Onyx raises $113M Series B at $640M valuation four months after leaving stealth
What's the deal? Onyx SecurityDealroom has a profile for this one. Try Dealroom → has raised $113 million in a Series B round led by Bessemer Venture Partners, valuing the AI security startup at an estimated $640 million. The financing comes just four months after Onyx emerged from stealth with $40 million — a $5 million seed and a $35 million Series A.
What does it do? Founded in 2024, Onyx builds a platform that lets enterprises deploy AI agents securely by managing permissions, monitoring agent activity, and flagging risks from autonomous systems. It now employs more than 80 people across Israel, the US, and Canada, and counts several Fortune 500 firms as customers.
Why now? Chief executive officer Maxim Bar Kogan said demand after leaving stealth outpaced expectations. "Coming out of stealth marked the point at which we could begin selling broadly," he said, adding that early traction "allowed us to raise this round much sooner than expected."
What's the endgame? The new capital will fund development of Onyx's next-generation AI models and expand its sales and marketing in the US and other markets. In June, AnthropicDealroom has a profile for this one. Try Dealroom → said it had integrated Onyx's technology to help enterprise customers adopt AI securely.
The signal: Investors are betting that securing AI agents becomes a distinct cybersecurity market. "Trillions of dollars are being invested in AI, and the companies that help enterprises deploy it safely will be worth billions," Bar Kogan said — a thesis echoed by Cyberstarts partner Hila Zigman, who called it "one of the most important cybersecurity categories of the coming decade."
Read more: Calcalist
Image credit: Generated with Gemini
