Onyx Security, a Tel Aviv and New York-based startup, closed a $113 million Series B round on July 29, reaching a valuation of roughly $640 million after just two years in operation. The company built an « AI control plane » featuring the « Guardian Agent » that monitors and secures over 1.1 million AI agents covering 1.8 million employees, having analyzed 66.2 million sessions to date. Since emerging from stealth mode in March 2026, Onyx quadrupled its revenue in four months. Total funding now exceeds $153 million, with Bessemer Venture Partners leading the round. The company has no crypto or blockchain component.
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