Onyx Security announced a $113 million Series B led by Bessemer Venture Partners, with Cyberstarts, TCV, Conviction, FirstMark, Vintage, QuantumLight, and G Squared, taking total funding to $153 million. The New York and Tel Aviv firm sells a control plane that discovers agents and inspects actions before they execute across browser, endpoint, SaaS, and cloud surfaces. It reports more than 1.1 million agents secured and 66 million sessions inspected after a fourfold revenue jump since stealth. Why it matters: agent adoption is outrunning governance. Caveat: session counts are self-reported and depend on where traffic is routed.