The following organizations are members of Open CSA. New members (organizations and individuals) are invited to join at any time.

Foundational Sponsor-level members

OASIS Foundational Sponsors support the organizational infrastructure, technical work, and outreach programs of the Consortium. OASIS gratefully acknowledges their contributions and applauds their commitment to advancing open standards.

BEA Systems is a world leader in enterprise infrastructure software, providing standards-based platforms to accelerate the secure flow of information and services. BEA product lines — WebLogic®, Tuxedo®, JRockit®, and the new AquaLogic™ family of Service Infrastructure — help customers reduce IT complexity and successfully deploy Service-Oriented Architectures to improve business agility and efficiency.

IBM is the world's largest information technology company, with 80 years of leadership in helping businesses innovate. IBM software offers the widest range of infrastructure software for all types of computing platforms, allowing customers to take full advantage of the new era of e-business.

Primeton is a leading provider of component-oriented software development and operations platforms that help customers drastically cut down project time and improve system reliability. Major banks, telecom operators and equipment suppliers, and government agencies in China and around the world use Primeton products to gain agility in rapidly changing business and regulatory environments. Primeton helps businesses build SOA solutions that support SCA/SDO specifications.

SAP provides business software solutions designed to meet the demands of companies of all sizes. The company's products help enterprises around the world improve customer relationships, enhance partner collaboration, and create efficiencies across their supply chains and business operations.

Sun Microsystems, Inc. — Since its inception in 1982, a singular vision — "The Network Is The Computer™" — has propelled Sun to its position as a leading provider of industrial-strength hardware, software and services that make the Net work. Technologies supported by Sun include XML, Java, and the OpenOffice.org community-developed office productivity suite.

Sponsor-level members
IONA
Oracle
Progress Software
Red Hat
Rogue Wave Software
Software AG
TIBCO
Xcalia

Contributor-level members
Cape Clear Software
Siemens AG