Commerce One Expands Executive Team with Two Key Appointments.

Business Editors/High-Tech Writers

SAN FRANCISCO--(BUSINESS WIRE)--April 15, 2004

Commerce One, Inc. (Nasdaq:CMRC), the leading provider of Composite Process Management solutions, today announced that Ed Mueller has joined its executive team as senior vice president of marketing and Wain Beard has joined as senior vice president of sales.

Mr. Mueller most recently managed his own strategic marketing consulting practice focusing on fund raising, go-to-market strategies, and lead generation programs for enterprise application and infrastructure software clients. Mueller was also co-founder, president, and CEO of ShortCycles, Inc., a pioneer in the Sales Effectiveness Management (SEM) category. At Commerce One, Mueller is responsible for driving marketing strategy, product marketing, product management, and marketing communications programs.

Mr. Beard was previously with Sybase, Inc. for 15 years. His latest position was senior vice president and general manager of the Americas where he had revenue responsibility of approximately $400M, including license, professional services and customer support. Beard also built the Asian and Latin American markets for Sybase when he was vice president and general manager of Intercontinental Operations. At Commerce One, Beard has worldwide responsibility for all of Commerce One's sales and channel efforts.

"It's with great enthusiasm and confidence that I welcome Ed and Wain," said Mark Hoffman, President and CEO. "Commerce One has tremendous opportunity to develop its business worldwide, and I look forward to leveraging their experience toward accomplishing the Company's goals and objectives."

Consistent with the revised NASDAQ listing standards recently approved by the U.S. Securities and Exchange Commission, Commerce One stated that Mr. Mueller and Mr. Beard each received a grant of 400,000 non-statutory stock options at a $1.00 stock price on April 8, 2004. The options will begin vesting, after an initial six-month period, on a monthly basis over a three-year period and in accordance with the terms of the Commerce One 2004 Inducement Plan.

About Commerce One

From its initial roots in Internet-based software applications, Commerce One has consistently been at the forefront of delivering advanced technologies that help global businesses collaborate with their partners, customers and suppliers over the Internet. Commerce One has defined many of the open standards and protocols established for business networks today and our global customer base includes leaders in a wide range of industries. The Commerce One Conductor platform and industry specific Process Accelerators represent the next generation of business process management solutions that enable enterprises to optimize their existing technology investments and enhance functionality of existing applications and processes. For more information, go to www.commerceone.com.

Forward Looking Statements

This press release includes forward-looking statements within the meaning of the securities laws. These forward-looking statements include statements concerning the Company's expectations regarding its opportunity to grow its business worldwide and the contributions of the two executives to such plans and objectives. These statements reflect the current views and assumptions of Commerce One, and are subject to various risks and uncertainties that could cause actual results to differ materially from expectations. These factors include, but are not limited to, the following: the delay or failure of customers to purchase Commerce One products or services as expected; the risk that the composite process management market does not develop further or gain further importance; the depressed market for new technology investments; various external factors, including economic, political and other global conditions; and various other risks including, without limitation, those discussed in Commerce One's filings with the Securities and Exchange Commission, including its annual report on Form 10-K for the year ended December 31, 2003. The information provided in this press release is current as of the date of its publication. Commerce One expressly disclaims any obligation to release publicly any updates or revisions to any forward-looking statements to reflect any changes in expectations, or any change in events or circumstances on which those statements are based, unless otherwise required by law.