Onyx Security has emerged from stealth with a $40 million funding round led by Conviction and Cyberstarts. The company is building the secure AI control plane designed specifically for the agentic era, enabling enterprises to safely adopt, manage, and govern increasingly autonomous AI agents at scale.
AI agents are rapidly becoming integral to enterprise operations across engineering, customer service, and other functions. While they drive transformation, their autonomy introduces significant risks—including unintended actions from errors or compromise through adversarial prompts. Legacy security solutions, built for predictable applications and human workflows, lack the visibility and control needed for these “digital employees.”
“Every enterprise is becoming an agent operator — whether they planned to or not,” said Maxim Bar Kogan, Co-Founder and CEO of Onyx. “Agents are given access to the most critical systems in the enterprise, but what are our guarantees they will not make serious mistakes or get compromised? How do we decide what systems are off limits for agents, or what are the requirements to access them? The safe adoption of AI agents requires security from attacks, as well as ensuring agents don’t make critical mistakes.”
Onyx’s unified platform delivers real-time oversight by supervising agent reasoning and intervening when necessary—blocking actions, enforcing human-in-the-loop approvals, or redirecting behavior. This turns autonomous agents into governed, accountable participants in enterprise workflows while maintaining productivity.
Security teams gain essential visibility, posture management, and runtime protection against emerging threats. Governance teams can meet regulatory and compliance standards more effectively. Infrastructure teams benefit from easier support of AI agents and model context protocols (MCPs), along with optimization for cost, accuracy, and latency. Executives receive measurable insights into AI adoption, goal-setting, and progress tracking to drive responsible innovation.
“Maxim and Gil saw the need for an AI control plane before the market did,” said Sarah Guo, Founder of Conviction Partners. “While most of the industry was still focused on data loss in chatbots, they predicted that the risk surface of agents was going to be critical. Onyx is the control plane all enterprises will need as they scale to thousands of agents.”
“The shift of organizations toward a world in which AI systems become part of their operational infrastructure creates an entirely new attack surface,” said Hila Zigman, Partner at Cyberstarts. “These are not just software tools to be protected – they are systems that make decisions, access sensitive information, and are integrated into critical business processes. From the very first moment, it was clear to us that Maxim and Gil understand the depth of this change and are building a solution designed for the AI era, rather than trying to adapt legacy tools to a new reality. We believe the Onyx team is exceptionally well-positioned to become a market leader in AI security for large enterprises.”
Co-founders Maxim Bar Kogan (cybersecurity veteran, former Unit 8200) and Gil Elbaz (AI researcher, ex-Nvidia, former IDF AI unit) bring complementary expertise to address this emerging category. With strong early traction among Fortune 500 clients, Onyx is positioned to lead secure AI agent governance as adoption accelerates.
About Onyx Security
Onyx Security accelerates enterprise AI adoption, securely. The company’s secure AI control plane offers a single platform to serve security, governance, and infrastructure teams as they oversee how AI agents are used, ensure they are secure and compliant, and measure their effectiveness. Powered by its proprietary models and agentic technology, Onyx is already trusted by leading Fortune 500 companies.
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