Company lists · Data verified August 2026

Top 25 Cybersecurity talent agencies based in the United Kingdom

Name: Cybersecurity talent agencies 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 1,219 companies tracked

There are 1,219 cybersecurity talent agencies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 23,316 professional contacts across them, including 9,358 with verified work emails and 2,957 with mobile numbers. London is the largest hub.

This list covers cybersecurity talent agencies 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.

1,219Companies

23,316Contacts tracked

9,358Verified emails

2,957Mobile numbers

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The 25 largest cybersecurity talent agencies based in the United Kingdom

Ranked by team size

Top 25 of 1,219 cybersecurity talent agencies 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	Darktrace	Cambridge	1,001-5,000	2,590	1,791
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	Fortray Global Service Limited	Manchester	201-500	545	49
7	Bridewell	Edinburgh	201-500	304	189
8	Quorum Cyber	Edinburgh	201-500	292	177
9	The Redesign Group	London	201-500	201	140
10	Exclusive Networks UK	Mansfield	201-500	168	118
11	Cyberfort	Thatcham	51-200	160	88
12	Cybersec Consulting	London	201-500	141	76
13	XCEDE	London	51-200	137	41
14	Cipher سايڤر	London	201-500	135	50
15	Khipu Networks	Fleet	51-200	129	94
16	Instil	Belfast	51-200	120	78
17	Friend MTS	Manchester	51-200	118	82
18	Bulletproof Cyber Security	London	51-200	118	75
19	Caretower An Integrity360 Company	London	201-500	97	12
20	Wavenet Cyberguard	London	201-500	86	58
21	Cybersmart	London	51-200	83	55
22	Reliance Cyber	Waterloo	51-200	80	47
23	Saepio Information Security	High Wycombe	51-200	73	57
24	TDI Tetrad Digital Integrity	Windsor	51-200	71	39
25	Stripe OLT	Manchester	51-200	68	36

Showing 25 of 1,219 cybersecurity talent agencies based in the United Kingdom

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Cybersecurity talent agencies based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 538 HQs

2,957Contacts with mobile numbers

17Emails re-verified in last 30 days

Companies by employee count

1-10

759

11-50

336

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Cybersecurity talent agencies by metro

Metro	Companies
Cybersecurity talent agencies in London	538
Cybersecurity talent agencies in Manchester	60
Cybersecurity talent agencies in Birmingham	25
Cybersecurity talent agencies in Cheltenham	22
Cybersecurity talent agencies in Bristol	17
Cybersecurity talent agencies in Cambridge	16
Cybersecurity talent agencies in Leeds	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 talent agencies”, 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; 17 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 talent agencies are there based in the United Kingdom?

There are 1,219 cybersecurity talent agencies 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 talent agencies?

London leads with 538 headquartered companies, followed by Manchester (60) and Birmingham (25).

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 9,358 verified decision-maker contacts tracked across these 1,219 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.