Company lists · Data verified August 2026

Top 25 Data center security software companies based in the United Kingdom

Name: Data center security software 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 620 companies tracked

There are 620 data center security software companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 20,868 professional contacts across them, including 9,288 with verified work emails and 3,363 with mobile numbers. London is the largest hub.

This list covers data center security software 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.

620Companies

20,868Contacts tracked

9,288Verified emails

3,363Mobile numbers

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The 25 largest data center security software companies based in the United Kingdom

Ranked by team size

Top 25 of 620 data center security software 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	Zerofox	n/a	501-1,000	894	382
4	Netwrix Corporation	London	501-1,000	799	550
5	SISA	Leicester	201-500	739	253
6	Claroty	London	501-1,000	729	152
7	Lodge Security	Cirencester	1,001-5,000	419	62
8	Avigilon	Milton Keynes	1,001-5,000	341	151
9	Kings Secure Technologies	London	501-1,000	326	173
10	Quorum Cyber	Edinburgh	201-500	292	177
11	Northland Controls	Letchworth Garden City	201-500	266	129
12	Openview Security Solutions Limited	Romford	201-500	200	86
13	Texecom LTD	Haslingden	201-500	173	73
14	Exclusive Networks UK	Mansfield	201-500	168	118
15	Cyberfort	Thatcham	51-200	160	88
16	Cipher سايڤر	London	201-500	135	50
17	Khipu Networks	Fleet	51-200	129	94
18	Bulletproof Cyber Security	London	51-200	118	75
19	Foresite Cybersecurity	Farnborough	51-200	100	67
20	Caretower An Integrity360 Company	London	201-500	97	12
21	Nomios Uk&i	Manchester	51-200	96	49
22	Titania LTD	London	51-200	89	47
23	Wavenet Cyberguard	London	201-500	86	58
24	TDI Tetrad Digital Integrity	Windsor	51-200	71	39
25	Telesoft	Blandford	51-200	68	19

Showing 25 of 620 data center security software companies based in the United Kingdom

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Data center security software companies based in the United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 197 HQs

3,363Contacts with mobile numbers

12Emails re-verified in last 30 days

Companies by employee count

1-10

281

11-50

217

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Data center security software companies by metro

Metro	Companies
Data center security software companies in London	197
Data center security software companies in Manchester	19
Data center security software companies in Birmingham	9
Data center security software companies in Milton Keynes	9
Data center security software companies in Leeds	7
Data center security software companies in Edinburgh	7
Data center security software companies in Oxford	6

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 “data center security software 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; 12 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 data center security software companies are there based in the United Kingdom?

There are 620 data center security software 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 data center security software companies?

London leads with 197 headquartered companies, followed by Manchester (19) and Birmingham (9).

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 9,288 verified decision-maker contacts tracked across these 620 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.