Company lists · Data refreshed September 2026

Top 25 Alarm system companies based in the United Kingdom

Name: Alarm system companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,921 companies tracked

RevenueBase identified 1,921 company matches for alarm system companies associated with the United Kingdom as of September 2026 and tracks 20,289 professional contacts across them, including 7,281 with verified work emails. London is the largest hub.

This list covers company matches for alarm system companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built

1,921Companies

20,289Contacts tracked

7,281Verified emails

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The 25 largest alarm system companies based in the United Kingdom

Ranked by team size

Top 25 of 1,921 company matches for alarm system companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Chubb Fire & Security	Exact match	Staines, United KingdomHQ recorded Sep 19, 2026	10001+	6,169 contacts →
	Exact match “Making the world a safer place.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	Global Security	Exact match	Blackburn, United KingdomHQ recorded Sep 19, 2026	n/a	393 contacts →
	Exact match “At Global Security Ltd, we are proud to be one of the UK’s trusted suppliers of CCTV, intruder alarms, access control, and fire safety systems.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Marlowe Fire & Security	Exact match	Manchester, United KingdomHQ recorded Sep 19, 2026	501-1,000	389 contacts →
	Exact match “Mitie Fire & Security is part of Mitie, the UK’s leading facilities management and professional services company, delivering integrated fire and security solutions that protect…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Kings Secure Technologies	Exact match	Bradford, United KingdomHQ recorded Sep 19, 2026	501-1,000	326 contacts →
	Exact match “Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Churches Fire & Security	Exact match	Chandlers Ford, United KingdomHQ recorded Sep 19, 2026	201-500	324 contacts →
	Exact match “Established in 1992, Churches Fire & Security is a nationwide company dedicated to supplying customers with the best fire safety and security services.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Openview Security Solutions Limited	Exact match	Romford, United KingdomHQ recorded Sep 19, 2026	201-500	200 contacts →
	Exact match “OpenView Security Solutions is the UK’S largest privately owned independent security company and provides unique, innovative and technologically excellent solutions to meet…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Gough & Kelly	Exact match	Leeds, United KingdomHQ recorded Sep 19, 2026	51-200	157 contacts →
	Exact match “A premier provider of security products and services across England, Gough & Kelly was formed in 1988 to influence and inspire the security and electrical marketplace by providing…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Frontline Security Solutions	Exact match	Chalfont St Peter, United KingdomHQ recorded Sep 19, 2026	51-200	145 contacts →
	Exact match “Frontline Security Solutions is a global electronic security integrator specialising in Access Control, CCTV, Intruder and Intercom systems that protect people, property and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Global Fire & Security Systems	Exact match	Nottingham, United KingdomHQ recorded Sep 19, 2026	51-200	119 contacts →
	Exact match “Global Fire and Security Systems are market leaders in providing quality product solutions to services through the Fire and Security market place nationwide.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Senseco Systems Limited	Exact match	Gillingham, United KingdomHQ recorded Sep 19, 2026	201-500	107 contacts →
	Exact match “Senseco Systems Limited is the UK’s largest and highest accredited independent fire and security company, delivering integrated life safety and security solutions across complex…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Croma Security Solutions Group PLC Cssg	Exact match	Whiteley, United KingdomHQ recorded Sep 19, 2026	501-1,000	87 contacts →
	Exact match “Croma Security Solutions Group (CSSG) began in 1970 as a family-run business in Shirley, Southampton, known as County Locksmiths.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Scutum UK	Exact match	Chertsey, United KingdomHQ recorded Sep 19, 2026	201-500	87 contacts →
	Exact match “Scutum Fire & Security Ltd.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Ea-Rs	Exact match	Witham, United KingdomHQ recorded Sep 19, 2026	501-1,000	78 contacts →
	Exact match “EA-RS provides integrated fire, security, electrical and data solutions across the UK, acting as one trusted partner for all building protection needs.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Walker Fire And Security UK	Exact match	Preston, United KingdomHQ recorded Sep 19, 2026	201-500	75 contacts →
	Exact match “We simplify compliance and secure your business, with one trusted partner.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	SPY Alarms LTD	Exact match	Orpington, United KingdomHQ recorded Sep 19, 2026	201-500	71 contacts →
	Exact match “Spy Alarms is probably the largest privately owned business installing security systems in the South East, started by Martin Foster after his own house was burgled and he could…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Swift Fire & Security	Exact match	Salford Quays, United KingdomHQ recorded Sep 19, 2026	201-500	71 contacts →
	Exact match “We are now Marlowe Fire & Security Limited.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	ABEL	Exact match	Leicester, United KingdomHQ recorded Sep 19, 2026	51-200	70 contacts →
	Exact match “With over 50 years’ experience in the security industry, Abel has grown to become one of the UK’s largest privately owned providers of electronic security systems.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	City Security Services Part Of City Group Security	Exact match	London, United KingdomHQ recorded Sep 19, 2026	201-500	64 contacts →
	Exact match “City Security Services (CSS) have more than 25 years’ experience within the corporate security, public sector, education and social housing markets delivering manned guarding…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Alertsystems LTD	Exact match	Trowbridge, United KingdomHQ recorded Sep 19, 2026	51-200	61 contacts →
	Exact match “AlertSystems specialise in the design, installation, service, and maintenance of commercial electronic security and fire safety systems.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	WLS	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	61 contacts →
	Exact match “WLS (West London Security) has been providing security and solutions to London's homes and businesses for over 40 years.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	PFS Group	Exact match	Southend-on-sea, United KingdomHQ recorded Sep 19, 2026	51-200	56 contacts →
	Exact match “PFS Group Limited is an independently owned Fire & Security company that has been established since 1998.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Logic Fire And Security	Exact match	Knaresborough, United KingdomHQ recorded Sep 19, 2026	11-50	55 contacts →
	Exact match “At Logic Fire and Security we design, supply, install, commission and maintain fire detection systems and electronic security systems throughout the UK.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	ACE Fire And Security	Exact match	Bedford, United KingdomHQ recorded Sep 19, 2026	51-200	52 contacts →
	Exact match “Established in 1990, Ace Fire & Security is an end-to-end security, occupant safety, systems integration, monitoring and fire solutions specialist for commercial, industrial site…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Thompson Group	Exact match	Wolverhampton, United KingdomHQ recorded Sep 19, 2026	51-200	52 contacts →
	Exact match “The Thompson Group offer specialist design, installation, service and maintenance of integrated security, fire, communications, audio visual and life safety systems for…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	The Protector Group	Exact match	Gateshead, United KingdomHQ recorded Sep 19, 2026	201-500	52 contacts →
	Exact match “The Protector Group are a multi disciplined security company specializing in Manned Guarding, CCTV installation, maintenance and monitoring, Intruder and Fire alarm installation…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “alarm system companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 1,921 alarm system companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 7,281 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Alarm system companies based in the United Kingdom at a glance

As of Sep 19, 2026

35.9%Verified-email coverage

10.6Average contacts per company

1-10Median size (employees)

8.7%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,125

11-50

601

51-200

138

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 1,921 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “alarm system companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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: Every displayed company carries at least one verified work email. RevenueBase tracks 7,281 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Alarm system companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “alarm system companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many alarm system companies are there based in the United Kingdom?

RevenueBase identified 1,921 company matches for alarm system companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Chubb Fire & Security tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most alarm system companies?

London leads with 167 company records, followed by Manchester (43) and Glasgow (27).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 7,281 professional contacts with verified work emails tracked across these 1,921 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.