# AI Security & RegTech startups in the UK

AI companies defending organisations: cybersecurity, AI model security, fraud, financial-crime detection, compliance and identity verification. A strength of the UK ecosystem, close to its financial and regulatory institutions.

11 companies · 14 open UK & remote roles

## Companies

- [Onfido](https://aistartupslist.co.uk/company/onfido.md) · Old Street · Subsidiary. AI document and biometric identity verification, now part of Entrust.
- [ComplyAdvantage](https://aistartupslist.co.uk/company/complyadvantage.md) · Fetter Lane · Series C · 7 roles. AI-driven financial crime and fraud risk detection platform.
- [Mindgard](https://aistartupslist.co.uk/company/mindgard.md) · London · Series A. Platform for testing the security of AI models.
- [Featurespace](https://aistartupslist.co.uk/company/featurespace.md) · Cambridge · Subsidiary. Real-time AI fraud and financial-crime prevention, owned by Visa.
- [Darktrace](https://aistartupslist.co.uk/company/darktrace.md) · Cambridge · Private. Self-learning AI cybersecurity detecting and responding to threats autonomously.
- [Trent AI](https://aistartupslist.co.uk/company/trent-ai.md) · London · Seed. Security platform protecting AI agents from prompt injection, tool misuse and data exfiltration across their lifecycle.
- [Maze](https://aistartupslist.co.uk/company/maze.md) · London · Series A · 1 roles. Deploys AI agents that investigate, triage and remediate cloud and code security vulnerabilities.
- [Gecko Security](https://aistartupslist.co.uk/company/gecko-security.md) · London · Seed. AI security engineer that uses LLMs to find and fix complex business-logic vulnerabilities in codebases (YC F24).
- [Arva AI](https://aistartupslist.co.uk/company/arva-ai.md) · London · Seed · 6 roles. AI workforce automating financial-crime compliance across screening, KYB, KYC and transaction monitoring for banks (YC S24).
- [Cardamon](https://aistartupslist.co.uk/company/cardamon.md) · London · Seed. AI compliance co-pilot helping regulated financial firms ingest regulation and launch products faster (YC W25).
- [Prevalent AI](https://aistartupslist.co.uk/company/prevalent-ai.md) · London · Growth. Founded by ex-GCHQ and Darktrace leaders; turns scattered enterprise data into a knowledge graph that security teams and AI agents can reason over, kept inside the customer's own infrastructure. Profitable and bootstrapped for nine years before raising outside capital.