Company lists · Data verified August 2026

Top 25 Cybersecurity risk consulting companies based in the United Kingdom

Name: Cybersecurity risk consulting 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 1,818 companies tracked

There are 1,818 cybersecurity risk consulting companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 26,864 professional contacts across them, including 10,896 with verified work emails and 2,876 with mobile numbers. London is the largest hub.

This list covers cybersecurity risk consulting 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.

1,818Companies

26,864Contacts tracked

10,896Verified emails

2,876Mobile numbers

Unlock all 1,818 companies Free account · no credit card · 2 minutes

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

Ranked by team size

Top 25 of 1,818 cybersecurity risk consulting 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	Control Risks	London	1,001-5,000	2,955	1,312
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	Integrity360	London	501-1,000	341	199
8	Bridewell	Edinburgh	201-500	304	189
9	Quorum Cyber	Edinburgh	201-500	292	177
10	The Redesign Group	London	201-500	201	140
11	Exclusive Networks UK	Mansfield	201-500	168	118
12	Cyberfort	Thatcham	51-200	160	88
13	LOGIQ	Bristol	201-500	142	81
14	Cybersec Consulting	London	201-500	141	76
15	Cipher سايڤر	London	201-500	135	50
16	Trpglobal	London	51-200	123	36
17	Bulletproof Cyber Security	London	51-200	118	75
18	Drawbridge	London	51-200	97	60
19	Cyberone	London	51-200	96	39
20	Titania LTD	London	51-200	89	47
21	Wavenet Cyberguard	London	201-500	86	58
22	Reliance Cyber	Waterloo	51-200	80	47
23	URM	Reading	51-200	80	38
24	TDI Tetrad Digital Integrity	Windsor	51-200	71	39
25	Stripe OLT	Manchester	51-200	68	36

Showing 25 of 1,818 cybersecurity risk consulting 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 10,896 reachable decision-makers.

Free account · no credit card

See all 1,818 companies

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

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 763 HQs

2,876Contacts with mobile numbers

22Emails re-verified in last 30 days

Companies by employee count

1-10

1,169

11-50

462

51-200

130

201-500

501-1,000

1,001-5,000

5,001-10,000

Cybersecurity risk consulting companies by metro

Metro	Companies
Cybersecurity risk consulting companies in London	763
Cybersecurity risk consulting companies in Manchester	60
Cybersecurity risk consulting companies in Cheltenham	28
Cybersecurity risk consulting companies in Birmingham	28
Cybersecurity risk consulting companies in Cambridge	24
Cybersecurity risk consulting companies in Bristol	21
Cybersecurity risk consulting companies 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 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; 22 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 companies are there based in the United Kingdom?

There are 1,818 cybersecurity risk consulting 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 risk consulting companies?

London leads with 763 headquartered companies, followed by Manchester (60) and Cheltenham (28).

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 10,896 verified decision-maker contacts tracked across these 1,818 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 1,818 cybersecurity risk consulting companies based in the United Kingdom. Start with a free account, no credit card.

Get the full list

Related lists

Cybersecurity risk consulting companies by geography

Browse the directory

Browse: Companies home · All United Kingdom lists · All Cybersecurity risk consulting 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.