Runtime identity security that enforces policy inline across every authentication

Silverfort was founded in 2016 in Israel by Hed Kovetz, Yaron Kassner and Matan Fattal, all alumni of the IDF's Unit 8200, and has since raised a reported $222M across four rounds, the most recent a Series D led by Brighton Park Capital. Its technical premise is that the hardest identities to protect are the ones no modern control can reach: service accounts, legacy on-premises applications, command-line administrative tools, file shares, and industrial systems that predate any notion of conditional access. Rather than asking those systems to change, Silverfort integrates with the authentication infrastructure itself.

The platform observes identity requests across Active Directory, cloud identity providers, SaaS, custom applications and OT environments, and resolves each one against the full context of the request before deciding to allow, challenge or block it. That placement produces two outputs at once. The first is discovery: a map of every human, machine and AI agent identity in the environment, including service accounts whose owners and dependencies are usually undocumented. The second is enforcement: MFA, conditional access and risk-based policy applied to resources that were never built to support them. The company says it processes roughly ten billion authentications a day for more than 1,000 organisations, and it recently acquired Fabrix Security.