FOR IMMEDIATE RELEASE:

Resonate and Viasec Partner to Provide Highly Available and Secure E-Mail

Boston, Massachusetts (January 17, 2001) — Today, Resonate (NASDAQ: RSNT), the leading provider of Internet Services Management (iSM) solutions and Viasec Inc., the leading provider of software for securing e-mail communications over the Internet, announced a partnership to deliver a highly secure and scalable messaging solution. The initiative combines powerful encryption and digital certificate capabilities present in Viasec's Consus™ Secure E-mail Gateway, with proven, sophisticated traffic management and service level control software in Resonate Central Dispatch™ to reinforce and extend the scalability and fault tolerance of the Viasec solution. Resonate Central Dispatch is a key component of the Resonate iSM platform, the first and only complete solution that integrates system, application and traffic management technology to intelligently monitor and take policy-based, real-time corrective action across all aspects of the infrastructure.

Viasec Consus™ and Resonate Central Dispatch are leading solutions for a wide variety of industries including application service providers (ASPs), financial services, government, healthcare, insurance, legal, manufacturing and supply chain. Viasec Consus is the Secure E-Mail Gateway that protects and secures E-mail sent outside of the local network via the Internet. Resonate Central Dispatch provides consistent, reliable availability and performance by enabling multiple IP-based servers clustered on a LAN to act as a single, scalable and easily managed system. Through software agents resident on every server, Resonate Central Dispatch monitors a system's health and availability, then directs user requests to the server best able to maximize service levels.

By integrating these leading products, customers can deploy a platform that provides a trusted mechanism for securing and managing the electronic credentials and digital signatures of business partners while providing service level control, to ensure that e-mail traffic flows at an even pace between servers. On the Internet, the security of knowing you can send confidential information during peak hours without mail back-ups or server overloads is crucial to creating secure and reliable communications.

"This partnership extends the scalability of our Consus™ e-mail privacy solution and delivers new benefits to our customers, " said Art Quirk, Sr. Vice President, Marketing and Sales at Viasec. He added, "As we penetrate new markets, Resonate's distributed software technology will help us deliver the highest levels of availability and ensure efficient distribution of our customer's growing volumes of e-mail traffic."

"The availability and security of an e-business' E-mail system is mission-critical to success, " said Karen Styres, Vice President of Marketing at Resonate. "Resonate's partnership with Viasec brings two leading solutions together to provide instant assurance of a bullet-proof E-mail system."

About Resonate
Founded in 1995, Resonate is the leading provider of application performance management solutions for business-critical application environments. Hundreds of customers worldwide including AT&T, AIG, Bank of America, Charles Schwab, Chase Manhattan Corporation, Citibank, DoubleClick, Eastman Chemical, E*TRADE, FedEx, France Telecom, Nippon Steel and UBS PaineWebber among others, rely on Resonate solutions. Resonate has strategic partnerships with industry leaders including BEA Systems, IBM, and Sun Microsystems.

Resonate is headquartered in Sunnyvale, California.

For more information on Resonate, visit http://www.resonate.com.

About Resonate Central Dispatch™
Resonate Central Dispatch, key to Resonate's iSM platform, is a LAN-based traffic management solution to ensure optimal user satisfaction. It provides consistent, reliable service levels by enabling multiple IP-based servers clustered on a LAN to act as a single, easily managed system. Through software agents on every server, it monitors the system's health and availability and then directs requests to the server best able to maximize service levels. With its agents leveraging the processing power of distributed servers, Central Dispatch provides a solution that scales linearly, yet requires no feature trade-offs to accomplish maximum performance.

About Viasec
Founded in 1998, Viasec is a leading manufacturer of Internet security solutions. With North American headquarters in Boston, MA, and European headquarters in Donegal, Ireland, Viasec specializes in e-mail privacy management solutions.

About Consus™
Consus™ is a server-based E-mail privacy application that protects E-mail and attachments from spying and tampering over the Internet. Consus™ features standards-based (S/MIME) interoperability, international strength encryption (DES and triple DES), and patented technology that includes a built-in certificate authority. Since no desktop installs or user training are required, rapid deployment, compliance, and centralized policy enforcement are now achievable.

For a complete guide to Viasec's products and services visit http://www.viasec.com. CONTACT: John Bys, Viasec Inc., Tel: 617.248.0322, e-mail: jbys@viasec.com.

Resonate is a registered trademark, the Resonate logo, Resonate Central Dispatch and Keeping E-Business Open for Business are trademarks of Resonate, Inc. All other trademarks are property of their respective owners.

This news release contains forward-looking statements that are made under the safe harbor provisions of the federal securities laws. The forward-looking statements relating to Resonate's plans to offer combined solutions with Viasec are projections and are subject to the following risks and uncertainties: Enterprises looking to manage their IP-based infrastructures may not use Resonate's iSM solution, new technology addressing the needs of such enterprises may be developed by Resonate's competitors or other third parties, and failure of enterprises to adopt Resonate's iSM solution could have a material adverse effect on Resonate's financial results. Investors are also encouraged to read the "Risk Factors" section of Resonate's prospectus of Form 424(b), and Resonate's Quarterly Report on Form 10-Q for the quarter ended September 30, 2000, which are on file with the Securities and Exchange Commission. Readers are cautioned not to place undue reliance on these forward-looking statements, which reflect management's analysis only as of the date hereof. Resonate undertakes no obligation to publicly update or revise these forward-looking statements.