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CAMPBELL, CA -- (Marketwire) -- 10/04/12 -- Rainmaker Systems, Inc. (NASDAQ: RMKR), a leading global provider of B2B e-commerce solutions that drive online sales and renewals for products, subscriptions and training for clients and their channel partners, today announced its inclusion in Software Magazine's Software 500 ranking of the world's largest software and service providers.

Rainmaker's global B2B e-commerce platform is a simple, integrated, global solution that marries B2B focused technology with business process and sales expertise. The platform can be enhanced with global telesales agents to maximize revenue and customer satisfaction throughout the entire customer lifecycle.

"We are extremely pleased secure a spot in the Software 500 as one of the world's top software and services companies," said Michael Silton, chairman and chief executive officer. "Our latest e-commerce release and recent major customer wins confirm our strategy of providing e-commerce clients with the only true global e-commerce lifecycle solution for the B2B market."

"The 2012 Software 500 results show that revenue growth in the software and services industry was again healthy, with total Software 500 revenue of $643.6 billion worldwide for 2011, representing approximately 17 percent growth from the previous year's list," says John P. Desmond, editor, Software Magazine.

The Software 500 is a revenue-based ranking of the world's largest software and services suppliers, targeting medium to large enterprises, their IT professionals, software developers, and business managers involved in software and services purchasing.

About Software Magazine and Rockport Custom Publishing
Software Magazine has been a brand name in the high-tech industry for more than 36 years. Softwaremag.com, its Web counterpart, is the online guide to enterprise software and the home of the Software 500 ranking of the world's largest software and services companies. Software Magazine and Softwaremag.com are owned and operated by Rockport Custom Publishing.

Rockport Custom Publishing is a leading integrated media company focusing on technology. For more information, visit: www.rockportpubs.com.

About Rainmaker
Rainmaker Systems, Inc. is a leading global provider of B2B e-commerce solutions that drive online sales and renewal for products, subscriptions and training for our clients and their channel partners. Rainmaker provides these solutions on a consistent, global basis supporting multiple payment methods, currencies and language capabilities. For more information, visit http://www.rainmakersystems.com or call 800-631-1545.

NOTE: Rainmaker Systems, the Rainmaker logo, are registered with the U.S. Patent and Trademark Office. All other service marks or trademarks are the property of their respective owners.