San Ramon, Calif., July 23, 2007 -- Sabrix®, Inc. today announced that it has selected OpSource as its software-as-a-service (SaaS) hosting partner for the Sabrix Managed Tax Service (Sabrix MTS), the industry's first complete, outsourced sales and use tax compliance service. The OpSource On-Demand^SM Web application delivery platform operates with controls, processes and procedures that have earned SAS 70 Type II certification, ensuring that all Sabrix MTS clients are afforded the highest level of security, availability, and reliability available in on- demand applications.

Recently introduced, Sabrix MTS provides finance and tax professionals in small- to mid-market companies with a complete, outsourced sales and use tax service which eliminates the hassle, reduces the cost, and limits audit exposure of tax compliance. Sabrix MTS combines an on- demand version of Sabrix's proven enterprise tax management software with the services of tax experts, operating as an extension of a company's finance department to manage the mission critical process of tax compliance. Sabrix tax experts use the company's proven software and tax research hosted on OpSource's SAS 70 Type II environment to securely and reliably deliver comprehensive tax compliance, addressing the needs of both finance and IT.

SAS 70 is an internationally recognized auditing standard developed by the American Institute of Certified Public Accountants (AICPA) to report on a third-party service provider's operational controls and their effectiveness. SAS 70 audits are important in an environment of increased business process outsourcing and Sarbanes-Oxley compliance.

"CFOs want assurance that their tax compliance will be managed effectively, even as their business grows," said Steve Adams, CEO of Sabrix. "With Sabrix MTS, we are committed to applying the most stringent controls to all of the business processes in the transaction tax lifecycle - both tax and IT. CFOs enjoy the comfort and security that they need to entrust their compliance to us. Our thorough evaluation of the market concluded that OpSource On-Demand was the solution to provide the SAS 70 Type II certified hosted operations required to meet the security, availability, and reliability demands that CFOs and their IT teams require. The combination of Sabrix's SAS 70 certified tax research with OpSource's SAS 70 certified hosted operations offers independent auditor verification that our processes and controls meet stringent requirements."

Treb Ryan, CEO of OpSource, added: "We are pleased to be working with Sabrix to deliver its industry-leading tax management solution via an outsourced model to small- and medium-sized businesses. Many outsourced software solutions are SAS 70 Type I certified; however, by teaming with OpSource, Sabrix delivers the only managed tax solution in the industry that is SAS 70 Type II certified. Not only will customers benefit from the highest levels of security and reliability, but they are likely to reduce their overall auditing costs."

OpSource On-Demand is an award-winning Web application delivery platform for software companies, on-demand businesses, and Web application developers. OpSource On-Demand includes everything necessary for Web application delivery, including hardware, software and systems infrastructure, application management and tuning, and 24x7 customer-branded, end- user support. OpSource provides these services through a unique Success-Based Delivery Model which includes unit-based pricing. Unit-based pricing allows businesses like Sabrix to begin with a minimum commitment, and ensures that ongoing increases in revenue will always precede future increases in service delivery cost.

About OpSource
OpSource™, the SaaS delivery experts, is focused on providing the operational infrastructure and ongoing services that enable software companies, on-demand businesses, and Web application providers to deliver and maintain the highest quality Web-based solutions. By choosing OpSource as a SaaS partner, OpSource customers are freed from infrastructure management and can focus on improving applications and acquiring new customers. The OpSource On-Demand^SM infrastructure enables businesses to deploy SaaS and Web-based applications quickly, cost effectively, securely, and with high quality standards. Companies at any stage in the application lifecycle, delivering any type of application, can benefit from OpSource's comprehensive services and expertise. OpSource is the only company to offer Success-Based Pricing^SM, a unit-based pricing model that allows businesses to begin with a modest minimum commitment with expenses scaling only when their revenues increase. For more information about OpSource, visit opsource.net.