Company lists · Data verified August 2026

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

Name: Data center security system 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 590 companies tracked

There are 590 data center security system companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 15,501 professional contacts across them, including 4,426 with verified work emails and 874 with mobile numbers. London is the largest hub.

This list covers data center security system 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.

590Companies

15,501Contacts tracked

4,426Verified emails

874Mobile numbers

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

Ranked by team size

Top 25 of 590 data center security system 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	CIS Security Limited	London	1,001-5,000	913	201
2	Kings Secure Technologies	London	501-1,000	326	173
3	Northland Controls	Letchworth Garden City	201-500	266	129
4	Openview Security Solutions Limited	Romford	201-500	200	86
5	Texecom LTD	Haslingden	201-500	173	73
6	Frontline Security Solutions	Chalfont St Peter	51-200	145	40
7	The Keyholding Company	London	51-200	133	2
8	ABEL	Solihull Birmingham	51-200	69	13
9	Alertsystems LTD	Trowbridge	51-200	62	38
10	Black Diamond Security	London	201-500	62	14
11	Custom Intelligent Security	Hertford	51-200	51	44
12	ACE Fire And Security	Bedford	51-200	51	32
13	Amthal Group Companies	St Albans	51-200	48	30
14	Phoenix FMS	Newcastle Upon Tyne	201-500	44	2
15	Ak9 Security And FM Solutions LTD	London	501-1,000	43	9
16	Atec Security	Bishops Stortford	51-200	40	31
17	Gratte Brothers Security Systems & Software	London	51-200	39	32
18	Universal Security Systems LTD	London	51-200	39	9
19	Clearview Communications	Chelmsford	51-200	38	17
20	Samson Security Fire & Facilities	Birmingham	51-200	32	4
21	VIS Security Solutions Limited	Belfast	51-200	30	22
22	Gbsg LTD	n/a	51-200	27	14
23	Prism DCS	Watford	51-200	26	18
24	Veritech Security	Southampton	51-200	25	13
25	Welcome Gate	London	51-200	21	8

Showing 25 of 590 data center security system companies based in the United Kingdom

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

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 79 HQs

874Contacts with mobile numbers

11Emails re-verified in last 30 days

Companies by employee count

1-10

274

11-50

211

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Data center security system companies by metro

Metro	Companies
Data center security system companies in London	79
Data center security system companies in Manchester	15
Data center security system companies in Birmingham	14
Data center security system companies in Leeds	12
Data center security system companies in Bristol	7
Data center security system companies in Glasgow	7
Data center security system companies in Reading	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 system 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; 11 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 system companies are there based in the United Kingdom?

There are 590 data center security system companies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

CIS Security Limited, headquartered in London, tops this list with the largest team on record.

Which city has the most data center security system companies?

London leads with 79 headquartered companies, followed by Manchester (15) and Birmingham (14).

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 4,426 verified decision-maker contacts tracked across these 590 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.