BELLEVUE, Wash., and SAN MATEO, Calif. - Onyx Software Corp.(NASDAQ: ONXS), and AvantGo Inc., today announced a strategic alliance to deliver mobile customer relationship management (mCRM) solutions to large, field-based sales and services teams for wireless access to critical customer information anytime, anywhere.

By combining AvantGo mobile infrastructure software and services with Onyx's XML-based platform, the two companies will offer a real-time, wireless solution for the growing mobile market, which according to Goldman Sachs' Mobile Internet study is estimated to be $13 billion by 2005. The integrated solution will enable an organization's mobile professionals to manage contact information, review and update sales opportunities in their pipeline, access urgent service requests, and view customer history via handheld devices.

"For most Fortune 1000 companies, customer management is not simply confined to centralized call centers but is instead a critical function that takes place continuously in the field," said Bill Bunker, vice president of product marketing at Onyx Software. "By combining the power of Onyx's CRM solution with AvantGo's proven M-Business platform, our customers' will have wireless access to critical customer information increasing productivity, strengthening responsiveness and building a tremendous competitive advantage."

As a result of the alliance with Onyx, AvantGo will expand the mCRM capabilities delivered within its existing product suite. Additionally, AvantGo plans to deploy the mobile solution internally to accelerate information exchange across the enterprise for improved efficiency and empowered decision-making for its mobile workforce.

"Onyx and AvantGo are delivering what we believe will be the dominant mCRM solution for large organizations seeking to run their enterprise data and applications from a handheld device," said Michael Kritzman, vice president of channels for AvantGo. "The market demand is real and we think we've got a silver-bullet solution."

About AvantGo
AvantGo Inc., (Nasdaq: AVGO) is the leading provider of infrastructure software and services that power the mobile economy. AvantGo M-Business software enables businesses to increase the value of their corporate information systems by extending existing enterprise applications and critical information to employees, customers and business partners. The company also provides the AvantGo mobile Internet service, a hosted network that enables hundreds of businesses to deliver their content and applications to more than 2 million mobile consumers. AvantGo is a pioneer in delivering real-world solutions for both wireless and off-line use. For more information, please visit www.avantgo.com.

About Onyx Software
OOnyx Software Corp. (Nasdaq: ONXS) is a global supplier of customer-centric e-business enterprise applications that power a company's entire business world, connecting sales, marketing and service organizations with customers and partners. Onyx products deliver the critical functionality needed to attract, acquire and retain partners and customers across all channels and touch points providing the flexibility, reliability and scalability needed to realize a high return on investment and forge a competitive advantage in today's marketplace. Onyx offers the comprehensive mix of technology, strategic services and implementation support to deliver enterprise business value through a branded, seamless customer experience. Onyx customers include American Express, Broadwing, Commerce One, Credit Suisse, Dreyfus, FirstWorld Communications, Portland Trail Blazers, Prudential Securities and Sierra Health Services. Get more information at 888-275-6699, www.onyx.com.

Cautionary Statement
Except for historical information, all of the expectations and assumptions contained in the foregoing are forward-looking statements involving risks and uncertainties. Important factors that could cause actual results to differ materially from such forward-looking statements include, but are not limited to, the ability of the parties to integrate the software and related technologies, possible delays in release of other products and services, the ability of the sales forces to adequately market and sell these products and services, and customer demand for such products and services. For additional information regarding these and other risks associated with the company's business, please refer to the company's reports filed with the SEC.

This press release contains forward-looking statements. 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-K for the year ending December 31, 2000. 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.

AvantGo, AvantGo Enterprise and the AvantGo logo are trademarks of AvantGo Inc. All other trademarks are the property of their respective owners.

Contacts:

Sara Beeler Visitech Public Relations 602.808.9914 Sara@VisiTechPR.com

Karen Logsdon AvantGo Inc. 510.259.4054 klogsdon@avantgo.com

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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