PRESS RELEASE

Sunnyvale, Calif. – September 7, 2010 – Commtouch' (Nasdaq: CTCH) announced that it has closed on the purchase of the Command Antivirus' division of Authentium, Inc., a Florida-based company, as of Friday, September 3, 2010.

“With this acquisition, Commtouch is uniquely positioned to provide a comprehensive Internet security suite to vendors and service providers, including messaging, Web security and antivirus technologies,” said Gideon Mantel, Commtouch’s chairman of the board and chief executive officer. “Since announcing the agreement, we have received a great deal of positive feedback from both Commtouch’s and Command’s customer base. This acquisition is an important step forward in Commtouch’s strategy of expanding its leadership in the Internet security solution market.”

The Command Antivirus product includes technology to protect against viruses, spyware, Trojans, and other threats. It boasts strong detection capabilities coupled with high performance and offers flexible deployment options to OEM vendors and service providers looking to provide their customers with protection against malware, either as a standalone solution or as an additional layer of defense.

“We are excited to welcome the Command team into the Commtouch family and integrate its technology into our portfolio. The dedication of Command’s employees has helped the company to flourish and forge strong relationships with top-tier customers. We are pleased to be enlarging our team with these professionals, who will be based in our new Florida office,” Mr. Mantel continued.

“Commtouch has become a significant player in cybersecurity, with multiple product offerings. This, combined with our global customer base of over 150 OEM partners and service providers, is expected to greatly increase our growth potential and enhance our business going forward.” Mr. Mantel concluded.

For more information about Commtouch, Authentium Command and the acquisition, see http://www.commtouch.com/command-acquisition-faq.

About Commtouch

Commtouch' (NASDAQ: CTCH) provides proven Internet security technology to more than 150 security companies and service providers for integration into their solutions. Commtouch’s GlobalView™ and patented Recurrent Pattern Detection™ (RPD™) technologies are founded on a unique cloud-based approach, and work together in a comprehensive feedback loop to protect effectively in all languages and formats. Commtouch’s Command Antivirus utilizes a multi-layered approach to provide award winning malware detection and industry-leading performance. Commtouch technology automatically analyzes billions of Internet transactions in real-time in its global data centers to identify new threats as they are initiated, enabling our partners and customers to protect end-users from spam and malware, and ensure safe, compliant browsing. The company’s expertise in building efficient, massive-scale security services has resulted in mitigating Internet threats for thousands of organizations and hundreds of millions of users in 190 countries. Commtouch was founded in 1991, is headquartered in Netanya, Israel, and has a subsidiary with offices in Sunnyvale, California and Palm Beach Gardens, Florida.