01Identity AI
Onfido
AI document and biometric identity verification, now part of Entrust.
Old StreetSubsidiary
Sector · United Kingdom
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.
14
Companies
24
UK & remote roles open
02Financial-Crime AI
ComplyAdvantage
AI-driven financial crime and fraud risk detection platform.
Fetter LaneSeries C
03AI Security
Mindgard
Platform for testing the security of AI models.
LondonSeries A
04Fraud AI
Featurespace
Real-time AI fraud and financial-crime prevention, owned by Visa.
CambridgeSubsidiary
05Cybersecurity AI
Darktrace
Self-learning AI cybersecurity detecting and responding to threats autonomously.
CambridgePrivate
06AI Security
Trent AI
Security platform protecting AI agents from prompt injection, tool misuse and data exfiltration across their lifecycle.
LondonSeed
07AI Security
Maze
Deploys AI agents that investigate, triage and remediate cloud and code security vulnerabilities.
LondonSeries A
08AI Security
Gecko Security
AI security engineer that uses LLMs to find and fix complex business-logic vulnerabilities in codebases (YC F24).
LondonSeed
09Compliance AI
Arva AI
AI workforce automating financial-crime compliance across screening, KYB, KYC and transaction monitoring for banks (YC S24).
LondonSeed
10Compliance AI
Cardamon
AI compliance co-pilot helping regulated financial firms ingest regulation and launch products faster (YC W25).
LondonSeed
11Cybersecurity AI
Prevalent AI
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.
LondonGrowth
12Compliance AI
Xapien
Reads the open web, corporate records and sanctions lists, resolves the near-namesakes, and writes a fully sourced background report in minutes; customers automate around 90% of onboarding cases. $56m Series B led by Spectrum Equity, with the CEO moving to Boston as US revenue hits half the total.
LondonSeries B
13Compliance AI
HelmGuard
Agentic governance, risk and compliance: pulls risk and security evidence straight from source systems rather than document trails, and runs the checks with specialist agents. Founded by an eight-year Palantir executive; $7.3m seed co-led by Infinity Ventures and Frontline.
LondonSeed
14AI Security
NeuralTrust
Barcelona company with a London office; a control layer over the AI agents running inside large organisations, tracking what they touch and enforcing policy on it. Its $20m round was the largest cybersecurity seed raised in the EU.
LondonSeed