April 22, 2004

FOR IMMEDIATE RELEASE

Open Solutions Files Registration Statement for Public Offering of Common Stock

GLASTONBURY, Conn.--(BUSINESS WIRE)--April 22, 2004--Open Solutions Inc. (Nasdaq:OPEN), a provider of integrated enabling technologies for financial institutions, today announced the filing of a registration statement with the Securities and Exchange Commission for a proposed public offering of 4,339,384 shares of common stock. Of the 4,339,384 shares being offered, 1,000,000 shares are being offered by Open Solutions and 3,339,384 shares are being offered by certain stockholders. The registration statement also covers the underwriters' option to purchase up to 650,907 additional shares of common stock from the company to cover over-allotments, if any.

Bear, Stearns & Co. Inc. will act as the lead manager of the offering. When available, copies of the preliminary prospectus relating to this offering may be obtained from Bear, Stearns & Co. Inc., c/o Prospectus Department, 383 Madison Avenue, New York, NY 10179. The registration statement relating to these securities has been filed with the Securities and Exchange Commission, but has not yet become effective. These securities may not be sold, nor may offers to buy be accepted, prior to the time the registration statement becomes effective. This press release shall not constitute an offer to sell or a solicitation of an offer to buy, nor will there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

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(R) relational database, with

Internet banking, cash management, CRM/business intelligence, financial accounting tools, interactive voice response, imaging and loan origination solutions. Open Solutions' full suite of products and services allows banks, thrifts and credit unions 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. For Investor Relations issues please contact David Henderson by email at ir@opensolutions.com or by phone at 860.652.3155. Visit Open Solutions' Internet site at www.opensolutions.com.

Open Solutions Inc.(R) is a registered trademark of Open Solutions Inc. All other company and product names may be trademarks of their respective owners.