Onyx Security
Category: AI in Cybersecurity
A cybersecurity platform that provides a secure control plane for AI agents and models, enabling enterprises to discover, manage, and secure autonomous AI assets. Onyx Security was founded in 2024. The company is led by Maxim Bar Kogan. Based in New York, United States. Team size: 70+. Total funding raised: $153.0M. Latest round: Series B. Key investors include Conviction, Cyberstarts, Bessemer Venture Partners, TCV, FirstMark, Vintage, QuantumLight, G Squared.
- Founded
- 2024
- Headquarters
- New York, United States
- Team size
- 70+
- Total funding
- $153.0M
Value proposition
Provides a unified enforcement layer that continuously discovers AI agents, monitors their reasoning, and approves or corrects actions in real-time to enforce security and governance policies.
Products and solutions
Secure AI Control Plane, Onyx Guardian Agent, AI Agent Discovery, Posture Management, Runtime Protection
Unique value
Utilizes proprietary supervisory agents and AI models to analyze how other AI agents reason and act, allowing for real-time intervention (block, correct, or require human approval).
Target customer
Enterprise security, governance, and infrastructure teams
Industries served
Cybersecurity, Artificial Intelligence, Enterprise Software
Technology advantage
Extends traditional identity and access management (IAM) concepts to autonomous software agents, providing both visibility and control over AI agent behavior across enterprise systems.
How they differentiate
Provides a secure AI control plane specifically designed for autonomous AI agents, offering real-time discovery, monitoring, and intervention of agent reasoning and actions.
Main competitors
Noma Security, WitnessAI, Armadin
Key partnerships
Fortune 500 enterprise customers, Conviction Partners (Investor), Cyberstarts (Investor), TrueFoundry AI Gateway integration (September 2026)
Notable customers
Fortune 500 companies, Revolut
Major milestones
Founded in 2024 and raised $5.0M Seed round from Cyberstarts, Emerged from stealth in March 2026 with a $35.0M Series A led by Conviction, Launched the Secure AI Control Plane for the agentic era, Announced $113.0M Series B led by Bessemer Venture Partners on July 29, 2026, bringing total funding to $153.0M
Growth metrics
Emerged from stealth with 70+ employees; reported fourfold revenue growth in the four months since launch and adoption by dozens of leading enterprises as of July 29, 2026.
Market positioning
Early-stage enterprise AI security pioneer
Geographic focus
North America, Israel
Patents and IP
No registered patents disclosed as of latest update
About Maxim Bar Kogan
Cybersecurity leader and experienced technology executive who served in Israel's elite Unit 8200 military intelligence unit. Former VP of Product and Engineering at Mixtiles.
Latest news about Onyx Security
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Official website: https://onyx.security/