plans and expectations as of the date of this press release, and that a number of factors could cause the actual results to differ materially from the guidance given at this time. These factors are described in the Safe Harbor statement below. 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 participation in the B. Riley & Co. 9th Annual Las Vegas Investor Conference and America’s Growth Capital’s 4th Annual Information Security Conference as well as the subject matter of Tumbleweed's presentations at these conferences. 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 17, 2008. Tumbleweed assumes no obligation to update information contained in this press release. Although this release may remain available on Tumbleweed's website or elsewhere, its continued availability does not indicate that Tumbleweed is reaffirming or confirming any of the information contained herein. About Tumbleweed Tumbleweed Communications Corp. (NASDAQ:TMWD), an industry leader in managed file transfer and email security, provides enterprise-class solutions to organizations of all sizes. Tumbleweed's innovative products enable organizations to effectively manage and protect business-critical Internet communications, with capabilities that span secure file transfer, encryption, data loss prevention, and email security. Tumbleweed has more than 3,200 customers worldwide, including blue-chip companies across an array of industries such as Technology, Retail, Finance, Healthcare, Manufacturing, Consumer Packaged Goods, Telecom, Energy, and the U.S. Government. The world's most security conscious organizations rely upon Tumbleweed technology including Bank of America Securities, JP Morgan Chase & Co., the U.S. Food and Drug Administration, and the U.S. Department of Defense. Our award-winning products build on 15 years of R&D and 27 security patents in the U.S. alone -- many of which are licensed by other security vendors. More information can be found at www.tumbleweed.com. Tumbleweed is a registered trademark of Tumbleweed Communications Corp. in the United States and/or other countries. All other trademarks are the property of their respective owners.