Campbell, Calif. – December 18, 2007 – Rainmaker Systems, Inc. (NASDAQ: RMKR), a leading provider of sales and marketing solutions combining hosted application software and execution services, today announced that one of its Fortune 500 global network computing clients has named Rainmaker as their exclusive teleservices provider. Rainmaker was awarded the two-year contract extension based on the success of the pilot program for lead development services it has had in place with this Client over the past year.

Under the terms of the expanded agreement, Rainmaker will deploy its proprietary LeadWorks™ platform throughout the Client's entire global footprint to identify, generate, nurture and manage leads from multiple sources, including for the first time the Client's installed customer base. Rainmaker will create, manage and deliver web and phone based sales services in select territories, and will continue to expand globally to drive incremental top line revenue to the Client's sales organization.

Rainmaker will work together with the Client's worldwide field sales account managers and resellers across the Client's full range of products, including systems, storage, software and new service contracts, and will be responsible for cross-sell and up-sell campaigns to existing customers.

"Rainmaker clearly demonstrated that we are the only vendor with the depth of experience and fully-integrated capability to consolidate the Client's telesales strategy on a worldwide basis," said Michael Silton, Rainmaker's CEO. "Our Client recognized our ability to leverage their internal resources and drive incremental growth at a lower cost than otherwise would have been possible. We are pleased they have awarded us this significant piece of their global business."

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.