# Onyx Security

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/onyx-security

- Industry: IT Security/Cybersecurity
- Headquarters: New York, US
- Website: www.onyx.security
- Total disclosed funding: $153M
- Latest round: Series B (Jul 29, 2026)
- Investors on record: 8

## About

Founded in 2024 by CEO Maxim Bar Kogan and Gil Elbaz and headquartered in New York, US, Onyx Security Inc specializes in securing artificial intelligence applications across enterprises. In July 2026, Onyx Security Inc raised USD 113 million in series B funding led by Bessemer Venture Partners, with participation from TCV, FirstMark, Vintage Investment Partners, QuantumLight, G Squared, Cyberstarts and Conviction. The series B funding values Onyx Security Inc at USD 640 million post-money.

Onyx delivers a comprehensive suite of solutions designed to manage and secure artificial intelligence (AI) agents and models across enterprise environments. Their core offering, the Onyx Control Plane, acts as a secure framework that enables organizations to govern AI adoption effectively while ensuring compliance with security standards. This platform provides functionalities such as AI observability, allowing organizations to track sanctioned and shadow AI usage by monitoring prompts, responses, and actions taken by AI agents. Additionally, Onyx emphasizes AI security by identifying vulnerabilities and enforcing real-time safeguards, along with governance features that facilitate regulatory compliance through user-defined policy controls. The company primarily serves sectors with high AI adoption rates, including finance, healthcare, and technology, targeting clients globally in North America, Europe, and Asia-Pacific markets.

Onyx's revenue is generated through subscription-based models for its various products and services, including the Onyx Control Plane and the Onyx Guardian Agent. Customers engage with the company by signing contracts that grant them access to these platforms, which can be customized according to their organizations' specific needs. The pricing structure typically varies based on the scale of deployment and the complexity of the services utilized. Onyx collaborates closely with enterprise clients to provide tailored solutions that enhance AI governance and security.

The company plans to use the July 2026 funding to train the next generation of proprietary models and scale enterprise go-to-market operations in the United States and globally.

## Funding rounds

- Series B, Jul 29, 2026, $113M — TCV, Vintage Investment Partners, Bessemer Venture Partners, FirstMark Capital, G Squared, Cyberstarts, QuantumLight, Conviction
- Series A, Mar 12, 2026, $35M — Conviction
- Seed, Jun 30, 2024, $5M — Cyberstarts

## Investors

- Cyberstarts (https://capitalatlas.ai/funds/cyberstarts) — Seed, Series B
- Conviction (https://capitalatlas.ai/funds/conviction) — Series A, Series B
- TCV (https://capitalatlas.ai/funds/tcv) — Series B
- Vintage Investment Partners (https://capitalatlas.ai/funds/vintage-investment-partners) — Series B
- Bessemer Venture Partners (https://capitalatlas.ai/funds/bessemer-venture-partners) — Series B
- FirstMark Capital (https://capitalatlas.ai/funds/firstmark-capital) — Series B
- G Squared (https://capitalatlas.ai/funds/g-squared) — Series B
- QuantumLight (https://capitalatlas.ai/funds/quantumlight) — Series B