The Times of Israel reported that Onyx Security announced $113 million in financing to build technology for securing and controlling autonomous AI agents. Bessemer Venture Partners led the round, which valued the startup at approximately $640 million, according to the report. Other participants included Cyberstarts, TCV, Conviction, FirstMark, Vintage Investment Partners, QuantumLight and G Squared. The financing brought total funding to $153 million. Founded in 2024 by Maxim Bar Kogan and Gil Elbaz, Onyx addresses enterprise oversight as businesses delegate more workflows to AI systems.