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
Biocatch
BioCatch prevents financial crime by recognizing patterns in human behavior. We continuously collect more than anonymized data points – keystroke and mouse activity, touch screen behavior, physical device attributes, and more – as people interact with their digital banking platforms. With these inputs, our machine-learning models reveal patterns in user behavior and provide device intelligence that, together, distinguish the criminal from the legitimate. Today, more than 30 of the world's largest 100 banks and 287 total financial institutions deploy our solutions, analyzing 16 billion user sessions per month and protecting 532 million people around the world from fraud and financial crime. Fraud is incessant, pervasive, and ever-evolving. It’s relentless. And that's why, at BioCatch, we fight to make banking safer every day.
201 to 500 staff
Blue Coat Systems Acquired By Symantec
Our LinkedIn posts are now coming from Blue Coat was acquired by Symantec in June 2016. Symantec Corporation (NASDAQ: SYMC) is the global leader in cyber security. Operating one of the world’s largest cyber intelligence networks, we see more threats, and protect more customers from the next generation of attacks. We help companies, governments and individuals secure their most important data wherever it lives.
1001 to 5000 staff
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
Duo Security
We are Duo, and we’re here to democratize security. We were born from a hacker ethos and a desire to make the Internet a secure place. Our mission is to protect the mission of our customers by making security simple for everyone. Our team is our secret weapon. We’re a diverse crew of makers and builders, skaters and coders, filmmakers and DJ’s, teachers and students brought together by a shared belief in adding value to the world. That diversity allows us to bring an empathetic approach to solve some of the most complex global business and security challenges faced today. Our roots and values were forged in the Midwest. We believe in enabling and empowering people to follow their passion, inside and outside of the office. Change is a constant we anticipate and embrace. These are some of the things that make us unique and drive our team to be the most loved company in security. Duo is now a part of Cisco.
501 to 1000 staff
Globalsign
GlobalSign is the leading provider of trusted identity and security solutions. Enabling businesses, large enterprises, cloud service providers and IoT innovators around the world to secure online communications, manage millions of verified digital identities and automate authentication and encryption. Its high-scale Public Key Infrastructure (#PKI) and identity solutions support the billions of services, devices, people and things comprising the Internet of Everything (#IoE).
501 to 1000 staff
Isc2
ISC2 is an international nonprofit membership association focused on inspiring a safe and secure cyber world. Best known for the acclaimed Certified Information Systems Security Professional (CISSP®) certification, ISC2 offers a portfolio of credentials that are part of a holistic, pragmatic approach to security. Our association of candidates, associates and members, strong, is made up of certified cyber, information, software, and infrastructure security professionals who are making a difference and helping to advance the industry.
201 to 500 staff
Obsidian Security
Protect your business-critical applications by mitigating threats and reducing risk with Obsidian, the first truly comprehensive security solution for SaaS. The company is backed by Greylock Partners, Wing, GV and Norwest Venture Partners.
51 to 200 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
Vectra Ai
Vectra AI, Inc. is the cybersecurity AI company that protects modern networks from modern attacks. When modern cyber attackers bypass existing controls, evade detection and gain access to customers’ data center, campus, remote work, identity, cloud, and IoT/OT environments, the Vectra AI Platform sees their every move, connects the dots in real-time, and stops them from becoming breaches. With 35 patents in AI security and the most vendor references in MITRE D3FEND, organizations worldwide rely on Vectra AI to see and stop attacks their other tools can’t. For more information, visit
501 to 1000 staff
Barracuda
Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business. Our AI-powered BarracudaONE platform secures email, data, applications and networks with innovative solutions, managed XDR and a centralized dashboard to maximize protection and strengthen cyber resilience. Trusted by hundreds of thousands of IT professionals and managed service providers worldwide, Barracuda delivers powerful defenses that are easy to buy, deploy and use.
1001 to 5000 staff
Breachlock, Inc
BreachLock is a global leader in Continuous Attack Surface Discovery and Penetration Testing. Continuously discover, prioritize, and mitigate exposures with evidence-backed Attack Surface Management, Penetration Testing, and Red Teaming. Elevate your defense strategy with an attacker's view that goes beyond common vulnerabilities and exposures. Each risk we uncover is backed by validated evidence. We test your entire attack surface and help you mitigate your next cyber breach before it occurs. Know your risk. Contact BreachLock today!
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
Tryhackme
TryHackMe takes the pain out of learning and teaching Cybersecurity. Our platform makes it a comfortable experience to learn by designing prebuilt courses which include virtual machines (VM) hosted in the cloud ready to be deployed. This avoids the hassle of downloading and configuring VM's. Our platform is perfect for CTFs, Workshops, Assessments or Training.
51 to 200 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
Eset Uk
Founded in 1992, ESET is a global provider of security software for enterprises and consumers, dedicated to helping the world fight against evolving digital threats. ESET Endpoint Antivirus, our flagship product, consistently achieves the highest accolades across a host of industry leading comparative tests and is the foundational product that builds out the ESET solutions line. Since testing began in 1998, our antivirus is the only solution worldwide that has never missed a single “In the Wild” virus and holds the world record for VB100 Awards. We now produce the only AV product to win over 100 VB100's. ESET is headquartered in Bratislava, Slovakia with head sales offices in San Diego, USA; Prague, Czech Republic; Buenos Aires, Argentina; Bournemouth, United Kingdom and supports a global distribution network in 200 countries servicing over 110 million users worldwide.
51 to 200 staff
Proofpoint
We secure how people, data and AI agents connect across email, cloud and collaboration tools.
1001 to 5000 staff
Quantinuum
Science led and enterprise driven, Quantinuum unites Cambridge Quantum’s best-in-class software with Honeywell Quantum Solutions’ high-performing trapped-ion hardware. We are scaling quantum computing and developing applications today to solve the world’s most pressing challenges.
201 to 500 staff
Vanguard Integrity Professionals
Established in 1986 as one of the largest independent providers of enterprise security software, we continuously drive innovation in security software and technology to stay ahead of the evolving world by delivering the cybersecurity education and training needed to improve your enterprise.
51 to 200 staff
Yubico
Yubico (Nasdaq Stockholm: YUBICO), the inventor of the YubiKey, offers the gold standard for phishing-resistant multi-factor authentication (MFA), stopping account takeovers in their tracks and making secure login easy and available for everyone. Since the company was founded in 2007, it has been a leader in setting global standards for secure access to computers, mobile devices, servers, browsers, and internet accounts. Yubico is a creator and core contributor to the FIDO2, WebAuthn, and FIDO Universal 2nd Factor (U2F) open authentication standards, and is a pioneer in delivering hardware-based passwordless authentication using the highest assurance passkeys to customers in 160+ countries. Yubico’s solutions enable passwordless logins using the most secure form of passkey technology. YubiKeys work out-of-the-box across hundreds of consumer and enterprise applications and services, delivering strong security with a fast and easy experience. As part of its mission to make the internet more secure for everyone, Yubico donates YubiKeys to organizations helping at-risk individuals through the philanthropic initiative, Secure it Forward. The company is headquartered in Stockholm and Santa Clara, CA. For more information on Yubico, visit us at
201 to 500 staff
Coro
Coro, the leading cybersecurity platform for small and mid-size businesses, empowers organizations to easily defend against malware, ransomware, phishing, data leakage, network threats, insider threats and email threats across devices, users, networks and cloud applications. Coro’s platform automatically detects and remediates the many security threats that today’s distributed businesses face, without IT teams having to worry, investigate, or fix issues themselves. Coro has been named a leader in G2-Grid for EDR/MDR, received Triple-A grading from SE LABS, and was named on Deloitte's Fast 500.
201 to 500 staff
Covertswarm
YOU DESERVE TO BE HACKED®. Successful companies are constant targets for attackers. Those who take security seriously don’t test their defenses once a year. They subscribe to CovertSwarm. Our Constant Cyber Attack Subscription delivers relentless, full-spectrum assaults across your digital, physical, and social surfaces. Forget rigid scopes and waiting weeks for a report. We give you a relentless adversary, attacking, probing, and exposing weaknesses before real attackers do. And if we can’t break in, you’ll know your security investments are working. Schedule a call with our team to discuss how we can help outpace cyber threats.
51 to 200 staff
Cultureai
CultureAI is the AI Usage Control Platform that helps organisations enable safe, compliant AI adoption. With up to 78% of employees already using tools like ChatGPT and Copilot—often without approval—CultureAI gives security teams real-time visibility into sanctioned and shadow AI use, detects risky behaviour at the prompt level, and nudges users before mistakes happen. Deployed in minutes, it closes blind spots, reduces risk, and keeps innovation moving safely at scale.
11 to 50 staff
Cyber Heals
In the ever-evolving landscape of cyber threats, Cyber Heals stands out. Combining the power of Artificial Intelligence with extensive cybersecurity expertise, we are transforming how businesses approach digital defense. Our products don't just react; they anticipate, adapt, and proactively counteract cyber threats, providing businesses with the confidence to operate securely in the digital space. In addition to our AI-driven products, our professional services team designs customized protection strategies, ensuring comprehensive security for your digital infrastructure. Cyber Heals is a global company headquartered in the United Kingdom, with branches across the Middle East, Malaysia, Australia, and India.
11 to 50 staff
Cyberclan
Since 2006, CyberClan has been delivering the peace of mind our clients need to operate with confidence online. Located across the United States, Canada and the United Kingdom, CyberClan is a global organization offering first-class Incident Response & Breach Response Services, CyberExtortion, Ransomware, eDiscovery, tailored Risk Management Consultancy Services and unparalleled Managed Security Services. Working with industry-leading companies within a variety of sectors including Local Provincial, State & Federal Governments, Foreign Embassy, Aerospace, Mining, Technology, Insurance, Education, Healthcare, Manufacturing, Retail, Professional Services, Logistics, and Charities. Our services are affordable, adaptable and scalable, meaning that we are able to supply and manage solutions for any size organization. Enterprise Security. Human Response. Follow us on Twitter @CyberClanTM Our blog: https://cyberclan.com/knowledge/ 24/7 Incident Hotline: US/CAD: 1800 762 3290 UK: 0800 368 8731
51 to 200 staff
