REDWOOD CITY, CA -- (MARKET WIRE) -- 02/15/07 -- Reactivity® Inc., the leading vendor delivering on the promise of SOA, today announced that Reactivity has been chosen by CheckFree Corporation (NASDAQ: CKFR) for its SOA infrastructure and Web service delivery. Reactivity's Gateway serves as a mediation engine that manages, secures and accelerates Web services designed for CheckFree clients, simplifying the front-end development and deployment.

CheckFree supports the electronic billing and payment services of more than 2,000 banks, brokerages and credit unions. Reactivity's Gateway product will be used to support the functionality of CheckFree Builder(TM), an open Web services solution that enables financial institutions to build customized online offerings that integrate electronic billing and payment, financial management capabilities and other transaction and banking data into a single site.

The SOA infrastructure enabled by Reactivity's Gateway product transforms how businesses process information while continuing to make the end-user experience feel increasingly seamless. The process empowers business application developers to build robust Web services without having to directly manage aspects such as transport and XML (Extensible Markup Language) message-based security, performance acceleration, and operational controls. XML is a flexible way to create common information formats and share both the format and the data electronically.

"The Reactivity Gateway is the centerpiece of our client-facing XML infrastructure," said John Horn, senior security analyst, CheckFree Corporation. "Our evaluation and testing showed us that the Reactivity XML appliance was an excellent platform to deliver robust and secure Web services to our clients. Additionally, Reactivity's performance was assessed as superior in our core product use cases. As we move into production, we expect this technology to dramatically impact the delivery of Web services to our client base."

"The work that CheckFree is doing in SOA is another powerful example of how Reactivity is enabling Web service and SOA development and deployment in enterprises today," said Bill Messer, president and COO of Reactivity, Inc. "The flexibility that CheckFree will be able to offer customers with customizable Web services will help as the Company continues to transform the electronic payment industry."

Reactivity offers the only scaleable, comprehensive and cost-effective solution for infrastructure-enablement capabilities that customers are demanding. The ability to provision, manage and control standards throughout the infrastructure is critical for future success of SOA environments. Today's XML appliances move beyond the security challenge and enable the creation, integration and enforcement of SOA policies throughout the infrastructure.

Reactivity's products enable SOA delivery at some of the largest organizations in the world while reducing management complexity and the cost of maintenance. At the same time, the reliability and serviceability have increased through usage of Reactivity technology. Global 1000 organizations continue to recognize that Reactivity's solutions are the premier choice for companies who want to realize the full promise of SOA. Today, Reactivity customers are conducting billions of dollars in XML transactions each month.

About Reactivity

Companies rely on Reactivity for quick and efficient deployment of SOA applications. Reactivity provides organizations with the technology to deploy, control and scale XML and Web Services environments. With Reactivity, customers realize the cost-saving and time-to-market promise of Web services and SOA. Reactivity's products deliver security, reliability, scalability functions in an application-oriented networking layer. Reactivity was the first to introduce XML Firewalls and continues to lead with innovations that simplify and scale XML-based integration and Web service delivery. Reactivity supports WS-Security and all associated security, XML and Web services standards. These appliances deliver 20x performance improvements over application platforms and middleware for XML Schema validation, transformation, and cryptographic operations. Reactivity is an active member of OASIS and WS-I. Reactivity is located in Redwood City, California, and can be reached at http://www.reactivity.com, +1-650-551-7800 or info@reactivity.com.

About CheckFree (www.checkfreecorp.com)

Founded in 1981, CheckFree Corporation (NASDAQ: CKFR) provides financial electronic commerce services and products to organizations around the world. CheckFree Electronic Commerce solutions enable thousands of financial services providers and billers to offer the convenience of receiving and paying household bills online, via phone or in person through retail outlets. CheckFree Investment Services provides a broad range of investment management solutions and outsourced services to hundreds of financial services organizations, which manage about $1.7 trillion in assets. CheckFree Software develops, markets and supports payment processing solutions that are used by financial institutions to process more than two-thirds of the 14 billion Automated Clearing House transactions in the United States, and supports reconciliation, exception management, risk management, transaction process management, corporate actions processing, and compliance within thousands of organizations worldwide.

Certain of the Company's statements in this press release are not purely historical, and as such are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. These include statements regarding management's intentions, plans, beliefs, expectations or projections of the future. Forward-looking statements involve risks and uncertainties, including without limitation, the various risks inherent in the Company's business, and other risks and uncertainties detailed from time to time in the Company's periodic reports filed with the Securities and Exchange Commission, including the Company's Annual Report on Form 10-K for the year ended June 30, 2006 (filed September 8, 2006), Form 10-Q for the quarter ended September 30, 2006 (filed November 8, 2006) and Form 10-Q for the quarter ended December 31, 2006 (filed February 8, 2007). One or more of these factors have affected, and could in the future affect the Company's business and financial results in future periods, and could cause actual results to differ materially from plans and projections. There can be no assurance that the forward-looking statements made in this press release will prove to be accurate, and issuance of such forward-looking statements should not be regarded as a representation by the Company, or any other person, that the objectives and plans of the Company will be achieved. All forward-looking statements made in this press release are based on information presently available to management, and the Company assumes no obligation to update any forward-looking statements.

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