Vitria Partners with Siebel Systems to Enhance BusinessWare for Siebel Application Network Solution.

Business Editors/High-Tech Writers

SANTA CLARA, Calif.--(BUSINESS WIRE)--April 8, 2002

Customers Can Leverage Existing Investments to Deploy

Standards-Based, End-to-End Business Process Solution

Vitria (Nasdaq:VITR), the leading provider of innovative integration solutions, today announced its plans to extend Vitria BusinessWare to support Siebel Application Network. Working closely with Siebel Systems, Inc. (Nasdaq:SEBL), the world's leading provider of eBusiness applications software, Vitria will offer a robust, scalable integration server that will run standards-based business processes delivered by Siebel Application Network. The enhanced solution will allow customers to leverage their existing technology investments, extend relationships with their preferred vendors, and lower their total cost of ownership.

Siebel Application Network is a standards-based solution that cost-effectively solves the complex business process integration problem across the enterprise. Siebel Application Network consists of three major components: a comprehensive business process library, state-of-the-art business process design tool, and market-leading integration server. The business process library provides a robust set of prepackaged business processes, which are standards-based and independent of both the underlying applications and the integration server. The business process design tool provides an intuitive graphical interface for configuring and extending business processes. The integration server is the enhanced Vitria BusinessWare platform designed specifically to execute standards-based business processes. The result is a customer-centric solution that dramatically reduces the need for customization, minimizes complexity, speeds deployment, and delivers a low total cost of ownership.

Vitria is a Strategic Software Partner in the Siebel Alliance Program. The two companies have partnered to provide a unique application integration solution to joint customers. Siebel Systems will leverage its domain knowledge in business processes and enterprise applications, while Vitria will leverage its business process integration knowledge and its integration server technology. The result will be an enhanced solution that will reduce the complexity and cost of customer's application integrations.

"The combination of Vitria's integration platform and Siebel Systems' deep industry expertise will help customers simplify process integration and experience rapid return on their technology investment," said Dale Skeen, Chief Technology Officer, Vitria. "Siebel Application Network provides a unique, customer-centric approach to process integration challenges, and we are excited to partner with Siebel Systems to offer customers immediate value."

As business processes change, customers are now demanding a solution that reduces complexity and costs while increasing productivity, flexibility, and time to market. Together, Vitria and Siebel Systems offer customers a robust, scalable, reliable solution to integrate applications and business processes across their enterprises. With the joint solution, customers can quickly and easily solve integration issues with prebuilt configurable solutions, while maintaining the highest level of service to their customers.

"The value of partnering with Vitria to augment the Siebel Application Network solution will be in our shared vision of delivering applications that offer customers integrated, process-based IT solutions," said Dr. Steve Garnett, Vice President and General Manager, Alliances for Siebel Systems.

About Vitria

Vitria Technology, Inc. (Nasdaq:VITR) is the leading provider of innovative integration solutions. The company pioneered the enterprise application integration market in 1994 and the use of business process management in 1997, and is now the first integration solution provider to solve integration challenges through collaborative applications. With 35 offices around the world, Vitria's customer base includes such companies as Bell South, The Blue Cross Blue Shield Association, BP, DaimlerChrysler Bank, Dana, Generali, The Goodyear Tire & Rubber Company, PacifiCare Health Systems, Reynolds & Reynolds, Schneider Logistics, Sprint, Trane, and Trans Union, and The United States' Departments of Defense and Veteran's Affairs. For more information call 408/212-2700, email [e-mail] or visit www.vitria.com.

About Siebel Systems

Siebel Systems, Inc. is the world's leading provider of eBusiness applications software. Siebel Systems provides an integrated family of eBusiness applications software, enabling multichannel sales, marketing, and customer service systems to be deployed over the Web, in call centers, in the field, through reseller channels, and across retail and dealer networks. Siebel Systems' sales and service facilities are located in more than 32 countries. For more information, please visit Siebel Systems' Web site at www.siebel.com.

Except for the historical information contained herein, this press release contains forward-looking statements that involve risk or uncertainties. Future operating results of Siebel Systems may differ from the results discussed or forecasted in the forward-looking statements due to factors that include, but are not limited to, risks associated with customer relations, such as the availability of Siebel Systems' products and services, customer implementation of products and services, relationships with customers, third-party vendors and systems integrators, concentration of revenues in a relatively small number of customers, existence of errors or defects in products, ability to successfully manage growth, significant current and expected additional competition, and the need to continue to expand product distribution and services offerings. Further information on potential factors that could affect the financial results of Siebel Systems are included in Siebel Systems' Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, and its other filings with the Securities and Exchange Commission, which are available at www.sec.gov. Siebel Systems assumes no obligation to update the information in this press release.

Note to Editors: Siebel is a trademark of Siebel Systems, Inc. and may be registered in certain jurisdictions. All other product and company names mentioned are the property of their respective owners and are mentioned for identification purposes only.