The round was led by Bessemer Venture Partners, with participation from Cyberstarts, TCV, Conviction, FirstMark, Vintage, QuantumLight and G Squared. This brings the company's total funding to $153M since its founding exactly two years ago.

Onyx Security is the secure AI control plane for the enterprise. Its platform gives security, governance, and infrastructure teams unified control over AI agents, ensuring they operate securely, stay compliant, and deliver measurable business value. Powered by proprietary models and agentic technology, Onyx is trusted by leading Fortune 500 companies to bridge the gap between AI ambition and enterprise security.