Onyx Security Raises $113M Series B Led by Bessemer
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- Onyx Security raised a $113M Series B led by Bessemer Venture Partners, bringing the company's total funding to $153M
- Onyx Security emerged from stealth only four months ago and is headquartered in Israel, making the size and speed of the round notable for such a young company
- Onyx's platform enables enterprises to deploy AI agents securely, and the startup is publicly betting that securing AI agents will become one of the defining problem areas in enterprise security
- Bessemer Venture Partners led the round, attaching a major institutional venture brand to a category — AI-agent security — that has only recently emerged as a standalone funding vertical
Why it matters: Onyx went from stealth to a nine-figure round led by Bessemer in just four months, a pace that signals institutional conviction that AI-agent security is becoming a standalone, high-priority enterprise category rather than a feature inside existing appsec or identity platforms.
