Obsidian Security raises $85 million in a Series D round to scale its platform for securing and governing AI agents used in enterprise and third-party applications. Multiple outlets report the company reaches a $1.1 billion valuation as part of the financing, which places it in “unicorn” territory. The funding is framed as responding to growing demand for tools that help manage new AI-related security risks, including the use of AI agents across complex enterprise environments.

The company’s platform is described as focusing on governing AI agents, helping organizations control and protect agent behavior as they are deployed through different applications and integrations. Reports state Obsidian is used by large enterprises, with claims that it is trusted by companies across sectors such as finance, social media, and telecommunications. One outlet notes adoption across dozens of Fortune 500 companies, while another characterizes Obsidian’s customer base as including some of the world’s largest and most complex organizations.

Across coverage, the main common points are the amount raised, the valuation, and Obsidian’s focus on AI agent security and governance.