Open Architecture, Functionality and System Flexibility Cited as StrengthsGLASTONBURY, Conn. - Pittsfield, Mass.-based Greylock Federal Credit Union, with $848 million in assets, 11 branches and approximately 61,000 members, has selected Open Solutions Inc.'s (NASDAQ: OPEN), The Complete Credit Union Solution(R) (TCCUS) and complementary application technologies to address its in-house enterprise-wide data processing needs. Open Solutions is a provider of integrated enabling technologies for financial institutions across the United States and Canada.

"We believe that the advanced functionality and true open architecture of The Complete Credit Union Solution is impressive and will support our member's needs and our credit union's future growth objectives," said Kent Hudson, SVP of Greylock Federal Credit Union. "This type of open system offers added flexibility that will allow us to offer more advanced products and services to our members. It will help us to better compete in an ever changing marketplace. Open Solutions truly has a superior technology."

Greylock Federal Credit Union received its first charter in 1935 and became federally-chartered in 1995. Greylock currently serves the Berkshire County, Mass. area and supports the motto, "Member Owned, Value Driven." The credit union brings additional value to its membership by offering numerous educational programs such as Consumer Credit Counseling Services, Education Resource Center, and Home & Family Finance Resource Center.

Open Solutions' product platform was designed to be an open architecture application, creating the flexibility needed for running a member service-oriented financial institution. In addition to The Complete Credit Union Solution core data processing platform, the credit union will also implement Open Solutions' FTI Financial Accounting Suite; commercial and mortgage lending; premium overdraft and cView(TM) relationship management tool.

"Over the past year, we've seen an increased number of former Re:Member Data Services (RDS) clients adopting our open technology. We believe these credit unions are sensing the winds of change and are making the move to an open, flexible solution that will grow with them," said Gary Daniel, SVP & GM, Open Solutions Credit Union Group.

"We understand and appreciate that Greylock Federal Credit Union is dedicated to providing innovative products and services to more effectively serve its members and to better meet its own strategic objectives," said Louis Hernandez, Jr., chairman and CEO of Open Solutions. "Open Solutions' goal is to offer advanced technology and a flexible enterprise platform from which financial institutions can leverage the tools to expand, better compete and ultimately provide superior member service. We look forward to working with Greylock and believe our product suite will be instrumental in helping the credit union reach its business and member-focused goals."

The Complete Credit Union Solution is built on a powerful Oracle(R) relational database, designed to be an open, flexible and scalable platform. Open Solutions offers a full suite of real-time enabling technology, built around a core data processing solution and integrated across all delivery platforms. The product suite helps financial institutions increase their product offerings, streamline operations and better manage the member relationship by providing an entire member view instead of a traditional account level view.

About Open Solutions Inc.

Open Solutions Inc. offers a fully featured strategic product platform that integrates core data processing applications built on a single centralized Oracle relational database, with Internet banking, cash management, CRM/business intelligence, financial accounting tools, imaging, Check 21, interactive voice response, network services, Web hosting and design services, and payment and loan origination solutions. Open Solutions' full suite of products and services allows banks, thrifts, credit unions and financial services providers in the United States and Canada to better compete in today's aggressive financial services marketplace, and expand and tap their trusted financial relationships, client affinity, community presence and personalized service.

For more information about Open Solutions or its financial product line, contact Mickey Goldwasser by email at mgoldwasser@opensolutions.com by phone at 860.652.3153 or via fax at 860.652.3156. Visit Open Solutions' Internet site at www.opensolutions.com.

Open Solutions Inc. and The Complete Credit Union Solution are registered trademarks of Open Solutions Inc. All other company and product names may be trademarks of their respective owners. Copyright 2006 Open Solutions Inc. All rights reserved.

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Statements made in this press release that state Open Solutions Inc.'s or management's intentions, beliefs, expectations, or predictions for the future are forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. Readers are cautioned that these statements are only predictions and may differ materially from actual future events or results. All forward looking-statements are only as of the date of this press release and Open Solutions Inc. undertakes no obligation to update or revise them. Such forward-looking statements are subject to a number of risks, assumptions and uncertainties that could cause Open Solutions Inc.'s actual results to differ materially from those projected in such forward-looking statements. For example, if we fail to adapt our products and services to changes in technology or in the marketplace, we could lose existing clients and be unable to attract new business. Factors which could cause our actual results to differ materially from those projected in forward-looking statements include, without limitation, economic, competitive, governmental and technological factors affecting the banking and credit union industry and/or Open Solutions Inc.'s operations, markets, products, services, prices and other factors set forth under the heading "Factors Affecting Future Operating Results" in Open Solutions' Quarterly Report on Form 10-Q for the three months ended March 31, 2006, as filed with the Securities and Exchange Commission.