Venture capital firm Sequoia Capital has significantly increased its investment in Cymphony, a startup focused on securing AI agents within enterprise environments, by co-leading a $30 million Series A funding round that values the company at over $100 million. This follows an earlier undisclosed seed investment from Sequoia. Cymphony aims to address the emerging security risks posed by AI agents, which, unlike human employees, often bypass standard access and identity controls while handling large volumes of sensitive corporate data, complicating tracking and management for enterprises.

Cymphony’s solution involves a “workforce graph” that integrates identity, data, and activity signals to provide security teams with a unified view of both human and non-human entities, including AI agents, and the systems and data they can access. The platform not only identifies security risks—such as unauthorized access by AI tools to sensitive files or unsanctioned AI instances exploiting existing access permissions—but also employs AI agents to investigate incidents, prioritize remediation tasks, and automate certain security actions. Despite entering a competitive market, Cymphony distinguishes itself by treating identity and data security as interconnected challenges, particularly as AI agents exhibit dynamic behaviors and capabilities that traditional security systems, designed for static human roles, struggle to govern.

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