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
Open Network Services Ltd
ONS Group offers all the business technology services you need at unbeatable prices. From Managed IT, Network and Communications Services to Marketing and Design. We guarantee that we have the one stop solution for you. Our Story Open Network Services (ONS) started in 2001 as a network infrastructure company. ONS has grown organically and added many products and services to the portfolio to meet the needs of our customers evolving requirements. Our goal is to help make sense of the confusing world of IT, changing it into language that everyone can understand, helping implement and support the solutions moving forward and be the “one stop solution provider” for everything IT related. At the heart of ONS, our values of, great customer service, helpful, friendly, knowledgeable specialists, that will always look to produce the best possible experience, has been absolutely key in our growth and customer retention. A great service doesn’t have to cost the earth, this is why we take the time to get to know your business and requirements, so that we can offer the solutions and services to help your business perform and be successful. We would like to talk to you regarding your IT needs and we will guarantee you a great customer experience and we will find the right solution for you.
51 to 200 staff
Procheckup Pcu
Imagine a world where cyber threats are simply another challenge that you're fully equipped to handle. ProCheckUp turns this scenario into a reality. Hailing from the tech-savvy shores of Portsmouth, ProCheckUp is a bastion of cybersecurity expertise. Our reputation is solidified by a remarkable 96/100 customer satisfaction rating and a suite of accreditations including CREST, CHECK, PCI DSS, and ISO 27001. We apply our deep technical knowledge to every service we offer, from penetration testing to strategic compliance checks. Our comprehensive penetration testing services cover the full spectrum of your digital estate: web applications, cloud infrastructure, containerised infrastructures, and beyond. We ensure secure communications through meticulous IVR telephony testing and stay ahead of the curve with Generative AI testing. When it comes to incident response, we're proactive and decisive, adeptly handling crises to minimise impact. For businesses navigating the complexities of PCI DSS and ISO 27001, our consultative approach doesn't just tick boxes—it fortifies defences. ProCheckUp is the chosen ally of various sectors that form the backbone of society—government agencies, leading banks, educational institutions, and national critical infrastructure. They depend on us not just for our expansive service range but for our ability to translate cybersecurity into business resilience. Enhance your cybersecurity posture and join a network of protected and prepared organisations. Partner with ProCheckUp, where your business's security is our ultimate goal. Together, let's advance your defences and ensure your operations remain unbreachable. Connect with ProCheckUp today and place your trust in a firm that equips you to face the digital challenges of tomorrow with confidence.
11 to 50 staff
Protos Networks
Protos Networks is an award-winning network and cyber security services specialist based in the North West of England. Founded by network security engineers with years of experience in the corporate, public, and defence sectors, Protos aims to bring this experience to the SMB market. The services offered by Protos Networks include network engineering, 24/7 managed detection and response, penetration testing, Cyber Essentials certification and other compliance services. Protos is a Cisco Premier Provider and Integrator, a CrowdStrike, LevelBlue, Tenable and Verkada partner, and is licenced by the National Cyber Security Centre as a Cyber Essentials Plus Certification Body. Protos Networks aim to create excitement and drive innovational change in networks and cyber security by enlightening and empowering businesses with bespoke, secure automated solutions.
11 to 50 staff
Razorthorn Security
Razorthorn is a dedicated Information Security and Cyber Intelligence consultancy celebrating over 15 years of business. With an international presence that helps its clients to take an integrated approach cyber security and managing risk. Our belief in quality and discretion drives everything, resulting in satisfied, long term clients. Razorthorn has a singular purpose: to defend your business-critical data and applications from cyber attacks and internal threats. Our Cyber Solutions team works with each business closely to understand what drives them, where they are going and what really matters. Everything we do is closely linked to key business objectives, building and developing cyber strategies unique to your company’s needs. Whether that is simply ad-hoc information security consultancy or a fully managed cyber security solution, we have the skills, knowledge and experience to deliver best in class services. Razorthorn can provide several services including: • Penetration Testing • Continuous Threat Exposure Management • Security Consultancy Services • Audit and compliance (PCI DSS, ISO27001, Cyber Essentials) • Managed Phishing Services • Security Product Advisories Razorthorn has been recognised by Gartner as one of the best information security consultancies in Europe for PCI DSS.(Source: https://gtnr.it/2Qmf6ko)
11 to 50 staff
Salus Cyber
Salus is a provider of world-class cyber security services, enabling our clients to identify and manage their cyber risks proactively and effectively. Salus is the cyber security partner choice for multiple organisations throughout the United Kingdom and Europe. Headquartered in Cheltenham, UK, Salus is striving to ensure cost-effective and elite approaches to security testing and consultancy. Holding multiple recognised certifications and qualifications in the UK, including; ISO Standards, Cyber Scheme Team Leaders and Assessors, CHECK Team Member and Leaders, and OSCP. Salus provides a breadth and depth of experience our clients find invaluable. Some of Salus’s services include: CHECK ITHC's Security Consultancy Penetration Testing Cyber Essentials Red Teaming Compliance Testing Virtual CISO Social Engineering Security Architects Accreditation Support Embedded Capability Secure Network/Environment Builds
11 to 50 staff
Satisnet, A Gamma Company
Established in 2004 (acquired by Gamma in 2023), Satisnet, a Gamma company is a pedigree-proven cyber security services and solutions specialist with a fully UK-based 24x7x365 SOC. With operations spanning Managed Security Services (MSS), point solution offerings, project/ongoing consultancy, and hands-on training, Satisnet, a Gamma company have a global reach, with a local touch. Built on the foundations of quality customer service and tailored offerings, Satisnet, a Gamma company focus on building lasting relationships with our partners and customers.
51 to 200 staff
Secarma Ltd
Secarma exists to keep the world safe. As a leading cybersecurity company, we help organisations proactively protect against cyber threats, meet compliance standards, and identify vulnerabilities. We deliver tailored services across three core areas: Advise, Certify, and Test. What We Do: Advise: Our cybersecurity consultants work with you to understand and strengthen your organisation’s security posture. From IoT compliance to proactive threat modelling and resilience planning, we deliver actionable insights to keep you ahead of emerging risks. Certify: Achieve Cyber Essentials and other certifications with confidence. Our team supports you every step of the way, ensuring compliance and enhancing your credentials. Test: Simulate real-world cyberattacks to uncover vulnerabilities with our expert penetration testing, vulnerability assessments, red teaming, and social engineering evaluations. Our Values: We approach cybersecurity with passion, integrity, and innovation. By fostering a growth mindset and embracing continuous learning, we empower businesses to thrive in a fast-changing digital landscape. 🤝 Why Choose Secarma? Professional, diligent, and dependable, we are dedicated to delivering high-quality outcomes. Whether testing your defences, achieving certification, or building a resilient security strategy, we collaborate closely with clients to safeguard critical systems and data. Based in the UK, we serve clients globally, tailoring our solutions to meet your unique needs. Ready to secure your business? Get in touch: sales@secarma.com +44 (0)161 513 0960 secarma.com/contact
11 to 50 staff
Senseon
SIEMLess Outcomes with the SenseOn Intelligence Cloud. Traditional SIEMs bury you in logs and hidden costs. SenseOn's AI-driven approach cuts through the noise - reducing risk, speeding up response, and slashing your security spend.
51 to 200 staff
Socura
With constant vigilance against cyber threats comes the calm to grow your business. Socura is a Managed Detection and Response provider bringing the clarity, control and confidence needed to minimise risk and thrive in an ever-changing landscape.
11 to 50 staff
Spamhaus Technology Ltd
Spamhaus is the trusted authority on IP and domain reputation, uniquely placed in the industry because of our strong ethics, impartiality, and quality of actionable data. This data not only protects but also provides insight across networks and email worldwide. Our datasets are used by leading global technology companies, enterprise business, internet service providers and hosting companies, among others. Our IP and domain datasets, which are currently protecting over 3 billion mailboxes globally, are easily integrated into your current infrastructure, at both the email and DNS level. This makes them a cost-effective, set and forget solution, allowing you to focus resources elsewhere. For threat hunting and incident management, our passive DNS data and enhanced datasets allow your security teams to speed up and simplify security investigations. With over 2 decades of experience, we are the industry leaders in threat intelligence data to protect and inform.
11 to 50 staff
Tekgem
Tekgem bridges the gap between Information Technology (IT) and Operational Technology (OT). Providing expert industrial cyber security services, our tried and tested consultancy & engineering helps our customers to manage their critical infrastructure safely and securely. Our specialist cyber security software platforms Unity & Shield have been built by us to complement and work alongside our consultancy and engineering services. They have been designed to continuously monitor cyber risks and protect against the latest threats to our customers critical infrastructure.
11 to 50 staff
Assa Abloy
PHILLIPS PET SUPPLIES LIMITED is a computer & network security company based out of 12 Salisbury Gardens, Newcastle upon Tyne, United Kingdom.
10001+ staff
Crest
CREST is an international not-for-profit, membership body representing the global cyber security industry. Our goal is to help create a secure digital world for all by quality assuring our members and delivering professional certifications to the cyber security industry. We accredit 500+ member companies, operating across dozens of countries, and certify thousands of professionals worldwide. We work with governments, regulators, academe, training partners, professional bodies and other stakeholders around the world. Our members undergo a rigorous quality assurance process and employ competent professionals. Organisations buying their cyber security services from our members do so with confidence. We have regional chapters covering the Americas, Asia, Australasia, EMEA as well as the United Kingdom which is our founding chapter. It is a devolved structure based on elected Regional Councils representing member companies operating in those regions. Central services are provided by CREST International.
501 to 1000 staff
Cyber Ranges
CYBER RANGES is the next-generation cyber range for the development of cyber capabilities and the validation of cyber security skills and organizational cyber resilience. While current cyber range solutions are based on the use of legacy virtualization technologies, CYBER RANGES harnesses the power of cloud technology to manage the entire lifecycle of realistic scenarios, from their creation, to their distribution and delivery to the end users to meet even the most demanding use cases of a cyber range today.
51 to 200 staff
Cylera
Cylera provides the easiest, most accurate and extensible, platform for healthcare IoT asset intelligence and security to optimize care delivery, service availability and cyber defenses across diverse connected medical device and infrastructure. The platform accurately discovers, categorizes, assesses and monitors known and unknown IoMT assets with high fidelity to deliver unparalleled asset inventory, usage telemetry, threat prioritization, analytics, and guided remediation. The SaaS solution offers rapid implementation and works with popular IT and healthcare systems to help organizations advance cyber program maturity, increase operational efficiency, mitigate cyber risk, and enable compliance audit-readiness.
11 to 50 staff
Cyro Cyber
Cyro Cyber are your cyber security Guardians. We're a specialist and highly accredited UK cyber security consultancy and managed service provider, dedicated to delivering cyber assurance, resilience and management services to operators of critical national infrastructure. As a CREST and NCSC Cyber Resilience Auditor, Cyro is able to support organisations in defining their existing operational cyber security posture, defining a strategy to remediate and improve this position, help align to key standards such as the NCSC CAF, NIST CSF, PCI DSS and ISO27001, and thereafter monitoring all log activity to detect and respond to cyber threats in real time, managing incidents should they occur and minimising the impact to organisations and their critical service delivery to the public. Our 24/7/365 monitoring, combined with expert analysis, provides a rapid, targeted response. Our CREST accredited SOC provides full visibility across networks, endpoints, and cloud environments, ensuring rapid onboarding of protective, detective and reactive technologies, real time threat detection and customer threat trending, and incident response. With complete UK sovereignty, compliance to PSN, NIST, Cyber Essentials/Plus and ISO27001, and a “no incident” service ethos, we integrate advanced automation with human expertise to deliver service quality, technical excellence and a “go further” approach, helping organisations stay ahead of evolving risks. With 30+ years of combined experience and expertise, our team of experts define bespoke solutions to complex challenges, whether that is acting as fractional inhouse resource to fill skills gaps, or delivering red teaming assessments to highlight vulnerabilities in IT or OT networks.
51 to 200 staff
Idlayr
IDlayr is re-inventing online identity for a mobile-first world, helping banks and large enterprises to improve security, reduce fraud and transform UX. IDlayr lets you use your mobile number, instead of email, to prove your identity online; because a mobile identity is more secure, easier to use, and always with you.
11 to 50 staff
Miracl The Login You Love
MIRACL provides the world’s only user-friendly, single step Multi-Factor Authentication (MFA) and Digital Signing service. Secure MFA in 2 seconds. MIRACL Trust® ID blocks 98% of all attacks* and eliminates the need for outdated security practices such as passwords, SMS Texts, push notifications and key-cards. The use of true two-factor authentication coupled with the latest Zero Knowledge Proof (ZKP) technology means no personal data is stored or transmitted and there are no "honey-pots" of data exposed to attack keeping MIRACL Trust out of scope for GDPR. MIRACL Trust® Proof allows every user to cryptographically sign any digital asset such as a transaction payment, KYC document transfer, user uploaded content, user action or binding agreement. Usability is paramount, no additional user enrolment steps are required and users authenticate & sign using a simple PIN. Without the requirement for hardware, mobiles or fiddly second steps, your users will love the simplicity and you will appreciate the reduction in support and maintenance overheads. MIRACL Trust® integrates easily into any web or mobile application through a cloud-based service, and has no dependence on client hardware of any kind. Provisioned as a PAYG service at a fraction of the cost of competing hardware solutions or SMS texts, MIRACL Trust® ID can be integrated with any OIDC compliant platform such as ForgeRock, WSO2, Okta and Auth0 just to name a few. Capable of scaling to millions of users overnight, a combination of usability, security and cost make it possible to deploy strong MFA to large B2C networks where it was previously impossible or impractical. Learn more at: * Calculated from the 2019 Verizon Data Breach Investigations Report, based on Man-in-the-Middle, Phishing and Credential Stuffing (bot) attack frequencies recorded in 2018.
11 to 50 staff
The Cybermaniacs
Rethink Human Risk. Build Digital Resilience. Cyber threats evolve daily—so should your human risk strategy. Traditional awareness training? Outdated. One-size-fits-all tools? Ineffective. The future of security demands a full-service, adaptive approach that connects people, process, and program. That’s where Cybermaniacs comes in. We go beyond check-the-box training to help organizations understand, measure, and reduce human risk—from the front lines to the boardroom. Our platform, services, and strategic advisory accelerate program maturity, drive engagement, and create lasting security cultures. Know Your People. Measure behaviors, assess vulnerabilities, and get real risk insights. Engage Smarter. Dynamic content, managed phishing, and culture-building campaigns. Operationalize Change. Align security with business goals, empower high-risk roles, and drive transformation. Human risk management isn’t just another tool—it’s a full-scale program. We help you build, run, and scale it.
11 to 50 staff
Acds
ACDS is a team of experts assembled from some of the largest public and private sector organisations in the world, committed to the idea that we can make the digital economy safer. We are investing in the science of cyber security, building tools to help organisations understand and make informed decisions on risk and automating best practice wherever possible. Our mission is to help you prevent, monitor, and protect against threats known and unknown.
11 to 50 staff
Amr Cybersecurity
AMR CyberSecurity delivers next generation cyber security services to assist organisations across a wide variety of sectors in understanding potential threats and effectively countering them. We also help forward-thinking companies achieve and maintain compliance with legal and regulatory requirements. We provide innovative and comprehensive solutions that enable clients to maintain their competitive edge by enhancing their security posture. Through our expertise, experience and commitment to excellence, we empower clients to achieve their business objectives and focus on growth, safe in the knowledge their digital infrastructure is secure. Our ultimate goal is to build a more secure and resilient digital world for all.
11 to 50 staff
Ansec Ia Ltd
ANSEC IA Limited is a Northern Ireland based consulting company established in May 2007 and dedicated to providing our customers with quality, independent, experienced professional services. We specialise in Cyber Security, ICT Strategy & Architecture, Digital Forensics, Risk Management & Compliance. We are experienced in providing services to both the Public and Private Sectors – both locally and nationally. ANSEC has extensive experience in the design, procurement and implementation of complex IT solutions and associated project and programme management (PRINCE 2, MSP) and business analysis skills. Our technical capability is demonstrated by the range of certifications and qualifications attained by our consultants. Many of our consultants are CESG Certified Professionals (CCP), Certified Information Systems Security Professionals (CISSP) and ISO 27001 Lead Auditors. In addition, they hold a number of ISEB, Microsoft and other certifications.
11 to 50 staff
Apto Solutions
We are data insight experts, helping you own, manage and rule your data. Whether for security, IT operations or production monitoring, we help make operational monitoring work for your business. Our technology consultants are with you every step of the way, from initial conversations through to delivery against your requirements. By combining our technical expertise with domain knowledge, we’ll help you manage your data to achieve your security and operational monitoring requirements. We provide comprehensive support across all areas, from strategy and roadmap planning to tool selection and deployment, delivered via our professional and managed service approaches As certified partners and consultants in several logging and monitoring tools, including being a leading Splunk Partner, we empower our clients to make the most of their data in the long term. With nearly 20 years of consistent, proven knowledge, we’re proud to have worked with some of the largest organisations in the UK, across multiple industries. Contact us today to learn more about our services and discover how Apto can help you achieve SIEM success.
11 to 50 staff
Arrowdawn Ltd
Our vision is to be the provider of choice for Cisco Solutions in the North East and Nationally in Scotland. We strive to constantly enhance our reputation through our dedication to openness and honesty in all interactions with our customers, suppliers and partners. Arrowdawn has highly experienced and extremely competent network consultants and engineers. We have experience with clients of all shapes and sizes from small business to multinational enterprises with locations around the globe. Arrowdawn is committed to providing solutions of the highest quality and primarily provides Cisco based solutions. By working closely in partnership with Cisco, Arrowdawn is able to provide market leading solutions; exactly tailored to your needs. This provides the maximum possible return on investment and the highest levels of “future proofing”. Cisco Scottish Commercial Partner of the Year 2012 Cisco Scottish Commercial Partner of the Year 2010 Cisco Scottish SMB Partner of the Year 2009 Northern Star Business Awards Double Finalist 2010future proofing
1 to 10 staff
