Onyx Enterprise CRM Achieves Record-Setting Scalability Performance Benchmark
Third-Generation Internet CRM Suite Tested in Rigorous, Real-World Environment; Achieves 57,000 Concurrent Users and Subsecond Response Times

BELLEVUE, Wash. - Onyx® Software (Nasdaq: ONXS) today announced it has improved the record for CRM enterprise application scalability. The Onyx Employee Portal (OEP) 3.0 scaled to more than 57,000 concurrent users and sustained subsecond user response times in a formal performance benchmark.

"Besides the sheer number of users and transactions per minute, this benchmark is significant because of our real-world approach to testing. We took great care to develop a realistic representation of how businesses actually use CRM software," said Mary Reeder, senior vice president of Research and Development for Onyx. "Although not all companies require this magnitude of scalability, the fact that OEP scales to this degree demonstrates the strength of the platform, which can help our customers get the best possible performance using less hardware. This, in turn, directly lowers their total cost of ownership - regardless of the size of their implementation."

The tests were conducted in partnership with Unisys Corp. and Mercury Interactive Corp. using Mercury's LoadRunner test suite. The tests were conducted at the Unisys ES7000 Performance Center in Tredyffrin, Penn., and used a farm of 8-processor Web/application servers accessing a single 16-processor database server running Microsoft SQL Server 2000 Enterprise Edition on Microsoft Windows 2000 Datacenter Server.

In addition to the virtual use testing, the benchmark included a random sampling of actual physical clients executing the same scenarios. This dual testing environment provided a better understanding of true end-to-end performance characteristics.

The Onyx benchmark demonstrated support for 57,000 simulated concurrent users and performed an average of 15,130 transactions per minute, while sustaining average user response times of approximately 0.33 seconds.

Onyx Enterprise CRM is a third-generation suite of Web-based customer relationship management solutions. Through three audience-specific portals, Onyx Employee Portal, Onyx Customer Portal and Onyx Partner Portal, Onyx Enterprise CRM delivers sales, marketing and service solutions designed to optimize revenue, reduce operating costs, increase shareholder value and establish a competitive advantage.

"Customers rely on benchmarks to ensure that mission-critical systems will meet their business requirements," said Gordon Mangione, corporate vice president for SQL Server at Microsoft Corp. "This latest CRM benchmark was achieved under rigorous conditions designed to mirror the actual business environment and proves Onyx customers can get the most scalable performance with SQL Server 2000, Windows 2000 Datacenter Server and Unisys Enterprise Server ES7000s."

"This test demonstrates how well Onyx Employee Portal, combined with Microsoft SQL Server 2000 and the Unisys ES7000, scales in a fast-paced, large-scale environment, where subsecond response times are critical to providing superior service," said Mike Thomas, vice president, Unisys Global Partners. "It is precisely this type of performance and reliability that led Unisys to partner with Onyx software."

Onyx has published a white paper further detailing the methodology and results of the benchmark. It is available on Onyx.com's web site and can be downloaded here. A complete listing of comparable CRM benchmarks on Microsoft servers is available from Microsoft at http://www.microsoft.com/sql/evaluation/compare/benchmarks.asp.

About Onyx Software
Onyx Software Corp. (Nasdaq: ONXS) is a global supplier of customer relationship management (CRM) enterprise applications that power a company's entire business world, connecting sales, marketing and service organizations with customers, prospects and partners. Through an innovative mix of Internet technology, strategic services and customer commitment, Onyx helps companies create the seamless, branded customer experiences they need to forge competitive advantage and build real business value. Its reliable, scalable, flexible, holistic solutions enable companies to attract, acquire and retain customers and partners across all channels and touch points. Onyx customers include American Express Co., Broadwing Inc., Commerce One Operations Inc., Credit Suisse, Dreyfus Corp., Prudential Investments and The Regence Group. More information can be found at 888-ASK-ONYX, or email info@onyx.com.

This press release contains forward-looking statements, including statements about the ability of Onyx's CRM solutions to optimize revenue, reduce operating costs, increase shareholder value, and establish a competitive advantage. 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 "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 March 31, 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. Other product or service names mentioned herein are the trademarks of their respective owners.

Contact:

Bob Craig Onyx Software 617-314-6846

Amy Fuller Waggener Edstrom Telephone: 425.638.7000

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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