Company news
Onyx Security Raises $113M Series B to Control Advanced AI, Quadrupling Revenue Since Stealth Launch Four Months Ago
Published 19 September 2026
WHAT HAPPENED
Onyx Security raised $113 million in a Series B funding round led by Bessemer Venture Partners. The AI control company has now raised $153 million total since its founding two years ago.
WHO IS INVOLVED
Onyx Security secured funding from Bessemer Venture Partners along with participation from Cyberstarts, TCV, Conviction, FirstMark, Vintage, QuantumLight, and G Squared.
WHY IT MATTERS
The company quadrupled its revenue in just four months after emerging from stealth, demonstrating strong market demand for AI control capabilities as enterprises seek to manage advanced AI systems.
How it compares
Larger than 95% of the 164 Series B rounds on the Mandos record since 2023.
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- Amount
- $113M
- Round
- Series B
- Investors
- Bessemer Venture Partners
- Type
- Mega round
- Category
- AI Security
- Source
- financialit.net ↗
Other recent cybersecurity rounds
Infisical
