Directory · GB
Computer and Network Security in United Kingdom
A register of firms and the professionals working at them in the Computer and Network Security sector based in United Kingdom. Browse the public index, then filter or export on Kipplo.
Companies
2K on file
Darktrace
Darktrace is a global leader in AI cybersecurity, providing the essential cybersecurity platform to secure organizations today and for an ever-changing future. Darktrace AI learns from each business's unique data in real time, detecting threats and intervening against attacks with precision and speed. We are a diverse and inclusive team of over 2,400 employees, each playing a crucial role in protecting nearly organizations and communities worldwide from known, unknown, and novel cyber-threats.
1001 to 5000 staff
Mimecast
organizations. 175+ countries. 27 million people. For over 20 years, Mimecast protected the channel where work was most concentrated. The channel has changed. Today we're a unified platform that secures humans, data, and AI — because the attack surface is no longer a network. It is the workforce itself, now joined by AI agents that act with human permission and move at machine pace. Every employee. Every agent. Every file they touch. All of it protected so the work people do, and the work they do with AI, stays whole. Work Protected.
1001 to 5000 staff
Cybersmart
Stop cyber attacks dead in their tracks with CyberSmart: an all-in-one cybersecurity monitoring, optimisation, training and insurance platform proven to defend against the unexpected.#BeCyberSmart with #CompleteCyberConfidence
51 to 200 staff
Hack The Box
Hack The Box is the leading AI-powered cybersecurity readiness and upskilling platform, trusted by 1,500+ organizations worldwide, including Fortune 500 enterprises, government agencies, and MSSPs, to build cyber resilience at scale. Through AI-enhanced intelligence, gamified labs, live-fire simulations, and one of the world’s largest cybersecurity communities, Hack The Box enables teams to master offensive and defensive skills through real-world scenarios designed for the age of AI. Founded in 2017, Hack The Box has grown a global community of over 4 million members, enabling organizations to validate resilience, mitigate breach risk, and develop cyber talent. Delivering continuous learning alongside industry-recognized certifications and certificate programs aligned with major workforce frameworks such as ENISA ECSF and NIST NICE, Hack The Box demonstrates external validation through recognized accreditation and role-based qualification recognition, including its ANAB-accredited HTB Defense Operations Analyst (DOA) certificate program and HTB CPTS, accepted for FedRAMP 3PAO penetration tester personnel. For more information, visit hackthebox.com
201 to 500 staff
Netacea
Netacea exists to give every digital business the ability to govern its automated web traffic with precision and confidence. We relentlessly build the detection, verification, and governance capability our customers need; deploying where they need us, and staying ahead of what comes next. Automated traffic now sits inside every digital journey impacting conversion, fraud, and data quality. The challenge isn’t just stopping bots. It’s knowing what to trust, what to challenge, and what to block. Using server-side detection and Intent Analytics™ we protect high-value journeys without adding friction or operational overhead. Trusted by major global brands to- Prevent account takeover and credential stuffing - Stop scraping, fraud, and business logic abuse - Protect APIs, checkout, and login flows - Ensure clean data for better decision-making <0.1% false positives. Enterprise scale. Real-time control.
51 to 200 staff
Orca Security
Orca Security is the pioneer of agentless cloud security, and is trusted by hundreds of enterprises globally. We're the industry-leading Cloud Security Platform that identifies, prioritizes, and remediates security risks and compliance issues across your cloud estate spanning AWS, Azure, Google Cloud and Kubernetes.
201 to 500 staff
Protegrity
Protegrity protects the world's most sensitive data wherever it resides. Our industry-leading solutions allow businesses to finally tap into the value of their data and accelerate digital transformation timelines – without jeopardizing individuals’ fundamental right to privacy. For more than 20 years, Protegrity has delivered innovative, data-centric protection for the most sensitive data of the largest brands on the planet. We free businesses from the constraints associated with accessing and leveraging data to create better customer experiences, make intelligence-supported decisions, and fuel innovation. Data knows no boundaries and Protegrity's technology is built for data ubiquity. Protegrity is headquartered in Stamford, Connecticut.
201 to 500 staff
Tessian
Tessian was acquired by Proofpoint. View the press release: To see what’s new, visit Tessian is a leading cloud email security platform that intelligently protects organizations against advanced threats and data loss on email, while coaching people about security threats in-the-moment. Using machine learning and behavioral data science, Tessian automatically stops threats that evade legacy Secure Email Gateways, including advanced phishing attacks, business email compromise, accidental data loss and insider threats. Tessian’s intelligent approach not only strengthens email security but also builds smarter security cultures in the modern enterprise. Founded in 2013, Tessian is backed by legendary investors such as March Capital, Sequoia, Accel and Balderton, and has been recognized as one of Fast Company’s Most Innovative Companies for 2022. Request a demo here:
201 to 500 staff
Ampliphae
Ampliphae: securing your critical infrastructure and data Winners of two GLOMO awards at Mobile World Congress 2024, Ampliphae's Encryption Intelligence is the essential tool you need to understand your encryption landscape, shut down current vulnerabilities and plan for the coming quantum computer threat. Why Ampliphae? Anticipating a seismic shift in encryption driven by the looming threat from quantum computers, Ampliphae developed our Encryption Intelligence product to address current and future encryption threats, providing unparalleled insights to help secure sensitive information. The Challenge: Quantum Computers and Encryption Evolution Quantum computers pose an existential threat to conventional encryption schemes, so there is an urgent need to assess and upgrade encryption. Ampliphae specializes in guiding organizations through this critical transition. We believe that an effective response strategy begins with a comprehensive understanding of your current encryption landscape. How We Help: Encryption Intelligence and Expert Guidance at Scale Our Encryption Intelligence product reveals everywhere encryption tech is deployed, what services and data it shields, and where vulnerabilities exist today. The product allows you to understand your unique encryption landscape so that you can make correct, informed decisions as you plan for the post-quantum future. And if you need help, our expert encryption consultants can help you make sense of it all and plan an effective roadmap to ensure your operations are protected. Recognition and Validation: GSMA GLOMO Awards 2024 Ampliphae's commitment to excellence is underscored by our recent recognition at the GSMA GLOMO awards 2024, where Encryption Intelligence was named the Best Mobile Security Solution and the CTO Choice for Mobile Technology. This acknowledgment reaffirms our position as industry leaders, ready to empower you in taking control of your encryption landscape.
11 to 50 staff
Axial Systems
Axial Systems is one of the UK’s leading solution providers and systems integrators of network, security and services. Our wide-ranging and innovative technology portfolio, coupled with our technical expertise, enables us to deliver high-performance and world-class network and security solutions with accompanying managed and support services. We completely understand that for any organisation’s network, control is everything. Axial’s Customers include blue-chip financial institutions, legal firms, wired and wireless service providers, along with public sector organisations ranging from NHS trusts, education establishments, “blue-light” emergency services and regional and central government. For further information on Axial Systems’ portfolio of solutions, visit
51 to 200 staff
Beyond Encryption
Connect with customers using the most secure encrypted email, smart admin, and authentication tech on the planet. Follow for secure communications news, tips, and expert guidance.
51 to 200 staff
Blue Helix
YOUR NETWORK NEEDS - OUR SOLUTIONS Blue Helix offers a complete range of fibre and copper networking products from the world's leading manufacturers. By offering high quality products and leading brands, excellent customer service and with a strong emphasis on building long lasting relationships, Blue Helix are at the forefront of our field. Our website offers a comprehensive on-line catalogue, with quotation request facility as well as news and featured product sections to keep you up to date with developments and any new products. Blue Helix is a true value added distributor, offering twelve distinct product ranges: Branded Warranty Systems, Cabinets & Enclosures, Containment & Trunking, Copper, Fibre Optic, FTTx, Labelling, Fixings & Fasteners, Networking, Security, Test & Measurement, Tooling, Training With products available from some of the best known names in the industry including 3M, Angstrom Bond, Angstrom Lap, BOSCH Power Tools, BOSCH Security, Brady, Cannon, Channell, Corning, GE Security (IFS), Ideal, JDSU, KD Optics, Marshall Tufflex, Nexans, Pressac, Prior Scientific, Prysmian, R&M, Teldor, Tyco AMP and Tyco Raychem, to name but a few. Please visit our website at Email: sales@bluehelix.co.uk
51 to 200 staff
Digitalxraid
At DigitalXRAID, we’re more than just a managed security services provider – we’re your trusted partner in safeguarding your business from cyber threats. With over 25 years of experience, we’re proud to offer cutting-edge services in Vulnerability Management, Penetration Testing, Red Team Exercises, Information Security, Cybersecurity Maturity Assessments, Table-Top Exercises, Incident Response, EDR & MDR with a CREST Accredited, fully managed Security Operations Centre (SOC) to keep your business protected 24/7. DigitalXRAID is part of a group of UK-based cyber security, compliance, digital forensics and e-Discovery services specialists called Xypher, bringing more than a decade of experience and extensive certified expertise. Together, the group delivers the most comprehensive support across the full cyber resilience lifecycle. This powerful alliance - combining the highest quality solutions, expertise and a shared commitment to putting customers first - is focused on helping both public and private sector clients build robust, long-term cyber resilience, and face today’s risks with confidence. What sets us apart? Our relentless drive to ensure you don’t just navigate the complex world of cyber security, but conquer it. We don’t just respond to threats; we proactively protect your business so you can focus on growth without worry. Because at the end of the day, our mission is simple: Don’t Let The Bad Guys Win. Choose DigitalXRAID for peace of mind, a team that genuinely cares about your security, and expertise that’s always at the forefront. Let’s stay two steps ahead together. Phone us on 0800 090 3734 or email info@digitalxraid.com.
51 to 200 staff
Eset Uk
We help businesses and individuals stay protected in an increasingly complex digital world. Founded in 1992, ESET is a global cybersecurity provider trusted by over 110 million users across 200 countries. From small businesses to large enterprises, we deliver security solutions that are powerful, reliable, and easy to use. Our technology is built to proactively detect and prevent evolving cyber threats, helping organisations operate with confidence and resilience.
51 to 200 staff
Intercede
Intercede® is a cybersecurity company specialising in identity, credential management and secure mobility to enable digital trust. It provides software and services that help organisations ensure the safety and security of their people, facilities, networks and information in an increasingly mobile, digital world. Intercede has been delivering solutions to high profile customers, from the US and UK governments to some of the world’s largest corporations, telecommunications providers and information technology firms, for over 20 years. Intercede’s MyID software is an identity and credential management system that enables organisations to create and assign trusted digital identities to employees, citizens and machines and in turn allows secure access to services, facilities, information and networks. MyID adheres to international standards, while remaining simple enough to be deployed onto consumer devices such as smartphones, tablets and other devices in the Internet of Things.
51 to 200 staff
Kynd
KYND is a pioneering cyber risk analytics platform that transforms complex data into clear, actionable insight. Built for the insurance market, it supports confident decision-making across underwriting and portfolio management, with particular strength in small and medium-sized enterprise risk.
51 to 200 staff
Onsecurity
OnSecurity offers CREST-accredited AI Augmented Penetration Testing, all whilst harnessing technology to simplify the management and delivery of pentesting. OnSecurity.io/
51 to 200 staff
Performanta
Performanta is a global cybersecurity and data risk management company dedicated to protecting people where data matters most. We help organisations reduce cyber risk through a comprehensive portfolio of advisory, assurance, and 24x7 managed detection and response services. At the core of our approach is SafeXDR™, a data-centric security model that prioritises threats based on business impact, enabling faster detection, reduced alert fatigue, and measurable risk reduction. With a global footprint and a multi-regional Security Operations Centre (SOC) model, we provide continuous, follow-the-sun protection tailored to modern hybrid environments. Our technology-agnostic approach ensures seamless integration with leading platforms, while aligning security operations to business priorities. Trusted by organisations across industries including financial services, healthcare, manufacturing, and critical infrastructure, Performanta acts as an extension of your team, delivering outcome-driven security, operational resilience, and data-centric protection in an evolving threat landscape.
51 to 200 staff
Pqshield
Our team is shaping the way our digital world is protected against the threats of tomorrow. In a time when quantum computers will soon be able to break current cryptography methods, we're focused on empowering organizations, industries, and nations, with the ultimate quantum-resistant cryptography solutions. PQShield was selected as a World Economic Forum Tech Pioneer in 2021, a FAST COMPANY winner 2022, WIRED Trailblazer 2023 and Bloomberg’s Startups to Watch 2023. Our expertise, clarity and care enable us to deliver new global standards alongside real-world, post-quantum hardware and software upgrades - modernizing the vital security systems and components of the world's technology supply chain. Have you subscribed to our Podcast yet- Shielded, the last line of cyber defense. Find us on all platforms: Listen Now: YouTube: Spotify Podcasts: https://open.spotify.com/show/3z88i6u9zC6NSKQWXeQ7iv Apple Podcasts:
51 to 200 staff
Proofpoint Security Awareness Training
Proofpoint Security Awareness Training was acquired by Proofpoint. To see what’s new, visit At Wombat Security, our mission is to deliver software-based cyber security awareness and training solutions that help your employees understand the risks associated with poor cyber hygiene and subsequently change their behaviors to strengthen your organization’s security posture. Our Continuous Training Methodology takes a 360-degree approach to security education, and customers who have implemented our programs have reduced successful phishing attacks and malware infections by up to 90%. Independent research by the Aberdeen Group has proven that our four-step methodology can reduce employee-related security risks and business impact by up to 50%. In March 2018, Wombat was acquired by Proofpoint, Inc, a leading cybersecurity company. With several million users across North America, Europe and Asia, we have established ourselves as a global leader in security awareness and training. Our integrated Security Education Platform allows you to streamline the implementation of your awareness and training efforts: • Assess: Create a variety of custom knowledge assessments and/or simulated phishing, smishing, and USB attacks for an end-user security diagnosis. • Educate: Maximize learning and retention with a broad set of interactive training modules. • Reinforce: Keep best practices top-of-mind for your employees by sharing articles, posters, images, and incentives in the workplace. • Measure: Change behavior — measurably. Let data and analysis drive your security awareness and training strategy.
51 to 200 staff
Razorsecure
RazorSecure offers products and services to enhance railway cyber security by protecting networks and monitoring key systems. We deliver this through our flexible approach to cyber security, designed specifically for rolling stock, signalling and infrastructure systems. We’ve learned from working with industry leading companies that everyone has a unique set of requirements and challenges to overcome, so we have tailored our solution to provide the flexibility to address even the most difficult environments.
11 to 50 staff
Surecloud
Keep your business assured with SureCloud. Everything you need today and tomorrow, in our intelligent GRC platform that everyone can use. SureCloud is the most intelligent GRC platform, developed using the only event-driven architecture in the industry. Our built-in intelligence puts risk, compliance, and audit on autopilot - helping leading organisations effortlessly manage complex risks, controls, and assessments. From compliance and data privacy to risk and audit, SureCloud delivers visibility, context, and confidence across your business. Whether you’re growing fast or operating at enterprise scale, our platform adapts to your needs and grows with you.
51 to 200 staff
Tmb Systems Limited
At TMB we specialise in delivering co-managed technology and security solutions tailored for the hospitality sector. Our team delivers secure, seamless and scalable services that protect operations and empower innovation.
51 to 200 staff
Torrid Networks Limited
Founded in 2006, Torrid Networks has been able to establish strong credentials in the area of cyber security products, research, consulting, managed services, education and staff augmentation to be recognized as a leading player in the domain. Company is trusted by over 700+ global brands from various business verticals including BFSI, defense and security establishments, critical government departments, large PSUs and many fortune companies. As part of its mission to spread information security awareness across the industry, Torrid Networks is an active participant at OWASP (Open Web Application Security Project) events. Torrid Networks is registered with global CERTs as an authorized security auditor. Since its inception, company has grown organically, hiring best industry talent to provide out-of-the-box information security services leveraging its end-to-end information security management portfolio. Company's consulting and auditing division was later merged into Network Intelligence, while its cyber security product development business was spun off as Phantom Cyber Defense.
51 to 200 staff
