Centra Named One of New England's Fastest Growing Technology Companies in Deloitte Technology's 'Fast 50' Program.

LEXINGTON, Mass. -- Centra Included in Prestigious Listing for the Third Consecutive Year

Centra Software, Inc. (NASDAQ: CTRA), a leading provider of specialized solutions, delivering software and services for online business collaboration, announced today that it has been named a winner in Deloitte Technology's prestigious "2004 New England Technology Fast 50", a ranking of the 50 fastest-growing technology companies in the area. Rankings are based on the percentage of revenue growth in the five-year period from 1999-2003. This is the third year in a row that Centra has been named to the "New England Technology Fast 50."

"An unwavering commitment to our customers has contributed to our revenue growth over the years," said Paul R. Gudonis, CEO and president of Centra. "At Centra, we pride ourselves on listening to our customers and providing a complete online business collaboration solution that will help them achieve their business objectives in a cost-effective manner. This is the third year we have been selected for this prestigious award and are thrilled to be recognized as a driving force in the New England technology marketplace."

To qualify for the Technology Fast 50, companies must have had operating revenues of at least $50,000 in 1999 and $1,000,000 in 2003, must be public or private companies headquartered in North America, and be a "technology company" defined as owning proprietary technology that contributes to a significant portion of the company's operating revenues (using other companies' technology in a unique way does not qualify); and/or devoting a significant proportion of revenues to research and development of technology.

Winners of the 20 regional Technology Fast 50 programs in the United States and Canada are automatically entered in the Deloitte Technology Fast 500 program, which ranks North America's top 500 fastest-growing technology companies. For more information on the Deloitte Technology Fast 50 or Fast 500 programs, visit www.fast500.com.

"The Deloitte Technology's New England Technology Fast 50 companies have shown the strength, vision and temerity to grow despite a very challenging technology environment," said Stephen J. DiPietro, co-chair of the 2002 New England Fast 50 and a partner in Deloitte's Technology, Media and Telecommunications practice. "We applaud the successes of Centra and acknowledge their place as one of the very few to accomplish such a fast growth rate over the past five years."

The New England Technology Fast 50 Program is co-sponsored by Wilmer Cutler Pickering Hale and Dorr, and is supported by Mazonson, the American Stock Exchange and Mass High Tech magazine.

About Deloitte

Deloitte, one of the nation's leading professional services firms, provides audit, tax, financial advisory services and consulting through nearly 30,000 people in more than 80 U.S. cities. Known as an employer of choice for innovative human resources programs, the firm is dedicated to helping its clients and its people excel. "Deloitte" refers to the associated partnerships of Deloitte & Touche USA LLP (Deloitte & Touche LLP and Deloitte Consulting LLP) and subsidiaries. Deloitte is the U.S. member firm of Deloitte Touche Tohmatsu. For more information, please visit Deloitte's Web site at www.deloitte.com/us.

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About Centra

Online business collaboration solutions from Centra create workforce efficiencies and enable organizations to share and exchange business-critical information with geographically distributed customers, partners, prospects and employees. Centra's solutions integrate real-time collaboration and departmental business processes with specialized applications that increase sales effectiveness, improve collaborative learning and accelerate enterprise application rollouts and customer acquisition initiatives. Currently available in 12 languages, Centra solutions can be deployed as on-site software or through its ASP service and are supported by an active ecosystem of value-added partners, including Siebel, PeopleSoft, SAP and Deloitte Consulting. Organizations across every major industry and market sector choose Centra, including Wyndham International, Weyerhaeuser, Underwriters Laboratories, BMW and Stanford University. Headquartered in Lexington, Massachusetts, Centra serves a worldwide customer base throughout the Americas, Europe, Asia and Australia. For more information, visit www.centra.com.

Centra is a registered trademark, and Centra 7 is a trademark of Centra Software, Inc. All other trademarks referenced herein are the property of their respective owners.