Onyx Security raises $113 million in Series B funding, four months after launching publicly, to help companies securely manage AI agents; The cybersecurity startup has now raised $153 million from investors including Bessemer Venture Partners and Cyberstarts

Onyx Security Raises $113M Series B to Control Advanced AI, Quadrupling Revenue since Stealth Launch Four Months Ago

Onyx Security raised a $113m Series B led by Bessemer at about $640m, four months out of stealth, to control the AI agents taking over enterprise work.