WorkForce Software Cleans Up Its Act and Selects Siebel CRM OnDemand Over Salesforce.com; Leading Web-based Employee Time and Attendance Software Vendor Focuses on Marketing ROI by Leveraging Leading Hosted CRM Technology

Business Wire, June 27, 2005

SAN MATEO, Calif. -- Siebel Systems, Inc. (Nasdaq:SEBL), the leading provider of customer-facing solutions, today announced that WorkForce Software, Inc., a leader in Web-based employee time and attendance software, chose Siebel CRM OnDemand over salesforce.com for its hosted CRM solution. Siebel CRM OnDemand allows WorkForce Software to centralize data across the company, better track and analyze leads and concentrate its marketing efforts in the right markets and industries.

With its primary focus on time and attendance for large organizations, WorkForce Software has delivered four consecutive years of profitable operations and more than 100 percent growth in revenue, profits, customers and staff size. The WorkForce Software suite interfaces with leading payroll, human resources and ERP systems to help customers automate timekeeping processes and handle labor law compliance for federal and state regulations.

"We were using ACT, which meant each sales person was using a different database. We needed to gain a company-wide perspective and a better view into our lead quality," said Stan Starkey, Vice President of Sales for WorkForce Software. "Our initial evaluation was comprehensive, but in the end it came down to Siebel and salesforce.com. Siebel offered the better overall value for WorkForce Software with its CRM expertise and continuous schedule for adding product functionality. We also liked the option to move to an on-premise version in the future, should our requirements dictate it."

Features such as opportunity management, Sales Process Coach, lead routing and assignment, and ease of customization have led to a rapid ROI for WorkForce Software. The company can now track leads as they progress through the opportunity process, identify which leads are not progressing and understand why, and better collaborate on account and contact management activities. Moving forward, WorkForce Software will focus on gaining a deeper understanding of its campaign management and taking full advantage of analytics.

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.