AI security is now a real board-level issue for UK organisations using LLMs, chatbots, Microsoft Copilot, machine learning models, automation tools, and AI-enabled workflows.

The right AI security consultant can help you understand the risks, protect sensitive data, build practical governance, and use AI safely without slowing the business down for the sake of it.

AI security is not just about buying another security tool. It covers governance, data protection, prompt injection, model misuse, third-party AI platforms, supplier risk, regulatory pressure, and whether your existing cyber security controls are still fit for purpose.

For UK organisations, the challenge is usually practical. Teams are already using AI, but the policy, technical controls, approval process, and evidence trail have not caught up. That creates risk around confidential data, customer information, intellectual property, compliance, and decision-making.

This guide compares some of the best AI security consultants and firms in the UK for 2026, including specialists in AI governance, LLM security, AI assurance, machine learning security, risk management, and safe AI adoption.

What to Look For in an AI Security Consultant

  • Understands AI governance, LLM security, machine learning risk, and practical cyber security controls
  • Can assess risks around prompt injection, data leakage, model misuse, data poisoning, and third-party AI platforms
  • Knows how AI risk connects to UK GDPR, ISO 42001, ISO 27001, Cyber Essentials, and wider compliance expectations
  • Can explain AI security in business language, not just research or vendor language
  • Has practical experience helping organisations make risk-based decisions, not just theoretical AI knowledge

How This List Was Compiled

This roundup focuses on UK-relevant providers with visible experience in AI security, AI governance, AI assurance, cyber security, machine learning security, or secure AI adoption. The aim is not to claim there is one perfect provider for every organisation. The right choice depends on your size, sector, risk profile, budget, and whether you need hands-on support, enterprise consulting, testing, governance, or ongoing assurance.

Here is our roundup of the best AI security consultants in the UK for 2026.

1. Paul Reynolds

Paul Reynolds is a UK cyber security consultant with over 25 years of experience across security architecture, governance, cloud security, supplier risk, and regulated environments. Through Black Chili, he provides practical AI security and AI assurance support for organisations adopting AI tools and platforms.

His AI security work focuses on understanding what AI is in use, what data it touches, where the exposure sits, and what controls are missing. This can include AI readiness assessment, AI governance design, supplier and platform risk review, LLM and chatbot risk, prompt injection, accidental data leakage, ISO 42001 alignment, and practical control implementation.

This is a strong fit for UK SMEs and regulated organisations that need clear, independent guidance rather than a large consultancy model. The work is designed to help leadership and technical teams understand the real risks, make better decisions, and put sensible controls in place.

View AI Security Consulting

2. Mindgard

Mindgard is a UK company focused on AI security testing and protection. Their work centres on identifying and reducing vulnerabilities in AI and machine learning systems.

They offer AI security testing and monitoring for organisations that need to understand risks specific to AI deployments, including model behaviour, adversarial attacks, and AI-specific weaknesses.

3. Faculty AI

Faculty AI is a UK AI company with experience in responsible AI, AI governance, and AI implementation. They work with government and enterprise clients on strategy, deployment, and assurance.

They may be a good fit for larger organisations that need support across AI strategy, data science, governance, implementation, and responsible AI programmes.

4. Darktrace

Darktrace is a Cambridge-based cyber security company known for using AI in threat detection and response. Their core focus is AI-powered cyber defence, but they also sit within the wider AI and security landscape.

They are more suited to organisations looking at enterprise security platforms and AI-enabled threat detection rather than a lightweight independent AI governance review.

5. Deloitte UK

Deloitte UK offers AI risk, assurance, governance, and regulatory support through its wider consulting practice. This can suit larger organisations that need enterprise-scale delivery, governance frameworks, and multi-team transformation support.

They are likely to be more relevant where AI security is part of a wider enterprise risk, audit, compliance, or digital transformation programme.

6. BAE Systems Digital Intelligence

BAE Systems Digital Intelligence works across cyber security, intelligence, defence, and high-security environments. Their AI security capabilities are most relevant to government, defence, critical national infrastructure, and larger organisations with complex security needs.

They may be a good fit where AI security requires deep technical assessment, adversarial thinking, and high-assurance environments.

7. Garrison Technology

Garrison Technology is a UK security company focused on secure access and isolation technology. They are relevant to organisations thinking seriously about secure environments, high-risk workflows, and protecting sensitive systems.

Their work is likely to fit organisations with stricter security requirements and a need to reduce exposure from risky digital interactions.

8. Adversa AI

Adversa AI focuses on AI security, adversarial machine learning, and testing of AI and ML systems. Their work is relevant where organisations need to understand how models can be attacked, manipulated, or misused.

They may be a good option for teams that need specialist AI red teaming, model testing, vulnerability assessment, or AI-specific security validation.

9. Talan UK

Talan UK is a technology consultancy with AI, data, and transformation capabilities. Their work can include AI governance, risk assessment, and secure AI implementation as part of wider technology programmes.

They are likely to suit organisations adopting AI as part of a broader digital, data, or operational transformation programme.

Need Help Reviewing Your Own AI Risk?

If your organisation is already using AI and you are not sure whether the governance, data protection, and technical controls have kept up, the best starting point is an AI Health Check.

This gives you a clear view of what AI is in use, what risk it creates, where the control gaps are, and what to fix first.

Book an AI Security Health Check