Company lists · Data verified August 2026

Top 25 AI security companies based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 125 companies tracked

There are 125 AI security companies headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 3,682 professional contacts across them, including 998 with verified work emails and 818 with mobile numbers. London is the largest hub.

This list covers AI security 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. Data current as of August 28, 2026.

125Companies

3,682Contacts tracked

998Verified emails

818Mobile numbers

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The 25 largest AI security companies based in London, United Kingdom

Ranked by team size

Top 25 of 125 AI security companies based in London, 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	Claroty	London	501-1,000	729	152
2	Everfox	London	1,001-5,000	635	13
3	QODEA	London	201-500	237	35
4	Rhombus	London	51-200	199	137
5	Gorilla Technology Group	London	51-200	188	75
6	Prevalent AI	London	51-200	175	101
7	Coram AI	London	51-200	100	50
8	Marss Group	London	51-200	96	59
9	Canopy	London	51-200	73	49
10	Aecor Digital	London	51-200	64	34
11	Watchtowr	London	51-200	59	22
12	Intelexvision	London	51-200	55	31
13	Senseon	London	51-200	52	24
14	Cybaverse	London	51-200	40	23
15	Nothreat	London	11-50	36	16
16	Rmss LTD	London	501-1,000	29	3
17	Encode	London	51-200	25	9
18	Mindgard	London	11-50	24	15
19	Athenian Tech	London	11-50	22	10
20	Blackfog	London	11-50	21	17
21	Cybersift	London	11-50	19	11
22	Huntsman Security	London	11-50	16	12
23	Vizgard	London	11-50	14	10
24	Netrascale	London	11-50	14	2
25	Praeferre	London	11-50	13	2

Showing 25 of 125 AI security companies based in London, United Kingdom

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AI security companies based in London, United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 125 HQs

818Contacts with mobile numbers

11Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

AI security companies by metro in the United Kingdom

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 London, 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; 11 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 London, United Kingdom?

There are 125 AI security companies headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Claroty, headquartered in London, 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 998 verified decision-maker contacts tracked across these 125 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.

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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.