SAN FRANCISCO, and SAN MATEO, CA., April 3, 2000 - Siebel Systems, Inc. (Nasdaq: SEBL), the world's leading supplier of eBusiness applications software, and SPL WorldGroup, Inc. (SPL), a leading international provider of best-of-breed Customer Information and Billing Systems for the Energy and Utilities industry, today announced an alliance to Deliver an integrated enterprise-wide solution that meets the needs of large energy distribution companies, and retail energy services companies seeking to implement a Customer Information System (CIS) and ready their call centers for deregulated markets.

Under the alliance, SPL's CIS PLUS® software will be integrated with Siebel eEnergy to allow utilities to more effectively manage all customer lifecycle processes -- from customer acquisition and service initiation to meter management to credit and collections -- leading to more effective operations and improved overall customer satisfaction. By leveraging Siebel eEnergy's new Adaptive Integration module with rapid XML-based integration capabilities, Siebel Systems and SPL ensure customers speed of implementation, ease of integration and faster time-to-market. Through real-time synchronous or asynchronous two-way integration with CIS, pricing, scheduling, and back-office financial and provisioning systems, the Adaptive Integration functionality provides sales, marketing and customer service professionals with instant access to critical corporate and customer data.

Joint Customers Share Information Across All Channels Siebel Systems' multi-channel suite of eBusiness applications captures customer data and delivers a consistent customer experience across all communication channels, including Web, e-mail, direct, telephone or fax.

"Forward thinking energy companies will use Siebel eEnergy and SPL's CIS PLUS to rapidly implement bundled energy and services quoting, pricing, and contract management capabilities, seamlessly integrated with customer billing functions," said Jim McCray, Director of Product Marketing for Siebel eEnergy. "Utilities can immediately deploy a multi-channel strategy for customer acquisition and churn management, allowing them to build customer loyalty and satisfaction using the web, the call center, field sales, and service, on a local, regional, national, or global basis."

"Siebel Systems' leading eBusiness solution is the perfect complement to SPL's well-established CIS solution for Utilities," stated Moshe Mor, president and CEO, SPL WorldGroup "Siebel Systems and SPL both have reputations for quality technology and products, reliability and customer satisfaction. We are very pleased to announce such an important alliance. Utility customers will be better prepared to competitively market their services by utilizing this seamless platform to Support all of their marketing, sales, customer service and billing operations in a deregulated market."

About Siebel eEnergy
Siebel eEnergy is an out-of-the-box industry-specific solution for field sales, marketing, and call centers. With Siebel eEnergy, companies can coordinate, manage and synchronize customer relationships across all communications channels, ensuring higher customer satisfaction, increased competitiveness and improved profitability. A complete opportunity, account, and activity management solution, Siebel eEnergy enables companies to create multilevel account hierarchies based on customer site relationships with views intosite-specific usage, bill and services detail, equipment and infrastructure information, and customer summary details. Energy companies can also profile their customers and develop targeted marketing campaigns offering tailored service bundles to address customers' unique requirements. Siebel eEnergy also delivers a pre-configured energy website designed for energy sales, customer self-service, and channel partner management.

About SPL's CIS PLUS
SPL's CIS PLUS is a customer information system designed to automate and support all aspects of customer service and management in a utility market that is both regulated and deregulated. It integrates customer information such as billing, contact management, marketing, outage management and service data in an easy-to-use, real-time system that enables utilities to create and build customer satisfaction. It is currently installed at 16 of the most progressive utilities in the world. The product is designed to accommodate both utility (electric, gas, water) and non-utility services (loans, merchandise sales leases) within a single or multi-company environment.

About Siebel Systems
Siebel Systems, Inc. is the world's leading provider of eBusiness applications software. Siebel Systems provides an integrated family of eBusiness application software enabling multi-channel sales, marketing and customer service systems to be deployed over the Web, call centers, field, reseller channels, retail and dealer networks. Siebel Systems' sales and service facilities are deployed locally in more than 28 countries. For more information, please visit our web site at www.Siebel.com.

About SPL WorldGroup
SPL WorldGroup, established in 1994, is a leading international provider of best-of-breed Customer Information and Billing Systems for Energy Companies and Utilities worldwide. With over 800 professionals in 10 countries, SPL's customers include some of the largest and most progressive utilities in the world. For more information, please visit our web site at www.splwg.com.

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