Onyx Software Extends Support of IBM Technologies
Announces General Availability of Onyx Enterprise CRM 4.0 on IBM AIX Platform and Support for Powerful New IBM POWER4+ Midrange Server

BELLEVUE, Wash. - Onyx® Software Corp. (Nasdaq: ONXS), a worldwide leader in successful CRM, today announced its support of IBM's (NYSE: IBM ) AIX Platform and the new IBM eServer pSeries 650, which was introduced today. This increased support for IBM technology significantly expands Onyx's addressable market for CRM, bringing the power of highly scalable technology to the UNIX midrange market.

"Delivery of the IBM AIX platform is a key component of the IBM/Onyx relationship and increases Onyx's support of IBM technologies," said Eben Frankenberg, executive vice president of Onyx Software. "We pride ourselves on delivering bottom-line success to our customers, which means our offering with IBM must perform as promised. The IBM eServer p650 in combination with Onyx Enterprise CRM 4.0 software provides customers with a highly reliable, scalable e-business platform."

Greater Efficiency and Flexibility Complement Onyx Enterprise CRM Strengths
With IBM's newest, fastest 64-bit microprocessor, POWER4+, the IBM eServer p650 in combination with Onyx Enterprise CRM 4.0 software provides customers with an ideal platform on which to run the database layer of Onyx Enterprise CRM.

In addition, the p650 offers superior flexibility with dynamic partitioning, allowing for up to eight partitions and enabling consolidation of applications and servers, which can result in operational cost and performance efficiencies. The IBM eServer p650 runs the AIX(R) operating system, including the new AIX 5L(tm) version 5.2, and Linux*, or both in partitions.

Onyx Enterprise CRM integrates sales, marketing, and service operations throughout an enterprise to manage the multiple dimensions of customer and partner relationships. Onyx CRM is a single, unified application comprised of portals for tailoring functionality to different user communities, intuitive web interfaces for ease of navigation and a web-services platform for interoperability with other business systems. Companies large and small have successfully deployed Onyx CRM, efficiently scaling from 50 to more than 5,000 users in live production environments.

Support for IBM AIX Platform
As part of its support, Onyx has developed the Onyx SQL Generator. This data-driven engine intelligently translates XML into SQL code that is optimized for whatever platform the customer deploys. The vendor-specific SQL code takes advantage of the unique features of each database application, leading to superior performance.

"We are delighted to welcome Onyx as a key partner on our AIX platform. The relationship between Onyx and IBM is ultimately about delivering CRM solutions on proven technology to customers," said Per Larsen, vice president, IBM eServer pSeries. "The p650 offers extreme performance for a wide range of applications, from small- to medium-size businesses in the industrial, distribution, financial services, and other sectors. Coupled with key solutions like Onyx Enterprise CRM 4.0, the new IBM eServer p650 gives customers uncompromising flexibility, high availability and scalability."

About Onyx Software
Onyx Software Corp. (Nasdaq: ONXS), worldwide leader in delivering successful CRM, offers a fast, cost-effective, usable solution that shares critical information among employees, customers and partners through three role-specific, Web services-based portals. The Onyx approach delivers real-world success by aligning CRM technology with business objectives, strategies and processes. Companies rely on Onyx across multiple departments to create a superior customer experience and a profitable bottom line. Onyx serves customers worldwide in a variety of industries, including financial services, healthcare, high technology and the public sector. Customers include Agile Software Corp., Credit Suisse, Delta Dental Plans of California and Pennsylvania, Dreyfus Corp., Fluke Networks, Inc., Ingenix Health Intelligence, The Regence Group, The Seattle Mariners and Suncorp. More information can be found at 888-ASK-ONYX, or info@onyx.com.

About IBM eServer
For more information, visit www.ibm.com/eserver.

This press release contains forward-looking statements, including statements about the addressable CRM market for Onyx and the performance of Onyx products when used in combination with the products and services of IBM. Forward-looking statements are based on the opinions and estimates of management at the time the statements are made and are subject to risks and uncertainties that could cause actual results to differ materially from those anticipated in the forward-looking statements. The words "believe," "expect," "intend," "anticipate," variations of such words, and similar expressions identify forward-looking statements, but their absence does not mean that the statement is not forward-looking. These statements are not guarantees of future performance and are subject to risks, uncertainties and assumptions that are difficult to predict. Factors that could affect Onyx's actual results include, but are not limited to the risk that the CRM market does not accept the Onyx products described above, the risk that Onyx is unable to effectively compete in the CRM market, and the "Important Factors That May Affect Our Business, Our Results of Operations and Our Stock Price" described in our annual report on form 10-Q for the period ended June 30, 2002. Readers are cautioned not to place undue reliance upon these forward-looking statements that speak only as to the date of this release. Onyx undertakes no obligation to update publicly any forward-looking statements to reflect new information, events or circumstances after the date of this release or to reflect the occurrence of unanticipated events.

Onyx is a registered trademark of Onyx Software Corp. in the United States and other countries.

*It is anticipated that one or more Linux distributors will support 64-bit Linux in the first half of 2003.

IBM, the e-business logo AIX, AIX5L and pSeries are trademarks of IBM Corporation. The IBM eServer brand consists of the established IBM e-business logo with the descriptive term "server" following it.
UNIX is a registered trademark of The Open Group.
Linux is a trademark of Linus Torvalds.

Contact:

Bob Craig Onyx Software 617-314-6846

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MEDIA CONTACTS

Americas / Corporate Headquarters Mitch Briggs Public Relations Coordinator Consona Corporation Telephone: 317.249.1620 Mobile: 317.829.4210 Europe, Middle East, Africa Richard Furby Managing Director, Onyx UK Telephone: +44 (0) 1344 322 199 Fax: +44 (0) 1344 489 035 Japan Daisuke Sawamura Director, Professional Services Telephone: +81 03 5215 7311