Company lists · Data verified August 2026

Top 25 AI security companies based in the United Kingdom

Name: AI security companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 306 companies tracked

There are 306 AI security companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 14,745 professional contacts across them, including 6,849 with verified work emails and 2,480 with mobile numbers. London is the largest hub.

This list covers AI security companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

306Companies

14,745Contacts tracked

6,849Verified emails

2,480Mobile numbers

Unlock all 306 companies Free account · no credit card · 2 minutes

The 25 largest AI security companies based in the United Kingdom

Ranked by team size

Top 25 of 306 AI security companies based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Sophos	Abingdon	5,001-10,000	4,963	2,711
2	Darktrace	Cambridge	1,001-5,000	2,590	1,791
3	SISA	Leicester	201-500	739	253
4	Claroty	London	501-1,000	729	152
5	ROKE	Manchester	1,001-5,000	684	410
6	Everfox	London	1,001-5,000	635	13
7	Quorum Cyber	Edinburgh	201-500	292	177
8	QODEA	London	201-500	237	35
9	Rhombus	London	51-200	199	137
10	Gorilla Technology Group	London	51-200	188	75
11	Prevalent AI	London	51-200	175	101
12	Texecom LTD	Haslingden	201-500	173	73
13	Foresite Cybersecurity	Farnborough	51-200	100	67
14	Coram AI	London	51-200	100	50
15	Marss Group	London	51-200	96	59
16	Hunters	Moorgate	51-200	96	9
17	H&m Security Services Limited	Woodford Green	51-200	79	8
18	OSL Technology	Padworth Common Reading	51-200	77	44
19	Canopy	London	51-200	73	49
20	Telesoft	Blandford	51-200	68	19
21	Eset UK	Bournemouth	51-200	66	41
22	Aecor Digital	London	51-200	64	34
23	Watchtowr	London	51-200	59	22
24	Attivo Networks , A Sentinelone Company	Cambridge	1,001-5,000	57	21
25	Intelexvision	London	51-200	55	31

Showing 25 of 306 AI security companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 6,849 reachable decision-makers.

Free account · no credit card

See all 306 companies

AI security companies based in the United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 125 HQs

2,480Contacts with mobile numbers

43Emails re-verified in last 30 days

Companies by employee count

1-10

140

11-50

108

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

AI security companies by metro

Metro	Companies
AI security companies in London	125
AI security companies in Manchester	9
AI security companies in Oxford	5
AI security companies in Glasgow	4
AI security companies in Birmingham	4
AI security companies in Edinburgh	4
AI security companies in Leicester	4

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “AI security companies”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 43 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many AI security companies are there based in the United Kingdom?

There are 306 AI security companies headquartered in the United Kingdom as of August 2026 (RevenueBase).

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 AI security companies?

London leads with 125 headquartered companies, followed by Manchester (9) and Oxford (5).

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 6,849 verified decision-maker contacts tracked across these 306 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 306 AI security companies based in the United Kingdom. Start with a free account, no credit card.

Get the full list

Related lists

AI security companies by geography

Browse the directory

Browse: Companies home · All United Kingdom lists · All AI security companies lists · New lists

About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.