SBTI Selects Siebel CRM OnDemand Over Salesforce.com; Premier Six Sigma Consulting Services Firm Chooses Hosted CRM Technology Leader to Improve Sales and Marketing Processes

Business Wire, May 24, 2005

SAN MATEO, Calif. -- Siebel Systems, Inc. (Nasdaq:SEBL), the leading provider of customer-facing solutions, today announced that SBTI, a premier consulting services firm, chose Siebel CRM OnDemand over Salesforce.com for its hosted solution. Siebel CRM OnDemand allowed SBTI to improve and centralize communication with its customers and improve overall management and tracking of marketing program ROI.

SBTI delivers Performance Excellence, Six Sigma, Lean Enterprise and Business Process Improvement. As one of the original three Six Sigma deployment firms, SBTI provides the core competencies, knowledge transfer, and solutions needed to transform today's businesses in an ever-changing, competitive global market.

"Our business had grown to a point where we really needed to centralize and better manage our communications with customers. From the initial contact to closed customer, we wanted to identify the referral or program source and communicate more effectively," said Tobin Behling, Marketing Manager, SBTI, Inc. "Siebel CRM OnDemand provides us with the real-time analytics, customized reporting, and campaign management we need to help transform our customers' business."

In addition to quick deployment, limited up front investment, reliability and imminent scalability, SBTI went with Siebel CRM OnDemand because they believed that Siebel was the best long term partner. Siebel's Outlook Email Integration and robust marketing analytics will enable SBTI to measure the ROI of its marketing programs and improve lead conversion and close rates.

About Siebel CRM OnDemand

Siebel CRM OnDemand is a hosted CRM offering delivered over the Web and accessible from an Internet browser at a fixed price per user per month. Customers can deploy Siebel CRM OnDemand quickly, easily, and affordably without any up-front IT investments. Hosted by IBM, Siebel CRM OnDemand delivers complete sales, marketing, and service functionality; built-in customer analytics; virtual call center technology; embedded best practices; and world-class hosting services and support. Siebel CRM OnDemand is now available for purchase. For more information, visit www.crmondemand.com.

About Siebel Systems

Siebel Systems is the world's leading provider of customer-facing solutions that deliver demonstrable business results and long-term competitive advantage. Siebel's multichannel offerings allow organizations to intelligently manage and coordinate all customer interactions across the Web, contact center, field sales/service force, branch/retail network, and indirect and partner distribution channels. Siebel solutions draw upon the company's best-in-class capabilities in customer relationship management (CRM), business intelligence, and customer data integration and can be deployed as licensed software or as a hosted service. Siebel solutions are tailored to the unique needs of 23 industries and incorporate industry-specific business processes, best practices, and business insight. They are the product of more than $2 billion in R&D investments and reflect over 11 years of experience with more than 4,000 organizations. Together with its extensive global network of alliance partners, Siebel provides the people, process, and technology expertise critical in driving business value from the deployment of customer-facing solutions. Over 3 million users worldwide in organizations of all sizes depend on Siebel solutions to deliver dramatic improvements in how they identify, acquire, retain, and serve customers. For more information, visit 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.

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