Company lists · Data verified August 2026

Top 25 Cybersecurity risk consulting firms based in the United Kingdom

Name: Cybersecurity risk consulting firms 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 1,912 companies tracked

There are 1,912 cybersecurity risk consulting firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 30,447 professional contacts across them, including 10,974 with verified work emails and 3,042 with mobile numbers. London is the largest hub.

This list covers cybersecurity risk consulting firms 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.

1,912Companies

30,447Contacts tracked

10,974Verified emails

3,042Mobile numbers

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The 25 largest cybersecurity risk consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 1,912 cybersecurity risk consulting firms 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	Control Risks	London	1,001-5,000	2,955	1,312
2	NRI Group	London	10001+	2,871	36
3	Zerofox	n/a	501-1,000	894	382
4	SISA	Leicester	201-500	739	253
5	Everfox	London	1,001-5,000	635	13
6	Withsecure	London	501-1,000	614	329
7	Icts UK & Ireland	n/a	1,001-5,000	593	99
8	Immersive	Bristol	201-500	360	183
9	Integrity360	London	501-1,000	341	199
10	Bridewell	Edinburgh	201-500	304	189
11	The Redesign Group	London	201-500	201	140
12	Cyberfort	Thatcham	51-200	160	88
13	LOGIQ	Bristol	201-500	142	81
14	Cybersec Consulting	London	201-500	141	76
15	CCL Solutions Group	Stratford Upon Avon	51-200	136	68
16	Solace Global	Poole	201-500	126	43
17	Trpglobal	London	51-200	123	36
18	Bulletproof Cyber Security	London	51-200	118	75
19	Thomas Murray	London	51-200	111	77
20	Cybersrc Consultancy	London	51-200	99	39
21	Drawbridge	London	51-200	97	60
22	Cyberone	London	51-200	96	39
23	Wavenet Cyberguard	London	201-500	86	58
24	Reliance Cyber	Waterloo	51-200	80	47
25	URM	Reading	51-200	80	38

Showing 25 of 1,912 cybersecurity risk consulting firms based in the United Kingdom

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Cybersecurity risk consulting firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 805 HQs

3,042Contacts with mobile numbers

23Emails re-verified in last 30 days

Companies by employee count

1-10

1,237

11-50

482

51-200

132

201-500

501-1,000

1,001-5,000

10001+

Cybersecurity risk consulting firms by metro

Metro	Companies
Cybersecurity risk consulting firms in London	805
Cybersecurity risk consulting firms in Manchester	60
Cybersecurity risk consulting firms in Birmingham	30
Cybersecurity risk consulting firms in Cheltenham	29
Cybersecurity risk consulting firms in Cambridge	25
Cybersecurity risk consulting firms in Bristol	24
Cybersecurity risk consulting firms in Leeds	21

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 risk consulting firms”, 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; 23 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 risk consulting firms are there based in the United Kingdom?

There are 1,912 cybersecurity risk consulting firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Control Risks, headquartered in London, tops this list with the largest team on record.

Which city has the most cybersecurity risk consulting firms?

London leads with 805 headquartered companies, followed by Manchester (60) and Birmingham (30).

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 10,974 verified decision-maker contacts tracked across these 1,912 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.