KLOCWORK'S LEADING STATIC ANALYSIS SOLUTIONS RECEIVE "Ready For IBM Rational" Software VALIDATION

Klocwork's Enterprise Development Suite Provides Software Quality and Software Security Assurance to Rational Developers

BURLINGTON, Mass. - December 5, 2006 - - Klocwork Inc., a proven leader in automated software solutions that improve software security and quality, today announced the K7.5 Enterprise Development Suite has received Ready for IBM Rational Software validation. The validation enables IBM Rational developers and customers to feel assured in using Klocwork's static analysis solutions within their platform to detect potential code defects and security vulnerabilities. A long time supporter of IBM products and solutions, Klocwork collaborated with IBM in achieving this extensive and rigorous validation process.

As an IBM Business Partner participating in the Ready for IBM Rational software validation program, Klocwork's Enterprise Development Suite is now validated for integration to the Rational Software Delivery Platform V7, desktop products. The Ready for IBM Rational software offering validates that integrations between IBM Business Partner products and Rational products meet IBM's requirements for interoperability and user experience. As a validated product, Klocwork's Enterprise Development Suite will now bear the Ready for IBM Rational logo as an assurance to customers of their compliance.

"As a long time supporter of IBM Rational, we were extremely pleased when Klocwork achieved Ready for IBM Rational software validation," said Ian Gordon, VP of Product Management of Klocwork. "The validation process was thorough and the validation solidifies that Klocwork is a partner of choice for quality and security analysis amongst customers and partners of IBM. This validation further illustrates why industry leaders continue to turn to Klocwork for their security and quality assurance needs."

Klocwork recently announced the launch of K7.5 which furthers the company's leadership position as the only enterprise-grade static analysis product suite to support both Java and C/C++ - based software development environments. K7.5 expands Java source code analysis capabilities with the addition of a total of 66 new Java Checkers (17 security and 49 quality defect checkers). In addition, K7.5 includes JSP conversion capability, which detects errors in the Java Server Pages used by many organizations.

Klocwork has realized strong business momentum in 2006 by increasing its customer base to 125 and successfully doubling its client roster for two consecutive years. Klocwork clients include: Avaya, Barclays Bank, Bose, Cisco Systems, Iskratel, Motorola, Qualcomm, Texas Instruments, and the United States Army. In addition, Klocwork is a primary contributor to g2zero, an online community launched in July 2006 that is dedicated to furthering the discussion on how organizations can improve software quality. With its name derived from the holy grail of software development - "getting to zero" defects and security vulnerabilities - g2zero (http://www.g2zero.com) offers original commentary and analysis as well as links to relevant news, discussions, and other software-quality-related content on the Web.

About Klocwork
Klocwork's automated static analysis products detect and prevent software defects and security vulnerabilities. Our products provide entire development teams with tools to identify the root causes of software quality and security problems, track them throughout their software development process, ensure that they have been removed, and prevent them from reoccurring. Klocwork's patented technology was developed in 1996, and has delivered significant ROI to more than 125 customers - many of them Fortune 500 accounts, known for having the most demanding software development environments in the world. Klocwork is a privately held company with offices in Burlington, Mass., San Jose, Chicago, Atlanta, Dallas, and Ottawa.

Klocwork and the Klocwork logo are registered trademarks of Klocwork, Incorporated in the United States and/or other countries. All other names are trademarks or registered trademarks of their respective companies.