Company lists · Data verified August 2026

Top 25 Banking cybersecurity companies based in the United Kingdom

Name: Banking cybersecurity 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 175 companies tracked

There are 175 banking cybersecurity companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 9,368 professional contacts across them, including 3,908 with verified work emails and 1,604 with mobile numbers. London is the largest hub.

This list covers banking cybersecurity 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.

175Companies

9,368Contacts tracked

3,908Verified emails

1,604Mobile numbers

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The 25 largest banking cybersecurity companies based in the United Kingdom

Ranked by team size

Top 25 of 175 banking cybersecurity 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	SISA	Leicester	201-500	739	253
3	Everfox	London	1,001-5,000	635	13
4	Biocatch	London	201-500	429	316
5	Cyberfort	Thatcham	51-200	160	88
6	Bulletproof Cyber Security	London	51-200	118	75
7	Foresite Cybersecurity	Farnborough	51-200	100	67
8	TDI Tetrad Digital Integrity	Windsor	51-200	71	39
9	Eset UK	Bournemouth	51-200	66	41
10	Hexegic	London	51-200	52	30
11	Adarma Security	Edinburgh	201-500	52	23
12	Cyberis	Tewkesbury	11-50	35	19
13	defense.com	Stevenage	51-200	32	13
14	Procheckup PCU	Portsmouth	11-50	30	18
15	Encode	London	51-200	25	9
16	Pentesec	Peterborough	51-200	24	18
17	AMR Cybersecurity	Cheltenham	11-50	23	17
18	Blue Cube Security LTD	East Grinstead	11-50	23	15
19	Blackfoot Cybersecurity	Welwyn Garden City	11-50	23	13
20	Clearswift	Berkshire	201-500	19	4
21	Infosec K2k	London	51-200	17	8
22	Cyberhive	Newbury	11-50	16	11
23	B10sec	Cheltenham	11-50	16	6
24	Socguardians LTD	London	11-50	12	1
25	Disclosure Cybersecurity	London	11-50	11	7

Showing 25 of 175 banking cybersecurity companies based in the United Kingdom

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Banking cybersecurity companies based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 81 HQs

1,604Contacts with mobile numbers

22Emails 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

5,001-10,000

Banking cybersecurity companies by metro

Metro	Companies
Banking cybersecurity companies in London	81
Banking cybersecurity companies in Manchester	8
Banking cybersecurity companies in Cheltenham	4
Banking cybersecurity companies in Oxford	3
Banking cybersecurity companies in Tewkesbury	2
Banking cybersecurity companies in Sheffield	2
Banking cybersecurity companies in Birmingham	2

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 “banking cybersecurity 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 banking cybersecurity companies are there based in the United Kingdom?

There are 175 banking cybersecurity 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 banking cybersecurity companies?

London leads with 81 headquartered companies, followed by Manchester (8) and Cheltenham (4).

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 3,908 verified decision-maker contacts tracked across these 175 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.