Company lists · Data refreshed September 2026

Top 25 Intelligence services based in the United Kingdom

Name: Intelligence services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 280 companies tracked

RevenueBase identified 280 intelligence services headquartered in the United Kingdom as of September 2026 and tracks 2,674 professional contacts across them, including 407 with verified work emails. London is the largest hub.

This list covers intelligence 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

280Companies

2,674Contacts tracked

407Verified emails

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The 25 largest intelligence services based in the United Kingdom

Ranked by team size

Top 25 of 280 intelligence services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to intelligence services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Sibylline	Strong evidence	Global, United KingdomHQ checked Sep 20, 2026	201-500	289 contacts →
	Strong evidence “Sibylline is the world’s leading private consultancy for geopolitical risk, intelligence, and strategic insight, dedicated to helping leaders and organisations anticipate change…” Source: RevenueBase Database · checked Sep 20, 2026
2	FACT	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	117 contacts →
	Strong evidence “FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
3	Wallbrook, Part Of Anthesis	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	64 contacts →
	Strong evidence “We provide intelligence, advisory and investigative services to investors, companies and NGOs grappling with the world's most important issues.” Source: RevenueBase Database · checked Sep 20, 2026
4	Prevail Partners Limited	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	62 contacts →
	Indirect evidence “Prevail Partners are mission-enablers.” Source: RevenueBase Database · checked Sep 20, 2026
5	Daintta	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	60 contacts →
	Indirect evidence “We provide deep expertise with technical and business specialists to help clients secure and protect the UK.” Source: RevenueBase Database · checked Sep 20, 2026
6	Dragonfly From DOW Jones	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	n/a	50 contacts →
	Strong evidence “Dragonfly is a geopolitical and security intelligence service for the world’s leading organisations.” Source: RevenueBase Database · checked Sep 20, 2026
7	Universal Defence And Security Solutions	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	29 contacts →
	Indirect evidence “Defence and security services consultancy.” Source: RevenueBase Database · checked Sep 20, 2026
8	Horus Security Consultancy Limited	Strong evidence	Oxford, United KingdomHQ checked Sep 20, 2026	11-50	29 contacts →
	Strong evidence “Horus is a leading intelligence and security consultancy with a global, multilingual team of unrivalled experience, insight and operational expertise.” Source: RevenueBase Database · checked Sep 20, 2026
9	Kiris Group	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	22 contacts →
	Indirect evidence “Our Chartered Security Professionals seamlessly integrate discreet and effective security into lifestyles and organisations.” Source: RevenueBase Database · checked Sep 20, 2026
10	Anotherday	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	21 contacts →
	Strong evidence “AnotherDay is a new kind of defence & security consulting firm established to bring the power of effective intelligence and strategy to the challenge of safeguarding individuals…” Source: RevenueBase Database · checked Sep 20, 2026
11	Komcept Solutions Limited	Strong evidence	Ashton, United KingdomHQ checked Sep 20, 2026	11-50	20 contacts →
	Strong evidence “Komcept Solutions Ltd.(KSL) is a British company that has been providing cutting-edge security and intelligence solutions, and working with Government agencies both in the UK and…” Source: RevenueBase Database · checked Sep 20, 2026
12	Grey Dynamics	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	17 contacts →
	Strong evidence “Grey Dynamics is a private intelligence firm that offers apolitical analysis on topics such as security, geopolitics, defence and espionage.” Source: RevenueBase Database · checked Sep 20, 2026
13	The Inkerman Group	Strong evidence	Ashford, United KingdomHQ checked Sep 20, 2026	11-50	15 contacts →
	Strong evidence “The Inkerman Group is a specialist business risk, intelligence management and investigation company.” Source: RevenueBase Database · checked Sep 20, 2026
14	The Surveillance Group	Strong evidence	Worcester, United KingdomHQ checked Sep 20, 2026	51-200	14 contacts →
	Strong evidence “The UK’s leading Surveillance, Intelligence and Open Source Investigations company.” Source: RevenueBase Database · checked Sep 20, 2026
15	Keyways Security Systems Limited	Indirect evidence	Altrincham, United KingdomHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence “KEYWAYS SECURITY SYSTEMS LIMITED is a security and investigations company based in Unit 4 Lingard Court, Lingard Ln, Bredbury, Stockport SK6 2QU, United Kingdom.” Source: RevenueBase Database · checked Sep 20, 2026
16	Goldstein Market Intelligence	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	9 contacts →
	Strong evidence “Goldstein Market Intelligence® helping businesses to be successful at strategy and take informed decisions to grow the business in future.” Source: RevenueBase Database · checked Sep 20, 2026
17	Esoteric	Indirect evidence	Frimley, United KingdomHQ checked Sep 20, 2026	1-10	9 contacts →
	Indirect evidence “Esoteric is a leading provider of counter-espionage and specialist covert surveillance services.” Source: RevenueBase Database · checked Sep 20, 2026
18	Gmtl Advisory	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Strong evidence “Strategic intelligence and high end due diligence provider to global corporations and investors.” Source: RevenueBase Database · checked Sep 20, 2026
19	CNS Risk	Strong evidence	Chobham, United KingdomHQ checked Sep 20, 2026	11-50	8 contacts →
	Strong evidence “CNS Risk provides strategic intelligence to support corporates and their legal and other external advisors.” Source: RevenueBase Database · checked Sep 20, 2026
20	Insightx	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	8 contacts →
	Strong evidence “InsightX is a specialist independent intelligence, investigations and due diligence agency.” Source: RevenueBase Database · checked Sep 20, 2026
21	Intelligentsia Worldwide	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	8 contacts →
	Strong evidence “Are You Looking For Competitive/Market Intelligence or Commercial Due Diligence Expertise?” Source: RevenueBase Database · checked Sep 20, 2026
22	Investigation Limited	Strong evidence	Newark, United KingdomHQ checked Sep 20, 2026	11-50	8 contacts →
	Strong evidence “Investigation Limited is a well-established company offering Corporate Intelligence Services globally.” Source: RevenueBase Database · checked Sep 20, 2026
23	Prism Strategic Intelligence	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	7 contacts →
	Indirect evidence “Prism advises a select group of top-tier clients working in challenging markets and dealing with complex operations, disputes, and negotiations.” Source: RevenueBase Database · checked Sep 20, 2026
24	Alliance Risk Management Solutions LTD	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	7 contacts →
	Indirect evidence “ALLIANCE RISK MANAGEMENT SOLUTIONS LTD is a Security and Investigations company located in 2 Eaton Gate, London, LONDON, United Kingdom.” Source: RevenueBase Database · checked Sep 20, 2026
25	Blue Nine	Indirect evidence	Salisbury, United KingdomHQ checked Sep 20, 2026	11-50	7 contacts →
	Indirect evidence “Established in 2006, Blue Nine is a trusted security solutions provider, serving government entities, commercial organisations, and private clients.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: intelligence services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names intelligence services.
Partial evidence: Its own public description names part of intelligence services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name intelligence services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 280 intelligence services based in the United Kingdom

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Intelligence services based in the United Kingdom at a glance

As of Sep 20, 2026

15.2%Verified-email coverage

9.6Average contacts per company

1-10Median size (employees)

40.7%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

153

11-50

51-200

201-500

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 280 companies.

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 services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names intelligence services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among intelligence 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 its RevenueBase Smart Search 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, 407 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 20, 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 services by metro

Intelligence services in London114

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names intelligence services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many intelligence services are there based in the United Kingdom?

RevenueBase identified 280 intelligence 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?

Sibylline, headquartered in Global, tops this list with the largest team on record.

Which city has the most intelligence services?

London leads with 114 headquartered companies, followed by Bristol (4) and Liverpool (4).

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 407 verified decision-maker contacts tracked across these 280 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 20, 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 Smart Search, 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.