UK companies using AI to defend software, networks, and data.
Growth London
Builds decision-intelligence software that connects scattered data into a single view for fraud detection, anti-money-laundering and financial-crime analytics. Headquartered in London.
Seed London
A real-time AI governance platform giving organisations visibility and control over how generative and agentic AI is used across their operations: discovering AI assets, assigning ownership and risk profiles, monitoring usage, and keeping an audit trail. Headquartered in London.
Growth London
Provides AI-driven financial-crime detection, screening, and anti-money-laundering compliance tools for banks and businesses. Headquartered in London.
Early-stage Manchester
Builds a change risk management platform for software teams: it continuously monitors code changes, assesses the security risk each one introduces, decides how it should be handled, and validates that it was, leaving an audit-ready record. Aimed at the pace of AI-assisted development. Headquartered in Manchester.
Acquired Cambridge
Develops AI-based cybersecurity software that learns normal network behaviour to detect threats and respond to them autonomously. Headquartered in Cambridge.
Acquired Cambridge
Builds real-time AI fraud-detection and financial-crime software for banks and payment firms, pioneering adaptive behavioural analytics. Headquartered in Cambridge.
Early-stage Oxford
Builds machine-learning software for high-stakes uses in defence, national security, government and insurance. An Oxford University spin-out headquartered in Oxford.
Growth London
Turns fragmented enterprise data into a continuously updated, sovereign knowledge graph that security teams and AI agents can query for context — what it calls a security data fabric. Applied to cybersecurity, exposure management, and wider enterprise AI. Founded by GCHQ alumni and headquartered in London.
Early-stage London
Builds a sovereign infrastructure control layer that lets governments and enterprises govern how their AI systems and critical workloads communicate, access data, and run. Headquartered in London, serving enterprise and defence customers.
AI Score, a London startup, has raised $5.4M (about £4M) in seed funding for a platform that gives companies a live, governed view of every place generative and agentic AI is being used across their operations — an oversight layer for the awkward moment when businesses adopt agents faster than they can control them.
Prevalent AI, a London company founded by GCHQ alumni, has raised its first outside capital — a $22M (about £16M) growth round led by Integrity Growth Partners — nine years after it started and while already profitable. It sells a "data fabric" that turns messy enterprise data into a knowledge graph for security teams and AI agents.
Manchester cybersecurity startup Cytix has raised £5.1M ($7M) in a Series A led by Northern Gritstone, to scale a platform that continuously checks the security risk of every software change, a problem growing fast as AI writes more of the code.
London company Valarian has raised $50M, about £37.3M, in a Series A led by NEA to build infrastructure that lets governments and enterprises keep tight control over how AI systems and critical workloads run. It is NEA's first defence and dual-use investment in Europe.