Top 50 Cybersecurity Companies in UK 2025

2. NCC Group

NCC Group is a global cybersecurity expert, helping organizations protect their data and systems from cyber threats. They offer services like penetration testing, risk management, and incident response. With a strong focus on innovation, NCC Group works across industries to make sure businesses stay secure. Their team of experts provides tailored solutions to address vulnerabilities and enhance resilience, making them a trusted partner for companies aiming to protect their operations.

3. Darktrace

Darktrace is a leader in AI-driven cybersecurity and uses advanced machine learning to detect and respond to threats in real-time. Their self-learning technology adapts to an organization’s unique environment to identify unusual behaviour before it escalates. Darktrace’s solutions are widely used across industries as they offer protection against ransomware, phishing, and insider threats. With a strong presence in the UK, they continue to innovate, helping businesses stay ahead of increasingly sophisticated cyberattacks.

4. BAE Systems Applied Intelligence

BAE Systems Applied Intelligence specializes in cybersecurity and intelligence solutions for governments and enterprises. They focus on protecting critical infrastructure and sensitive data from cyber threats. Their services include threat detection, digital forensics, and cyber defence. With decades of experience, BAE Systems combines cutting-edge technology with deep expertise to help clients navigate complex security challenges by offering protection against evolving threats.

5. F-Secure

F-Secure is a trusted name in cybersecurity, offering solutions like endpoint protection, threat detection, and incident response. They help businesses and individuals stay safe online by providing tools to defend against malware, ransomware, and other cyber threats. F-Secure’s proactive approach and user-friendly solutions make them a popular choice for organizations looking to strengthen their security posture in an increasingly connected world.

6. Kaspersky

Kaspersky is a global cybersecurity company known for its antivirus and endpoint security solutions. They provide advanced protection against malware, phishing, and other cyber threats. Kaspersky’s products are used by businesses and individuals worldwide to offer real-time threat intelligence and robust security features. Despite controversies, they remain a key player in the cybersecurity industry, continuously innovating to address emerging risks.

7. BT Security

BT Security is the cybersecurity division of BT Group and offer a range of services to protect businesses from cyber threats. They provide managed security services, threat intelligence, and network security solutions. With a focus on safeguarding critical infrastructure, BT Security helps organizations detect, prevent, and respond to cyberattacks for business continuity and data protection.

8. Trustwave

Trustwave is a global leader in managed security services that help businesses protect their data and comply with regulations. They offer solutions like threat detection, vulnerability management, and incident response. Trustwave’s expertise spans industries that provide tailored security strategies to mitigate risks and enhance resilience. Their proactive approach makes them a reliable partner for organizations navigating complex cybersecurity challenges.

9. CrowdStrike

CrowdStrike is a pioneer in cloud-delivered endpoint protection, using AI to stop breaches in real time. Their Falcon platform provides complete threat detection, response, and hunting capabilities. CrowdStrike’s innovative approach has made them a favorite among enterprises seeking to protect their digital assets from advanced cyber threats. With a strong UK presence, they continue to lead the way in next-generation cybersecurity.

10. Tenable

Tenable specializes in vulnerability management, helping organizations identify and address security weaknesses before they can be exploited. Their solutions provide visibility into IT environments, enabling businesses to prioritize and remediate risks effectively. Tenable’s tools are widely used across industries, offer insights that strengthen overall security posture and reduce the likelihood of successful cyberattacks.

11. KnowBe4

KnowBe4 is a leader in security awareness training, helping organizations combat phishing and social engineering attacks. Their platform educates employees on recognizing and avoiding cyber threats so that they can reduce the risk of human error. KnowBe4’s engaging training programs and simulated phishing tests empower businesses to build a culture of security, making them a key player in the fight against cybercrime.

12. Check Point

Check Point is a global cybersecurity provider offering solutions like network security, endpoint protection, and cloud security. Their technologies help businesses defend against malware, ransomware, and advanced threats. With a focus on innovation, Check Point provides complete security solutions that adapt to the changing cybersecurity scenario to offer complete protection for organizations of all sizes.

13. Proofpoint

Proofpoint specializes in email security, data protection, and threat response. Their solutions help organizations defend against phishing, malware, and insider threats. Proofpoint’s advanced analytics and threat intelligence enable businesses to detect and mitigate risks effectively. With a strong focus on human-centric security, they help organizations protect their most valuable assets, i.e. people and data.

14. ReversingLabs

ReversingLabs focuses on threat hunting and malware analysis, providing tools to detect and analyze malicious software. Their solutions help organizations uncover hidden threats in files and software, ensuring complete security. ReversingLabs’ expertise in reverse engineering and threat intelligence makes them a valuable partner for businesses seeking to stay protected from sophisticated cyberattacks.

15. Cyserch

Cyserch is a cybersecurity consultancy offering services like penetration testing, risk assessments, and incident response. They work with businesses to identify vulnerabilities and implement effective security measures. Cyserch’s hands-on approach and tailored solutions help organizations strengthen their defenses and respond to cyber threats with confidence.

16. FourNet

FourNet is one of the leading Cybersecurity Companies in UK, providing secure cloud, communication, and cybersecurity solutions. They help businesses protect their data and systems with managed security services, threat monitoring, and compliance support. FourNet’s focus on innovation and customer-centric solutions makes them a trusted partner for organizations looking to enhance their cybersecurity capabilities.

17. Cado Security

Cado Security specializes in cloud-native digital forensics and incident response solutions. Their platform helps organizations investigate security incidents faster by automatically collecting and analyzing cloud and on-premises data. With a focus on simplifying complex forensic processes, Cado Security empowers businesses to make informed decisions during cyber events and mitigate risks efficiently.

18. Wiz

Wiz offers comprehensive cloud security solutions designed to help businesses identify and resolve vulnerabilities across cloud environments. Their platform provides visibility, threat detection, and actionable insights for both public and private clouds. Wiz’s user-friendly interface makes it easier for companies to manage cloud security risks and ensure compliance with industry standards.

19. Sophos

Sophos is a leading cybersecurity company known for its advanced endpoint and network security solutions. They provide businesses with anti-virus, firewall, and threat intelligence services to combat evolving cyber threats. With a strong focus on simplicity and effectiveness, Sophos serves organizations of all sizes, helping them maintain robust cybersecurity defenses.

20. Penten

Penten focuses on secure innovation for defense and government sectors. They specialize in secure mobility, applied artificial intelligence for cybersecurity, and threat prevention solutions. Penten’s services help critical industries protect sensitive data and maintain secure communications in a rapidly changing threat landscape.

21. Digital Shadows ( Official partner of Cyberseer)

Digital Shadows helps organizations protect their digital footprint by providing threat intelligence and monitoring services. Their platform scans the open, deep, and dark web to identify risks such as data leaks, brand impersonation, and cyber threats. This proactive approach allows businesses to address security concerns before they escalate.

22. Glasswall Solutions

Glasswall Solutions offers innovative file protection technology that safeguards organizations from file-based threats. Their technology sanitizes files by rebuilding them to a secure standard, ensuring that only safe content enters an organization’s systems. Glasswall’s solutions are trusted across sectors for secure document handling and data protection.

23. Becrypt

Becrypt provides secure endpoint management and data protection solutions for government, defense, and enterprise clients. Their products help organizations maintain secure networks and protect sensitive information. Becrypt is known for its focus on secure operating systems and encryption technologies, ensuring comprehensive cybersecurity for critical sectors.

24. Titania

Titania specializes in security auditing and compliance software for network devices. Their flagship product, Nipper, automates security assessments, helping organizations identify vulnerabilities and ensure compliance with industry standards. Titania’s solutions are trusted by government agencies and enterprises to maintain secure and compliant IT infrastructures.

25. CyberArk

CyberArk is a leader in privileged access management, helping businesses secure sensitive accounts and credentials. Their solutions protect critical systems from insider threats and cyberattacks by managing and monitoring privileged user activities. CyberArk is widely recognized for its role in preventing unauthorized access to critical infrastructure.

26. Egress

Egress provides secure email and data protection services for organizations that handle sensitive information. Their solutions include email encryption, secure file sharing, and threat detection. Egress is known for its user-friendly approach to data security, ensuring that employees can protect information without compromising productivity.

27. Immersive Labs

Immersive Labs offers cybersecurity training and skills development through an interactive platform. They provide organizations with real-world simulations and challenges to help employees improve their cybersecurity knowledge. With a focus on hands-on learning, Immersive Labs helps businesses stay prepared for emerging cyber threats.

28. Redscan

Redscan provides managed detection and response (MDR) services to help organizations identify and respond to cyber threats. Their expert team monitors networks, analyzes security events, and provides actionable insights to mitigate risks. Redscan’s proactive approach ensures that businesses stay protected around the clock.

29. SecureWorks

SecureWorks offers comprehensive cybersecurity services, including threat detection, incident response, and risk management. Their solutions help businesses defend against cyber threats and maintain a strong security posture. SecureWorks is known for its expertise in threat intelligence and its commitment to safeguarding client data.

30. Alert Logic

Alert Logic provides managed detection and response (MDR) services, helping businesses identify and respond to cyber threats. Their platform offers continuous monitoring, threat intelligence, and expert analysis to protect organizations from evolving security risks. Alert Logic serves businesses across various industries, ensuring comprehensive security coverage.

31. Mandiant

Mandiant is a leading provider of cyber defense and incident response services. They help organizations detect, investigate, and respond to security breaches. With a reputation for expertise in threat intelligence and forensic analysis, Mandiant supports businesses in strengthening their cybersecurity defenses and minimizing attack impacts.

32. Palo Alto Networks

Palo Alto Networks delivers advanced cybersecurity solutions, including next-generation firewalls, threat intelligence, and endpoint protection. Their platform helps organizations prevent cyberattacks and maintain secure digital environments. Palo Alto Networks is known for its innovative approach to protecting businesses from evolving threats.

33. Fortinet

Fortinet provides comprehensive cybersecurity solutions, including firewalls, network security, and threat intelligence. Their products help businesses protect critical infrastructure and maintain secure operations. Fortinet is trusted by organizations worldwide for its robust security offerings and commitment to innovation.

34. Symantec

Symantec, now part of Broadcom, offers a wide range of cybersecurity solutions, including endpoint protection, email security, and threat intelligence. Their services help businesses safeguard their digital environments from cyber threats. Symantec is known for its long-standing expertise in the cybersecurity industry.

35. McAfee

McAfee is a well-known cybersecurity company offering solutions for endpoint protection, cloud security, and threat intelligence. They help businesses and individuals protect their digital assets from malware, phishing, and other cyber threats. McAfee’s user-friendly products make cybersecurity accessible to all.

36. Trend Micro

Trend Micro provides cybersecurity solutions, including endpoint protection, cloud security, and threat intelligence. Their services help businesses detect and prevent cyber threats across various environments. Trend Micro is known for its innovative approach and commitment to keeping organizations secure.

37. FireEye (rebranded as Trellix)

FireEye offers advanced cybersecurity solutions and threat intelligence services. Known for its expertise in detecting and responding to sophisticated cyber threats, FireEye helps businesses protect sensitive data and critical infrastructure. Their incident response services are trusted by global organizations to handle complex cyberattacks effectively.

38. Rapid7

Rapid7 provides cybersecurity tools and services to help businesses detect vulnerabilities, monitor threats, and respond to security incidents. Their solutions focus on vulnerability management, cloud security, and incident detection. With a user-friendly platform, Rapid7 supports organizations in maintaining a strong cybersecurity posture.

39. Qualys

Qualys offers cloud-based security and compliance solutions, including vulnerability management, threat detection, and policy compliance. Their platform provides real-time visibility into IT assets and security risks, helping organizations safeguard their infrastructure and maintain regulatory compliance.

40. Veracode

Veracode specializes in application security solutions, helping businesses identify and fix vulnerabilities in their software. Their platform offers static and dynamic testing, enabling developers to build secure applications. Veracode is trusted by organizations worldwide for its commitment to secure software development.

41. Zscaler

Zscaler provides cloud-native security solutions that protect businesses from cyber threats and ensure secure remote access. Their platform delivers web, application, and data security without the need for traditional hardware. Zscaler is a trusted choice for organizations embracing cloud-first strategies.

42. Okta

Okta is a leading provider of identity and access management solutions. Their platform enables secure authentication for employees, partners, and customers. Okta helps organizations manage user identities, enforce access policies, and protect against unauthorized access to digital resources.

43. SailPoint

SailPoint offers identity security solutions that help businesses manage and protect user identities across various systems and applications. Their platform automates identity governance, ensuring that the right people have the appropriate access while minimizing security risks.

44. OneTrust

OneTrust provides privacy, security, and data governance solutions to help businesses comply with global regulations. Their platform offers tools for consent management, data mapping, and incident response. OneTrust is trusted by organizations to protect customer data and maintain regulatory compliance.

45. Proofpoint

Proofpoint delivers advanced cybersecurity solutions to protect businesses from email fraud, phishing, and data loss. Their platform offers threat intelligence and secure email services, helping organizations safeguard sensitive information and ensure secure communication.

46. Mimecast

Mimecast provides email security and cyber resilience solutions to protect businesses from threats like phishing, malware, and ransomware. Their platform also offers data backup and recovery services, ensuring that companies can maintain secure and reliable communication systems.

47. Barracuda Networks

Barracuda Networks offers a range of cybersecurity solutions, including email protection, network security, and data backup. Their products help businesses safeguard against cyber threats and maintain secure IT environments. Barracuda is known for its easy-to-deploy and effective security solutions.

48. Forcepoint

Forcepoint provides security solutions that protect networks, data, and endpoints. Their platform focuses on user behavior analysis to detect and prevent insider threats and data breaches. Forcepoint’s adaptive security approach helps organizations stay ahead of evolving cyber risks.

49. LogRhythm

LogRhythm delivers threat detection and response solutions through its security information and event management (SIEM) platform. Their technology helps organizations monitor network activity, detect security incidents, and respond quickly to minimize risks.

50. Tenable

Tenable specializes in vulnerability management and continuous monitoring solutions. Their platform helps businesses identify and fix security gaps across IT and cloud environments. Tenable is widely recognized for its role in assisting organisations to maintain secure and compliant networks.

Why these Cybersecurity Companies in UK are Best for 2025 

When choosing the right cybersecurity vendor, understanding their specialization is key. Here’s how the companies on this list stand out:

• Innovation at Scale: Whether using AI to identify threats or establishing zero-trust networks, they are fiercely future-focused. 
• Adaptation to Emerging Threats: Each organization prioritizes staying ahead of cybercriminals in a rapidly changing cybersecurity world.
• Industry Specialization: From financial institutions to healthcare providers, these companies cater to diverse sectors with tailored solutions.

FAQs

Q. What criteria determine the top cybersecurity companies in the UK for 2025?

A. Criteria typically include innovation, customer reviews, market presence, service range, and cybersecurity expertise.

Q. Why is the UK a hub for leading cybersecurity companies?

A. The UK has a strong technology ecosystem, government support for cybersecurity, and a growing demand for digital security solutions.

Q. What services do these top cybersecurity companies offer?

A. They offer services like threat detection, penetration testing, identity management, vulnerability assessment, and cloud security solutions.

Q. Are these companies suitable for small businesses?

A. Yes, many of them provide scalable solutions tailored for small and medium-sized businesses.

Q. How do these companies handle cyber incidents?

A. Most offer incident response services, helping organizations quickly identify, contain, and resolve cyber threats.

Q. What is the importance of threat intelligence in cybersecurity?

A. Threat intelligence helps companies identify and respond to potential cyber threats proactively.

Q. How often should businesses seek cybersecurity assessments from these companies?

A. Regular assessments, at least annually or after major system changes, are recommended.

Stay Secure in 2025 and Beyond!

QualySec exemplifies how cybersecurity isn’t just about defense—it’s about building customer trust and ensuring peace of mind in an unpredictable digital age. Explore their offerings today, and discover why they’re being hailed as the future of cybersecurity in the UK. 

With cybersecurity at the forefront of every business conversation, these UK companies are proving to be indispensable allies. Whether you’re looking to strengthen your current defenses or ready to implement advanced, AI-powered solutions, partnering with the right cybersecurity provider is crucial. 

If there’s one company you should watch closely (and work with!), it’s QualySec. With their innovative solutions and proven track record, they are redefining what’s possible in digital security. 

Secure your business now. Book a meeting with QualySec’s cybersecurity experts to learn more.