Gartner lists these data loss prevention (DLP) purveyors in its Magic Quadrant (which excludes host-based systems):LeadersVontu
Code Green Networks
Fidelis Security Systems
*Other players, depending on the definition of the category, include Centennial, Oakley Networks, Orchestria, Safend and Verdasys, among others. Industry watchers such as Jon Oltsik, senior analyst at Enterprise Strategy Group, expect consolidation, and recent purchases of IronPort by Cisco and Tablus by EMC indicate that bigger companies are starting to dive in.
Read more: Dos and Don'ts for Data Loss Prevention.