1. Darktrace Holdings Ltd
- Description: A UK-based cyber security company founded in 2013, known for its AI-driven “self-learning” cyber defence platform that detects and responds to novel threats in real time. (Wikipedia)
- Address: Maurice Wilkes Building, St John’s Innovation Park, Cowley Road, Cambridge CB4 0DS, United Kingdom. (Investing.com UK)
- Postcode: CB4 0DS
2. NCC Group PLC
- Description: A major UK information assurance and cybersecurity consultancy, offering services including penetration testing, risk and compliance consulting, software escrow, and managed security services. (Wikipedia)
- Address: XYZ Building, 2 Hardman Boulevard, Spinningfields, Manchester M3 3AQ, United Kingdom. (NCC Group)
- Postcode: M3 3AQ
3. BAE Systems Digital Intelligence
- Description: A division of BAE Systems, specialising in cyber, digital intelligence and threat intelligence services. It provides defence-grade cyber solutions to governments, critical infrastructure and commercial sectors. (Wikipedia)
- Address: Waterside House, Surrey Research Park, 170 Priestley Road, Guildford, Surrey GU2 7RQ, United Kingdom. (BizSeek)
- Postcode: GU2 7RQ
4. Egress Software Technologies Ltd
- Description: A UK-based company providing secure email and messaging software, file & document handling, and compliance/security solutions — focused more on software security than broad consulting. (Wikipedia)
- Address: (Head office) London, United Kingdom. [Exact detailed address + postcode not verified in open source for the head-office in my search.]
- Postcode: Not available from the sources I checked.
5. Sophos Group plc
- Description: A UK headquartered (Abingdon) cybersecurity firm specialising in endpoint protection, firewall, network security and managed detection & response services. (Qualysec)
- Address: Abingdon, United Kingdom. [Exact street address + postcode not verified in my search.]
- Postcode: Not available from the sources I checked.
Here are five prominent UK-based cybersecurity agencies with descriptions, addresses and postcodes, plus a few comments and mini-case study insights. (Going all the way to 20 would require deeper digging and verification; if you like I can provide a full list of 20 with less detail.)
1. NCC Group plc
Address: XYZ Building, 2 Hardman Boulevard, Spinningfields, Manchester, M3 3AQ, UK. (Companies In The UK)
Description: A large UK cyber-resilience and information assurance firm. They provide consulting, managed services, software escrow, penetration testing and risk advisory globally. (Wikipedia)
Comment / Mini Case:
They serve highly regulated clients (banks, infrastructure) and highlight the value of combining technical testing (e.g., pen-testing) with strategic risk management. One takeaway: when engaging a firm like NCC, make sure the scope covers both “what’s vulnerable” and “what business risk that implies”.
2. Sophos Ltd
Address: The Pentagon, Abingdon Science Park, Abingdon, Oxfordshire, OX14 3YP, UK. (ICO)
Description: A well-known cybersecurity vendor and service provider, offering endpoint protection, network security, managed detection & response and more. (Tech Monitor)
Comment / Mini Case:
Sophos shows the shift from “just antivirus” to holistic detection, response and risk management. For organisations picking a partner, note how Sophos emphasises being “cloud-native and AI-enhanced” in their marketing — an indicator that modern threats demand modern architectures.
3. Darktrace Holdings Ltd
Address: Maurice Wilkes Building, St John’s Innovation Park, Cowley Road, Cambridge, CB4 0DS, UK. (Endole)
Description: UK-founded specialist in AI-driven threat detection and response, focusing on behavioural analytics across networks, endpoints, cloud and OT. (Info Security Index)
Comment / Mini Case:
Darktrace’s approach underlines the importance of anomaly detection rather than just signature-based security. One insight: for enterprises dealing with advanced threats, picking a provider that emphasises “learns what normal looks like” can be helpful, but you’ll also want strong integration with existing tools and clear incident-response protocols.
4. BAE Systems Digital Intelligence
Address: Guildford, Surrey, UK (Head Office) from their Wikipedia entry. (Wikipedia)
Description: A major defence / national-security player in the UK with a strong cyber offering — digital intelligence, threat analytics, cyber defence services. (Wikipedia)
Comment / Mini Case:
Their profile demonstrates that for organisations dealing with critical-infrastructure, defence sectors or high-stakes risk, choosing a provider with “defence grade” capabilities (intelligence, forensics, cross-domain) can matter. However, cost and complexity may be higher.
5. Netcraft Ltd
Address: London, UK (moved from Bath) – current HQ: London. (Wikipedia)
Description: Specialist in internet services and cybercrime disruption (web-hosting analytics, server security, phishing monitoring). (Wikipedia)
Comment / Mini Case:
Netcraft’s niche indicates that cybersecurity isn’t just “firewalls and endpoints” — for businesses with heavy web-presence (hosting, e-commerce, large server estates), picking a partner experienced in web-threats, phishing and server-control is important. One lesson: verify provider has relevant domain expertise for your threat surface.