Company lists · Data verified August 2026

Top 25 Cybersecurity identity management companies based in the United Kingdom

Name: Cybersecurity identity management 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 1,257 companies tracked

There are 1,257 cybersecurity identity management companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 29,177 professional contacts across them, including 13,299 with verified work emails and 4,538 with mobile numbers. London is the largest hub.

This list covers cybersecurity identity management 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.

1,257Companies

29,177Contacts tracked

13,299Verified emails

4,538Mobile numbers

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The 25 largest cybersecurity identity management companies based in the United Kingdom

Ranked by team size

Top 25 of 1,257 cybersecurity identity management 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	Sailpoint	London	1,001-5,000	3,059	1,979
3	GBG PLC	Chester	1,001-5,000	1,204	725
4	Zerofox	n/a	501-1,000	894	382
5	Netwrix Corporation	London	501-1,000	799	550
6	SISA	Leicester	201-500	739	253
7	Everfox	London	1,001-5,000	635	13
8	MASS	Lincoln	201-500	633	203
9	Withsecure	London	501-1,000	614	329
10	Yubico	West Horsley	501-1,000	546	370
11	Auth0	London	501-1,000	317	112
12	Bridewell	Edinburgh	201-500	304	189
13	KOCHO	London	201-500	299	189
14	Quorum Cyber	Edinburgh	201-500	292	177
15	Venafi, A Cyberark Company	Gb	201-500	203	101
16	Intragen	London	201-500	188	128
17	Microblink	Liverpool Street	51-200	185	119
18	Ibridge, LLC	London	501-1,000	183	35
19	Risk Associates - Emea & Asia	London	51-200	169	62
20	Exclusive Networks UK	Mansfield	201-500	168	118
21	Cyberfort	Thatcham	51-200	160	88
22	LOGIQ	Bristol	201-500	142	81
23	Cybersec Consulting	London	201-500	141	76
24	Cipher سايڤر	London	201-500	135	50
25	Cyberiam	Chester	51-200	132	100

Showing 25 of 1,257 cybersecurity identity management companies based in the United Kingdom

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Cybersecurity identity management companies based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 509 HQs

4,538Contacts with mobile numbers

28Emails re-verified in last 30 days

Companies by employee count

1-10

709

11-50

390

51-200

107

201-500

501-1,000

1,001-5,000

5,001-10,000

Cybersecurity identity management companies by metro

Metro	Companies
Cybersecurity identity management companies in London	509
Cybersecurity identity management companies in Manchester	46
Cybersecurity identity management companies in Birmingham	20
Cybersecurity identity management companies in Cheltenham	17
Cybersecurity identity management companies in Cambridge	13
Cybersecurity identity management companies in Bristol	13
Cybersecurity identity management companies in Reading	12

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 “cybersecurity identity management 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; 28 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 cybersecurity identity management companies are there based in the United Kingdom?

There are 1,257 cybersecurity identity management 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 cybersecurity identity management companies?

London leads with 509 headquartered companies, followed by Manchester (46) and Birmingham (20).

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 13,299 verified decision-maker contacts tracked across these 1,257 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.