Top Cyber Security Companies in London (208)

RangeForce empowers team cyber readiness at scale. See real threats in action and sharpen the skills needed to defend your organization with interactive modules, challenges, and team-based threat exercises that reflect the real world.

F-Secure makes every digital moment more secure, for everyone. We deliver brilliantly simple, frictionless security experiences that make life easier for tens of millions of people we protect and our 200+ partners. For more than 30 years, we’ve led the cyber security industry with first after first with a pioneering spirit born out of a shared commitment to do better...

YOU DESERVE TO BE HACKED. They say you should keep your friends close, but your enemies closer — and CovertSwarm is your worst nightmare. A specialist red team of ethical hackers and penetration testers, we attack relentlessly from every angle to hit your brand where it hurts again, and again, and again. If there’s a weak spot in your app or...

ZeroFOX, The Social Media Security Company, enables organizations to identify, manage and mitigate social media based cyber threats

Mindgard is the leader in ai red teaming, helping enterprises identify, assess, and mitigate real-world security risks across AI models, agents, and applications. Founded on pioneering research in AI security, Mindgard was built on the insight that traditional application security approaches cannot protect systems that are probabilistic, adaptive, and deeply embedded into business workflows. As organizations deploy GenAI and agentic systems...

Veriff is the preferred identity verification partner for the world’s biggest and best digital companies, including pioneers in fintech, crypto, gaming and the mobility sectors. We provide advanced technology, deep insights and expertise from our foundation in digital-first Estonia and honed over decades in leading the digital identity revolution.The partner of choice for businesses who need to rapidly and effortlessly...

Heimdal is an industry-leading unified and AI-powered cybersecurity solutions provider established in Copenhagen in 2014. With an integrated approach to cybersecurity, Heimdal has dramatically boosted operational efficiency and security effectiveness for over 15k+ customers globally. Heimdal empowers CISOs, Security Teams, and IT admins to enhance their SecOps, reduce alert fatigue, and be proactive using one seamless XDR security platform. Our award-winning line-up of...

Message Matrix's novastone solution is an ultra-secure messaging platform that enables IM where privacy and compliance are not optional. Using our platform, organisations can deliver the best customer engagement with the market’s most secure mobile chat. Accelerate productivity integrating staff workflows into customers’ favourite chat channels and easily connect internal and external contacts without compromising security, privacy and your regulatory...

Envelop Risk is a global specialty cyber underwriting firm, combining decades of insurance industry expertise with sophisticated cyber and machine learning analytics tools. Envelop Risk provides pricing, risk analysis, and underwriting to insurers and reinsurers.

Claroty empowers organizations to secure cyber-physical systems across industrial (OT), healthcare (IoMT), and enterprise (IoT) environments: the Extended Internet of Things (XIoT). The company’s unified platform integrates with customers’ existing infrastructure to provide a full range of controls for visibility, risk and vulnerability management, threat detection, and secure remote access. Backed by the world’s largest investment firms and industrial automation...

We are a pure play IT security company, which allows us to focus solely on protecting your business from cyber threats. We have offices in Dublin, London and Sheffield, but are the trusted security partner of enterprise clients with critical IT assets in over 100 countries around the world. Our mission is to create a secure and certain future for...

Intruder is a proactive security monitoring platform for internet-facing systems. Cyber threats are ever-changing and require dedicated oversight. Existing services are inadequate, overly complex to configure and operate, and the jargon produced is often confusing, requiring specialist interpretation. Intruder provides a simple cloud based security solution which continually scans your digital assets, highlighting vulnerabilities and outlining remediation advice in the...

Bearer helps security and engineering teams proactively find and fix data security risks and vulnerabilities across their application environment so they can prevent data breaches before they happen.

CentraLogic is a global digital transformation company delivering secure, scalable and AI-driven technology solutions across India, UK, USA, Australia and the Gulf region. With 16+ years of experience and 200+ successful projects, the company specializes in Application Development and Maintenance, Cloud, Cybersecurity, Data Intelligence, AI for Business Transformation and digital engineering services. Through CentrAIscape, we offer an AI accelerator suite...

Secureframe is the leading, all-in-one compliance automation platform that helps companies achieve and maintain compliance with the most rigorous frameworks including CMMC, FedRAMP 20x, SOC 2, ISO 27001, and HIPAA.

Cellebrite is the leader in digital intelligence and investigative analytics, partnering with public and private organizations to transform how they manage data in investigations to accelerate justice and ensure data security.

At Uniken, we elevate digital identity and security from trust to certainty, ensuring confidence in every digital interaction. Our mission is to empower client-centric organizations worldwide to achieve zero fraud and create amazing customer experiences through our innovative security solutions. With our award-winning REL-ID security platform, we transform identity verification from a challenge into a strategic advantage. REL-ID secures the entire...

SIRP is the world's first self-driving SOC platform, built to replace human-mediated execution with governed autonomy. While others automate workflows, SIRP relocates decision authority into the system itself—transforming how SOCs scale, reason, and learn. Powered by OmniSense™, our AI-native architecture combines a security-tuned LLM, reinforcement learning, and a dynamic memory graph to drive intelligent agents that act—not assist. SIRP doesn’t...

NetMonkeys is a UK-based managed IT services and software provider with over 15 years of experience delivering reliable, forward-thinking technology solutions to businesses of all sizes. Operating from offices in Manchester and Nottingham, NetMonkeys specialises in proactive IT support, cybersecurity, AI-driven innovation, and bespoke software development. The company helps organisations streamline operations, enhance security, and embrace digital transformation through a comprehensive...

Cisco AppDynamics is on a mission to help the world's most innovative companies live up to their boldest ambitions. That's why we're delivering full-stack observability that allows you to see, understand, and optimize what happens inside and beyond your architecture. Our Business Observability platform speeds digital transformation by providing business context deep into the technology stack, aligning teams around shared...