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
1.8K on file
Twinstream
In 2019, our founders were working as engineers solving complex cross-domain problems in defence and security organisations. TwinStream was formed to consolidate their collective expertise and experience into one business, providing technical excellence and exceptional service to their clients. The business is headquartered in Cheltenham with our teams working both on-site with clients and remotely from home.
51 to 200 staff
2-Sec
At 2|SEC Consulting, we deliver an end-to-end service of cyber and information security solutions which are tailored to each client’s exact security needs. We help organisations to increase their cyber security maturity through a cost-efficient service which also enables our clients to do more with existing budgets. We believe that security measures should be implemented intelligently and effectively; with SMART objectives set. Our range of advisory and assurance solutions enable our clients to meet continuously evolving security challenges, comply with regulatory requirements and achieve their business objectives.
11 to 50 staff
Angoka
ANGOKA is an IoT security company focused on protecting M2M communications for Smart Cities and Mobility. Headquartered in Belfast, with offices in London and The Hague, ANGOKA offers solutions that protect devices’ identities. With an increase of inherently insecure networks coming online with the boom of IoT, ANGOKA’s solutions safeguard critical machine-to-machine communication integrity and data provenance, creating trusted connections, even in untrustworthy networks. ANGOKA is the only cybersecurity company to win a place on Zenzic’s CAM Scale-Up Programme, delivered in partnership with Plug and Play. ANGOKA was also the first NI start-up to be selected for NCSC’s Cyber Accelerator, who reviewed and assessed ANGOKA’s technology. ANGOKA is also an alumnus of Seraphim Space Camp, Yes!Delft and TechNation Cyber 2.0. Finally, ANGOKA has been awarded several Innovate UK R&D projects, which focus on securing quantum communications (led by BT) and two drone projects.
11 to 50 staff
Assure Technical
Assure Technical are technical security experts. Since 2011, it's been our goal to keep security simple - we cut out the jargon to deliver honest, professional and upfront technical security solutions.
11 to 50 staff
Athenian Tech
Athenian Tech Ltd. is a Digital Risk Management Company providing Artificial Intelligence, Machine learning-powered technology solutions to protect Digital Identity for businesses. Athenian Tech offers 360 protection against advanced digital and cyber threats. Athenian Tech platforms focus on protecting businesses from identity thefts, frauds, social engineering attacks, APT, Ransomware attacks, Crypto jacking emerging threat vectors from Dark, Deep, Surface Web.
11 to 50 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
Black Rainbow
Black Rainbow design & build off the shelf and bespoke software solutions for the Forensic, Investigation & Security Industries. Trusted Advisor to Corporate and Government sectors leading the way in Case Management and Orchestration. A Premier Elastic partner and ISV, we have worked with customers to provide expert consulting and implementation for Elasticsearch, Logstash, Kibana (ELK), and Beats. We are the only Partner specialising in Security & Investigations.
11 to 50 staff
Blockapt
Award-winning BlockAPT, founded in 2019, is redefining cybersecurity through its next-gen Autonomous, Self-Defending Platform - built on Cybersecurity Mesh Architecture and powered by AI-driven automation. Our BlockAPT Platform empowers organisations to detect, respond to, and neutralise threats in real time - all from a single pane of glass. Fully vendor-agnostic and modular by design, it unifies security, risk, and operational tools into one intelligent ecosystem - eliminating silos, accelerating response times, and uncovering threats before they cause damage. Built to streamlines your digital ecosystem, it reduces tool fatigue, and cuts through complexity whilst AI-powered automation slashes manual workloads and delivers real-time insights. Our customers gain faster threat containment, simplified compliance, and measurable ROI from day one. With one-hour deployment and a Pay-as-you-Grow model, businesses of all sizes can scale effortlessly across on premise, multi-cloud and hybrid environments. Result: Faster threat containment, simplified compliance, measurable ROI, and a quantum-secure foundation improving resiliency. Our latest innovation – the Automated Cloud Migration tool – enables seamless migrations across cloud and multi-cloud environments in just a few clicks - an industry first. The BlockAPT Platform has 3 core modules: Unify – Integrate all tools and data across your digital ecosystem into one unified view with automated aggregation, universal analysis, and intelligent decision-making. Control – Orchestrate, centrally manage and control everything in real-time from one platform with AI-powered automation and customisable playbooks for maximum operational efficiency. Quantum – Safeguard your data with NIST-certified quantum-secure protection for data-in-transit and data-at-rest - delivering future-proof security today. For more information please visit our website: or book a meeting with raj.meghani@blockapt.com
11 to 50 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
Cloudguard
Welcome to CloudGuard, where security is done different. UK-founded in 2020 by industry veterans Matt Lovell and Javid Khan. Our mission is clear, we want to provide SMEs with affordable, enterprise-grade security solutions. Recognising the escalating challenges faced by SMEs in securing their businesses, we started on a journey to develop an automated cybersecurity platform. Fast forward four years, CloudGuard is a leader in automating the Microsoft Sentinel security stack, providing services designed to improve and continuously update our customers’ cybersecurity posture. Our customers spans from 25 to 2,500 employees across a range of industries. We’re not just a company, we’re a community of Guardians committed to protecting your business. As we continue to expand our horizons, we’re actively seeking experienced SOC and SIEM specialists, along with talented people who share our passion for cybersecurity excellence. While we embrace a remote-first working culture, we see a future where CloudGuard thrives as a team of 75 people, with a significant presence in the vibrant city of Manchester. Join us on this exciting journey as we redefine cybersecurity for SMEs, one innovative solution at a time. Welcome to CloudGuard, where your security is done different.
11 to 50 staff
Cyber Management Alliance Limited
Founded in 2015 and headquartered in London UK, Cyber Management Alliance Ltd. is a recognised independent world leader in Cyber Incident & Crisis Management consultancy and training. The organisation is renowned globally as the creator of the flagship Cyber Incident Planning and Response course certified by the UK Government’s National Cyber Security Centre. The CIPR is the only certified course in the world that addresses strategy and planning for non-technical middle to senior management. Our global leadership in incident response, CSIRT and Security Operations and our satisfied client base puts us in a unique position to offer the best, up-to-date advice and guidance to our clients. Cyber Management Alliance has serviced over 300 enterprise clients in multiple verticals including government, banking, finance, IT, consultancies, healthcare, oil & gas and retail across 38 countries. The organisation has carved a niche by assessing, building and improving its clients’ Cyber Incident & Crisis Management capabilities through training, tabletop exercises, health checks and audits. We have enabled world-leading organisations such as FIFA, NHS, Capita, BNP Paribas, Waverton Investment Management and Unilever amongst others to assess their Incident Maturity and Breach Readiness through our unique Cyber Crisis Management Audits, Assessments, Tabletops and Workshops. British Medical Journal, Capita and Gyroscope are some of the organisations that have benefited from our VCISO and Trusted Advisory services. Here, at Cyber Management Alliance, we help you build and strengthen your organisation’s Cyber Incident Response Capability to enable it to rapidly detect and actively respond to business-impacting cyber-attacks.
11 to 50 staff
Cyberis
Cyberis are pioneers in customer-focussed information security. Since 2011, we’ve been helping businesses protect their brands, customers and reputation. Experienced across all sectors, we combine a client focus with technical expertise to create personalised security solutions for global businesses.
11 to 50 staff
Cyberwarfare Labs
CyberWarFare Labs (CWL) is a cybersecurity education company delivering practical, hands-on training through virtual cyber ranges and an advanced upskilling platform. We enable learners and organizations to build real-world security capability across sectors including banking, healthcare, critical infrastructure, and enterprise environments. Key Offerings- Cyber Range Labs: Secure, virtual environments for end-to-end practice in offensive, defensive, and cloud security- Upskilling Platform: A structured library of on-demand courses for all skill levels, accessible anytime- Infinity Platform: An AI-driven lab ecosystem featuring scenario-based challenges aligned with modern threat landscapes- Customized Training: Tailored programs for universities, corporations, and government agencies, including on-site delivery- Premium Membership: Lifetime access to courses, labs, and certification exams under a single membership. Who We Serve- Individuals: Students, beginners, and professionals seeking practical cybersecurity skills- Organizations: Corporate and government teams aiming to strengthen their cyber capability- Educational Institutions: Schools and universities integrating hands-on cybersecurity training into their curriculum. For any requirements, Mail us on: support@cyberwarfare.live
11 to 50 staff
Cysiam
CYSIAM® provides an entirely UK-based and threat-led 24/7 Managed Detection and Response (MDR) service. We are trusted as a preferred security partner to Public Sector organisations in the UK due to our fully vetted team’s background in military intelligence, law enforcement, and national security. Through our intelligence-led approach we provide organisations the freedom to operate and prosper without fear in the digital age. CYSIAM works in strategic partnership with public and private sector clients who understand, and are serious about mitigating, the risks that cyber incidents pose to their critical systems and data. Our team are at the cutting edge of technical cyber expertise, enhanced by decades of experience in central government, military intelligence, and law enforcement. We are driven by our values and our culture lives and breathes integrity, passion, and tenacity.
11 to 50 staff
Data Connect Group
Time and time again we see the majority of organisations struggle with the same cyber security areas leaving them exposed and heightening the risk of attack. To help address these pitfalls, we have designed a portfolio of cyber security methodologies and services. Consultancy Led Approach: No cyber security strategy is identical, which is why we believe in a consultancy led approach. Our experienced SOC team and security experts are an invaluable part of our service, they allow you to tap into a wider skills pool, achieve your project goals and help you access industry leading technology. Managed Services: We want all organisations to have access to the same security skills, support and advanced technology as large enterprises with the resources, experience and budget. Our managed services achieve this, while giving you confidence and visibility over your security. Industry Leading Technology: Continuously reviewing the security marketplace to give you access to market-leading products and vendors. The technology is tried and tested, meaning our SOC team can be on hand for support. All-in-One Platform: The vSOC Connect Console is our sophisticated platform providing you with one place for 360° visibility of your cyber security. Not only are all our managed services and consultancy work integrated into the console, but you can now import external resources, helping you maximise your project productivity and management. If you would like to find out more about Data Connect, please contact us on 01423 425 498 or moreinfo@dataconnect.co.uk
11 to 50 staff
Dnssense
DNSSense, positioned under Noventiq during 2024–2025, completed a 100% local-ownership restructuring in 2025 and evolved into a Turkey-based, R&D-driven DNS security company. With AI-powered DDR 2.0, we stop threats at the DNS layer and simplify operations through plug-and-play deployment and seamless SOC/SIEM integrations. Today, DNSSense forms the first line of defense for organizations across 74 countries, strengthening resilience and compliance with ZT-DNS, DNS firewall, and policy-driven protections.
51 to 200 staff
Equipment Hq Limited
Equipment HQ is a leading supplier in network equipment and specialists in buying back your used network hardware or IT kit. IT and Network infrastructure can be complex and time consuming. We aim to take that all off your hands by delivering the best and most effective network solution possible or supply the emergency spare that needs a fast turnaround. Similarly, we will offer you a very competitive price for networking you no longer need to offset against buying new kit. Our head office is in Bishops Stortford (very close by to Stansted airport) meaning we can usually offer a fast international or European service at short notice. As well as our office near London we also have an office in the West of England, meaning our UK shipments can often be same day by our in-house logistics team. We offer easy payments, flexible terms and have a large list of available stock.
1 to 10 staff
Fullproxy
FullProxy are a rapidly growing cyber security consultancy providing world class cyber security advisory and solutions to reduce cyber risk and optimise return on technology investment. We have a proven track record serving large public and private sector organisations throughout the UK, in complex data-sensitive industries such as Healthcare, Education, Financial Services and Critical Infrastructure. Accredited to the highest level by advanced cyber technology brands F5 and Fortinet, our experienced consultants ensure our customers can maximise the benefits of their investments, reduce time to value and access the independent specialist advice they need to meet their security challenges. Recently shortlisted for Cyber Security Company of the Year 2025 and named as one of Tussell's Top Tech 200 growing companies, FullProxy are based in Glasgow and serve customers throughout the UK and internationally.
11 to 50 staff
Gudens Cybersecurity
Guden Cybersecurity is currently operating in a private development phase.
1 to 10 staff
Image Analyzer
Image Analyzer is an artificial intelligence company specializing in visual threat recognition. Image Analyzer’s technology is designed to recognize specific visual threats such as adult material, extremism and graphic violence. The company provides its technology to leading platform owners and software vendors across various market sectors including email filtering, web filtering, digital forensics, content moderation, brand protection and parental controls. Image Analyzer holds a number of cross territory patents in its technology space.
11 to 50 staff
Istari
ISTARI is a global cybersecurity firm, established by Temasek in 2020, with a unique model for helping clients build cyber resilience. Our mission is to help organisations achieve lasting cyber resilience with a whole-of-company approach, by leveraging peerless talent, expertise, and innovation through an unparalleled network. Our vision is to curate the defining cyber resilience ecosystem of our time - uniting academia, enterprise, practitioners, policymakers, and innovators to outpace cyber risk and build collective resilience.
51 to 200 staff
Leftbrain
Prove trust. Pass due diligence. Scale securely — without breaking what works. Modern, fast-moving businesses hit a wall when enterprise clients, investors, or regulators ask for proof of security and governance. Traditional MSPs can’t deliver it, and building an internal security function is too slow and expensive. LeftBrain is a security transformation partner for hybrid, cloud-first teams. We combine governance, compliance, IT, and security operations into one integrated service — giving you the leadership, structure, and burst capacity you need to stay audit-ready and win bigger opportunities. We help you: • Achieve and maintain ISO 27001 / SOC 2. • Clear enterprise due diligence with confidence. • Embed security governance without dragging velocity. • Operate securely with 24/7 monitoring, modern IT, and expert-led guidance.
11 to 50 staff
Mitigo Group
Mitigo Group keeps professional services firms safe from cyberattack and operationally resilient. Our clients sleep at night knowing that cyber risk is under control. Our specialist sectors include legal, financial services, accountants, architects, technology, healthcare, and more. Our services are proportionate and affordable, and include technical vulnerability assessments, staff training, simulated phishing, policies & procedures to govern risk. We also undertake emergency incident containment, response and investigation.
51 to 200 staff
Next Dlp
Next DLP ("Next") is a leading provider of insider risk and data protection solutions. The Reveal Platform by Next uncovers risk, stops data loss, educates employees, and fulfills security, compliance, and regulatory needs. The company's leadership brings decades of cyber and technology experience from Fortra (f.k.a. HelpSystems), DigitalGuardian, Crowdstrike, Forcepoint, Mimecast, IBM, Cisco, and Veracode. Next is trusted by organizations big and small, from the Fortune 100 to fast-growing healthcare and technology companies. With a user-centric, flexible, cloud-native, ML-powered solution, the Reveal platform by Next is built for today's threat landscape. Unlike traditional DLP approaches, which require lengthy data discovery and classification efforts, Reveal customers gain value on day one through complete visibility and out-of-the-box policies. Reveal helps security teams understand human and device behavioral patterns in real time, strengthen defenses against insider risks, make static IT policy come alive, close compliance gaps, and protect against data exfiltration. Next is rapidly accelerating innovation and company growth, announcing significant enhancements to the Reveal platform over the past few months, including Scoped Investigations to protect employee privacy, ChatGPT visibility and adaptive controls, and integration with Splunk.
51 to 200 staff
