AI security companies in the United Kingdom
8 of the 92 AI security companies we list are based in the United Kingdom. All 8 are private. The oldest, Copper Horse, was founded in 2011.
Companies focused on AI and LLM security in the United Kingdom
4 companies| Company | Based in | Founded | Size | Ownership |
|---|---|---|---|---|
 Fendr Fendr provides AI usage controls for businesses. | London, United Kingdom | 2025 | Private | |
 Outerlimit Outerlimit provides a security and authorization layer for agentic AI systems. | London, United Kingdom | Private | ||
 Sealgate SealGate provides a security gateway that governs how AI agents access company data. | London, United Kingdom | 2025 | Private | |
 Trent AI Provides an AI security engineer that finds and fixes software risks using coding agents. | London, United Kingdom | 2025 | Private |
Also active in AI and LLM security
4 companies| Company | Based in | Founded | Size | Ownership |
|---|---|---|---|---|
 Copper Horse UK security consultancy doing threat modelling, training and research for connected vehicles, IoT and mobile products. | Monmouth, United Kingdom | 2011 | Private | |
 Immersive Labs Immersive Labs sells a platform called Immersive One that helps organisations show how ready they are for cyber threats. | Bristol, United Kingdom | 2017 | Private | |
 Soken Soken is a Web3 services firm based in London. | London, United Kingdom | 2023 | Private | |
 42Crunch 42Crunch provides security governance for MCP servers and APIs used by AI agents. | London, United Kingdom | Private |
More AI security companies
All 92 AI security companiesEvery cybersecurity company in the United Kingdom · See every category