Company lists · Data refreshed September 2026

Top 24 Military cybersecurity companies based in London, United Kingdom

Name: Military cybersecurity companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 13, 2026 113 companies tracked

RevenueBase identified 113 military cybersecurity companies headquartered in London, United Kingdom as of September 2026 and tracks 3,282 professional contacts across them, including 632 with verified work emails and 557 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers military cybersecurity companies headquartered in London, 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 13, 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 13, 2026 86% judged on-target in blind review

113Companies

3,282Contacts tracked

632Verified emails

557Mobile numbers

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The 24 largest military cybersecurity companies based in London, United Kingdom

Ranked by team size

Top 24 of 113 military cybersecurity companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 13, 2026. RevenueBase Smart Search rates how each company's information relates to military cybersecurity companies: 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	White HAT An Epam Company	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	77 contacts →
	Indirect evidence “White Hat, part of the EPAM group, is an award-winning cyber intelligence and offensive security company that leverages an attacker’s perspective to shape innovative, proactive…” Source: RevenueBase Database · checked Sep 13, 2026
2	Wizard Group	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	61 contacts →
	Partial evidence “The Wizard group consists of 4 companies all within the information technology and cybersecurity industry.” Source: RevenueBase Database · checked Sep 13, 2026
3	Garrison NOW A Part Of Everfox	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	60 contacts →
	Partial evidence “Garrison is a London-based cybersecurity company founded in 2014 by David Garfield (CEO) and Henry Harrison (Chief Scientist).” Source: RevenueBase Database · checked Sep 13, 2026
4	Hexegic	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	52 contacts →
	Indirect evidence “At Hexegic we are not just passionate about protecting data through our Cyber services we are passionate about helping companies release the potential of the data they hold…” Source: RevenueBase Database · checked Sep 13, 2026
5	Trident Search	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	32 contacts →
	Indirect evidence “Your partner in cyber security talent, investment and events.” Source: RevenueBase Database · checked Sep 13, 2026
6	Torrid Networks Limited	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	32 contacts →
	Indirect evidence “Founded in 2006, Torrid Networks has been able to establish strong credentials in the area of cyber security products, research, consulting, managed services, education and staff…” Source: RevenueBase Database · checked Sep 13, 2026
7	Cyb3r	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	32 contacts →
	Indirect evidence “CYB3R Group, is a leading provider of comprehensive Cyber Security, IT and Communications Solutions.” Source: RevenueBase Database · checked Sep 13, 2026
8	Encode	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	25 contacts →
	Indirect evidence “Encode is now part of Obrela Security Industries collectively delivering cutting edge Cyber Security Services, empowering organizations to better protect against cyber threats.” Source: RevenueBase Database · checked Sep 13, 2026
9	CYPRO	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	21 contacts →
	Indirect evidence “Secure.” Source: RevenueBase Database · checked Sep 13, 2026
10	Templar Executives	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	21 contacts →
	Indirect evidence “Templar Executives is an award winning, international Cyber Security advisory services and solutions company operating at the highest levels across the public and private sectors.” Source: RevenueBase Database · checked Sep 13, 2026
11	th4ts3cur1ty.company	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	18 contacts →
	Indirect evidence “th4ts3cur1ty.company supplies cyber security services internationally.” Source: RevenueBase Database · checked Sep 13, 2026
12	Infosec K2k	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	18 contacts →
	Partial evidence “Infosec K2K safeguards your organisation’s most valuable assets with tailored cybersecurity solutions.” Source: RevenueBase Database · checked Sep 13, 2026
13	Sinevis	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	17 contacts →
	Partial evidence “We are a leading cybersecurity services organization with more than a decade of proven expertise in consulting, solution implementation and managed services.” Source: RevenueBase Database · checked Sep 13, 2026
14	CST Limited Computer Security Technology	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	17 contacts →
	Indirect evidence “We are a London based specialist supplier of cyber defence solution and information security services.” Source: RevenueBase Database · checked Sep 13, 2026
15	Tranchulas	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	15 contacts →
	Indirect evidence “Founded in 2006, Tranchulas is a multinational cyber security company having its offices in London, San Francisco, Budapest and Islamabad.” Source: RevenueBase Database · checked Sep 13, 2026
16	Hacker Academy	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	15 contacts →
	Partial evidence “We Help Your Company Culture to Have a Successful Cybersecurity Posture.” Source: RevenueBase Database · checked Sep 13, 2026
17	Socguardians LTD	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	13 contacts →
	Partial evidence “Our mission at SOCGuardians is to empower organizations to operate confidently in a digital world by providing cutting-edge cybersecurity services.” Source: RevenueBase Database · checked Sep 13, 2026
18	Cyber Armed Security	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	12 contacts →
	Indirect evidence “At Cyber Armed Security, we protect organisations worldwide from evolving cyber threats through intelligence-driven ethical hacking.” Source: RevenueBase Database · checked Sep 13, 2026
19	Disclosure Cybersecurity	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	11 contacts →
	Partial evidence “Disclosure Cybersecurity Ltd is a specialist cyber security company, formed by professionals with extensive experience and wide exposure in the cyber security market.” Source: RevenueBase Database · checked Sep 13, 2026
20	Gbms Tech LTD	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	9 contacts →
	Indirect evidence “GBMS Tech are leading providers of Innovative, effective, proactive cyber security products and services with advanced highly secure zero trust quantum safe solutions.” Source: RevenueBase Database · checked Sep 13, 2026
21	Coc00n Cyber	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	8 contacts →
	Indirect evidence “coc00n secures the personal devices of high-value and high-interest individuals against cyber attacks.” Source: RevenueBase Database · checked Sep 13, 2026
22	Bell ICT	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	5 contacts →
	Indirect evidence “From the little niggles to the large networks It’s the little things that are vital whether you have a website, online accounts or any type of web-based infrastructure.” Source: RevenueBase Database · checked Sep 13, 2026
23	River Oakfield	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	4 contacts →
	Indirect evidence “River Oakfield is a global cyber security firm which provides tailored solutions to individuals, business leaders and enterprise clients.” Source: RevenueBase Database · checked Sep 13, 2026
24	Ultra Horizon	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	4 contacts →
	Indirect evidence “Ultra Horizon Ltd is a cyber security company comprised of computer scientists who design bespoke security solutions for the maritime and defence sector.” Source: RevenueBase Database · checked Sep 13, 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: military cybersecurity companies. 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 military cybersecurity companies.
Partial evidence: Its own public description names part of military cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name military cybersecurity companies. 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 24 of 113 military cybersecurity companies based in London, United Kingdom

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Military cybersecurity companies based in London, United Kingdom at a glance

As of Sep 13, 2026

19.3%Verified-email coverage

17.0%Mobile-number coverage

29.0Average contacts per company

11-50Median size (employees)

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 16.0d

4880–30

13131–60

361–90

190–180

9180+

Company record updated

Median 76.0d

00–30

1,06231–60

1,62061–90

43490–180

166180+

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 military cybersecurity companies, 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 London, United Kingdom whose own description of what they do matches “military cybersecurity companies”. 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 military cybersecurity companies), 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 military cybersecurity companies, and records with no verified work email. Companies headquartered outside London 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, 632 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 13, 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.

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 military cybersecurity companies, 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 military cybersecurity companies are there based in London, United Kingdom?

RevenueBase identified 113 military cybersecurity companies headquartered in London, 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?

White HAT An Epam Company, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most military cybersecurity companies?

London leads the United Kingdom with 108 headquartered companies, followed by Manchester (13) and Birmingham (6).

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 632 verified decision-maker contacts tracked across these 113 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 13, 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.