Campbell, Calif. – May 31, 2007 – Rainmaker Systems, Inc. (NASDAQ: RMKR), a leading provider of sales and marketing solutions combining hosted application software and execution services, today announced that Michael Silton, CEO, Alok Mohan, Chairman of the Board, and Steve Valenzuela, CFO, will ring the ceremonial NASDAQ Stock Market Closing Bell on June 5th at the NASDAQ MarketSite on Broadway in Times Square, New York City.

The bell-ringing ceremony will be broadcast on national business television on CNBC, ReutersTV, BloombergTV, and Fox News at 4:00 p.m. Eastern Time and will be webcast live on NASDAQ's website (www.NASDAQ.com) and at NASDAQ's MarketSite broadcast studio in New York City.

"Rainmaker's participation in the NASDAQ market close is both an honor and an acknowledgment of the outstanding performance we have achieved over the past few years, including strong growth, record revenue, and GAAP profitability," said Michael Silton, President and CEO of Rainmaker Systems. "Having met the stringent requirements to move up from the NASDAQ Capital Markets to the NASDAQ Global Market in January was a significant culmination of these achievements. We wish to thank all those who have contributed to our tremendous success, including our employees, clients and stockholders. We look forward to continuing to leverage our unique strengths to create valuable solutions to clients who represent some of the best known brands in the world."

About Rainmaker
Rainmaker Systems, Inc. delivers sales and marketing solutions, combining hosted application software and execution services designed to drive more revenue for our clients. Our Revenue Delivery Platform^SM combines proprietary, on-demand application software and advanced analytics with specialized sales and marketing execution services. Rainmaker clients include large enterprises in a range of industries, including computer hardware and software, telecommunications, and financial services industries. For more information, visit www.rmkr.com or call 800-631-1545.

NOTE: Rainmaker Systems, the Rainmaker logo, Sunset Direct and Contract Renewals Plus are registered with the U.S. Patent and Trademark Office. All other service marks or trademarks are the property of their respective owners.
 
This press release contains forward-looking statements regarding future events. These forward-looking statements are based on information available to Rainmaker as of this date and they assume no obligation to update any such forward-looking statements. These statements are not guarantees of future performance, and actual results could differ materially from current expectations. Among the important factors which could cause actual results to differ materially from those in the forward-looking statements are general market conditions, unfavorable economic conditions, our ability to execute our business strategy, our ability to integrate acquisitions without disruption to our business, the effectiveness of our sales team and approach, our ability to target, analyze and forecast the revenue to be derived from a client and the costs associated with providing services to that client, the date during the course of a calendar year that a new client is acquired, the length of the integration cycle for new clients and the timing of revenues and costs associated therewith, our client concentration given that we are currently dependent on a few significant client relationships, potential competition in the marketplace, the ability to retain and attract employees, market acceptance of our service programs and pricing options, our ability to maintain our existing technology platform and to deploy new technology, our ability to sign new clients and control expenses, the possibility of the discontinuation and/or realignment of some client relationships, and the financial condition of our clients' businesses, and other factors detailed in the Company's filings with the Securities and Exchange Commission, including our filings on Forms 10-K and 10-Q.