Onyx raises $113M to govern enterprise AI agents

Onyx Security raised a $113 million Series B and says its Secure AI Control Plane already watches more than 1.1 million agents across 66 million AI sessions in real time. Onyx says the system discovers agents and inspects actions across browsers, endpoints, SaaS, and cloud infrastructure before they take effect. The round puts startup capital behind the enforcement layer adjacent to Snowflake’s bid to govern agent identities and tool access; operators should treat runtime inspection as a distinct control from model guardrails or static permissions.