Company lists · Data refreshed September 2026
Top 21 Intelligence and security services based in the United Kingdom
RevenueBase identified 1,140 intelligence and security services headquartered in the United Kingdom as of September 2026 and tracks 23,866 professional contacts across them, including 8,250 with verified work emails and 2,923 with mobile numbers. London is the largest hub.
This list covers intelligence and security services headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 21 largest intelligence and security services based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 4,963 | ||||
“Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,513 | ||||
“We are an intelligence-led security business.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 3 | 684 | ||||
“At Roke, we stand at the forefront of defence and security, delivering cutting-edge intelligence and engineering solutions that protect nations, troops, borders, and businesses.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 4 | 606 | ||||
“In a complex global landscape, leaders need accurate information and full context quickly.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 5 | 304 | ||||
“Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 6 | SibyllinePartial evidence | 287 | |||
“Sibylline is the world’s leading private consultancy for geopolitical risk, intelligence, and strategic insight, dedicated to helping leaders and organisations anticipate change…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 7 | 205 | ||||
“Pilgrims are a global security, risk management and service support company that identifies and manages risks for clients across all sectors, including oil & gas, telecoms…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 8 | 160 | ||||
“At Cyberfort we are passionate about the cyber security services we deliver for our customers which keeps their people, data, systems and technology infrastructure secure…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 9 | 136 | ||||
“CCL Solutions Group is one of Europe’s leading digital forensics, digital investigation and cyber security specialists, supporting law enforcement, government agencies, military…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 10 | 129 | ||||
“KHIPU Networks is an award winning international Cyber Security Company delivering a wide range of network, wireless and security solutions, technologies and services across…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 11 | 126 | ||||
“Solace Global Risk began in 2010 with a simple belief: when people face risk, they need partners who act quickly and stand by their word.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 12 | 123 | ||||
“We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 13 | 117 | ||||
“FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 14 | 111 | ||||
“Thomas Murray is a Global Risk Intelligence company.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 15 | 89 | ||||
“We are proud of our unique track record.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 16 | 87 | ||||
“ITC Secure is an advisory-led cyber security services company.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 17 | 86 | ||||
“CyberGuard Technologies is the security division of Wavenet.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 18 | 84 | ||||
“Amethyst Risk Management is a leading cybersecurity consultancy supplying expert services and support to the UK Government, Defence, Operators of Essential Services, and the…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 19 | 80 | ||||
“At Reliance Cyber, we believe in truly partnering with our customers.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 20 | Minimal Risk Consultancy LimitedPartial evidence | 76 | |||
“Minimal Risk Consultancy is an Independent Security Services, Specialist Consultancy and Recruitment business with current expertise in:> Security Risk Consultancy > Security…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 21 | 73 | ||||
“Saepio increase awareness, reduce risk and improve security in a continually evolving threat landscape.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
Showing 21 of 1,140 intelligence and security services based in the United Kingdom
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Intelligence and security services based in the United Kingdom at a glance
As of Sep 4, 2026Companies by employee count
Verified emails by last verification
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among intelligence and security services, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “intelligence and security services”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among intelligence and security services, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 8,250 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 4, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Intelligence and security services by metro
- Intelligence and security services in London477
- Intelligence and security services in Manchester35
Frequently asked
How many intelligence and security services are there based in the United Kingdom?
RevenueBase identified 1,140 intelligence and security services headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Sophos, headquartered in Abingdon, tops this list with the largest team on record.
Which city has the most intelligence and security services?
London leads with 477 headquartered companies, followed by Manchester (35) and Birmingham (14).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 8,250 verified decision-maker contacts tracked across these 1,140 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 4, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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