Onyx Security has launched with $40m in funding as it seeks to address emerging risks tied to the rapid adoption of agentic artificial intelligence across organisations.
The company confirmed it raised $40m from investors including Conviction Partners and Cyberstarts. The funding accompanies the firm’s public launch and positions the business to capitalise on growing enterprise demand for tools capable of monitoring and controlling increasingly autonomous AI systems.
Onyx Security is developing what it describes as a secure AI control plane designed to oversee the deployment and operation of AI agents within enterprises. As organisations integrate AI agents into workflows spanning engineering, customer service and internal operations, these systems are gaining access to critical infrastructure and sensitive information. However, their ability to operate autonomously introduces new operational and cybersecurity risks, including reasoning errors, hallucinations and potential manipulation through malicious prompts.
To address these challenges, the company’s platform is designed to continuously discover AI agents operating within an organisation, monitor each stage of their reasoning processes and approve, modify or block actions when necessary. By doing so, the system aims to ensure enterprises can enforce governance and security policies while still enabling rapid adoption of AI-driven automation.
The new funding will support the development and expansion of the platform as Onyx Security seeks to help organisations safely integrate AI agents into business operations. The company aims to provide enterprises with the tools needed to govern AI activity, manage emerging risk exposure and maintain visibility over how autonomous systems interact with internal infrastructure.
Beyond security teams, the platform is intended to deliver value across several areas of the enterprise. Governance teams can use it to support compliance with security standards and regulatory requirements, while infrastructure teams gain tools to manage AI agents and model context protocols more efficiently. Executives can also track and measure AI adoption across the organisation, allowing them to set targets and oversee responsible implementation.
The system is powered by proprietary AI models and supervisory agents built specifically to interpret AI reasoning in real time. These agents can intervene when necessary, blocking risky actions, requesting human approval or redirecting AI behaviour to ensure it aligns with organisational policies.
Onyx Security co-founder and CEO Maxim Bar Kogan said, “Every enterprise is becoming an agent operator — whether they planned to or not. 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.”
Sarah Guo, founder of Conviction Partners, said, “Maxim and Gil saw the need for an AI control plane before the market did. 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.”
Hila Zigman, partner at Cyberstarts, said, “The shift of organizations toward a world in which AI systems become part of their operational infrastructure creates an entirely new attack surface. 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.”
The company was founded by cybersecurity specialist Maxim Bar Kogan and AI researcher Gil Elbaz. Bar Kogan previously served in Unit 8200 of the Israel Defense Forces and has held leadership roles across cybersecurity and enterprise technology. Elbaz previously worked closely with the CTO of Nvidia and was also part of one of the IDF’s AI research units.
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