Date published: 01.09.08 - not release date

Guidance Software’s eDiscovery EnCase® Enterprise Solutions Now Deployed on More Than 10 Million Desktops, Laptops and Servers Worldwide

Company reaches milestone as organizations continue to bring eDiscovery in-house and seek solutions that address data loss prevention and other digital investigations

PASADENA, Calif., June 16, 2008 – Guidance Software Inc. (NASDAQ: GUID), the World Leader in Digital Investigations™, today announced that EnCase® Enterprise, the industry standard platform for network-enabled digital investigations, has been deployed on more than 10 million desktops, laptops and servers on its customers’ networks worldwide. EnCase Enterprise is used by over 500 commercial and government customers, including more than 100 of the Fortune 500 and over half of the Fortune 50.

Guidance Software’s remarkable growth in the enterprise follows a decade of success in computer forensics, where more than 27,000 copies of EnCase software have been used in millions of cases worldwide. Indeed, EnCase software has an unmatched level of court validation which drives demand for it in the corporate, government and law enforcement arenas.

Guidance Software has also achieved immense success with EnCase® eDiscovery. Since its introduction in late 2005, EnCase eDiscovery has been licensed by over 125 customers and has been deployed on more than 2 million desktops, laptops and servers worldwide. With EnCase eDiscovery, customers search, collect, preserve and process data for litigation matters, and do so in a scalable, defensible fashion.

Guidance Software’s EnCase Enterprise customers include Home Depot, Ford, Lowe’s, Bristol-Myers Squibb, General Electric, OfficeMax, Viacom, and United Health Group, as well as global customers such as British Telecom, Rolls-Royce Group plc, Novartis International AG and Vodafone Group PLC.

“Guidance Software has spent a decade developing software solutions that are proven, credible and defensible,” said Victor Limongelli, President and Chief Executive Officer of Guidance Software. “The millions of computers addressed by EnCase Enterprise and EnCase eDiscovery reflect our success in meeting the needs of enterprise customers, who require solutions that properly address their eDiscovery and other digital investigation requirements.”

Guidance Software recently received the highest possible* rating in Gartner’s MarketScope for E-Discovery and Litigation Support Vendors, 2007. The Gartner report is available, compliments of Guidance Software at www.guidancesoftware.com.

About Guidance Software
Guidance Software is recognized worldwide as the industry leader in digital investigative solutions. Its EnCase® platform provides the foundation for government, corporate and law enforcement organizations to conduct thorough, network-enabled, and court-validated computer investigations of any kind, such as responding to eDiscovery requests, conducting internal investigations, responding to regulatory inquiries or performing data and compliance auditing - all while maintaining the integrity of the data. There are more than 27,000 licensed users of the EnCase technology worldwide, and 1000's attend Guidance Software's renowned training programs annually. Validated by numerous courts, corporate legal departments, government agencies and law enforcement organizations worldwide, EnCase has been honored with industry awards and recognition from eWEEK, SC Magazine, Network Computing and the Socha-Gelbmann survey. For more info about Guidance Software, visit www.guidancesoftware.com.

*Gartner’s highest possible MarketScope rating is “Strong Positive.”

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Monique Chambers
Devonshire Marketing
0203 239 9722
monique@devonshiremarketing.com