Palo Alto, Calif.
CEO: Mark Risher
Impermium provides anti-spam technology for social networks. The company sells a subscription-based Web service that prevents and mitigates most types of suspicious and abusive transactions. The company offers real-time and batch monitoring of Web transactions. The company's RESTful Web services-based technology was developed by founders Mark Risher and Vish Ramarao, both former leaders of the Yahoo anti-spam and security teams. Impermium defines social spam as any unwanted content on a social network or in user-generated content sites. Among the abuses Impermium's service prevents are password hacking, malware placement, fake follower and friending schemes, account takeovers and bogus registration.