Company lists · Data refreshed October 2026

Top 25 Monitoring alarm system suppliers based in the United Kingdom

Name: Monitoring alarm system suppliers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 28, 2026 1,458 companies tracked

RevenueBase identified 1,458 company matches for monitoring alarm system suppliers associated with the United Kingdom as of October 2026 and tracks 16,937 professional contacts across them, including 5,648 with verified work emails. London is the largest hub.

This list covers company matches for monitoring alarm system suppliers 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 October 28, 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 Oct 28, 2026 How this list was built

1,458Companies

16,937Contacts tracked

5,648Verified emails

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The 25 largest monitoring alarm system suppliers based in the United Kingdom

Ranked by team size

Top 25 of 1,458 company matches for monitoring alarm system suppliers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 28, 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 Oct 28, 2026	10001+	6,400 contacts →
	Exact match “Making the world a safer place.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
2	Global Security	Exact match	Blackburn, United KingdomHQ recorded Oct 28, 2026	n/a	417 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 · Oct 28, 2026 · View company records in RevenueBase
3	Kings Secure Technologies	Exact match	Bradford, United KingdomHQ recorded Oct 28, 2026	501-1,000	347 contacts →
	Exact match “Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
4	Marlowe Fire & Security	Exact match	Manchester, United KingdomHQ recorded Oct 28, 2026	501-1,000	305 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 · Oct 28, 2026 · View company records in RevenueBase
5	The Keyholding Company	Exact match	London, United KingdomHQ recorded Oct 28, 2026	51-200	154 contacts →
	Exact match “The Keyholding Company are a tech-enabled mobile security services company, specialising in alarm response, mobile patrols, locks and unlocks, emergency and temporary guarding…” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
6	Frontline Security Solutions	Exact match	Chalfont St Peter, United KingdomHQ recorded Oct 28, 2026	51-200	146 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 · Oct 28, 2026 · View company records in RevenueBase
7	Senseco Systems Limited	Exact match	Gillingham, United KingdomHQ recorded Oct 28, 2026	201-500	130 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 · Oct 28, 2026 · View company records in RevenueBase
8	Global Fire & Security Systems	Exact match	Nottingham, United KingdomHQ recorded Oct 28, 2026	51-200	126 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 · Oct 28, 2026 · View company records in RevenueBase
9	K4 Security - K4 Group	Exact match	Hounslow, United KingdomHQ recorded Oct 28, 2026	201-500	97 contacts →
	Exact match “For a better service and competitive price try K4 Security Services At K4 we offer the following: 1.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
10	Scutum UK	Exact match	Chertsey, United KingdomHQ recorded Oct 28, 2026	201-500	86 contacts →
	Exact match “Scutum Fire & Security Ltd.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
11	ABEL	Exact match	Leicester, United KingdomHQ recorded Oct 28, 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 · Oct 28, 2026 · View company records in RevenueBase
12	Northern Security LTD	Exact match	Carlisle, United KingdomHQ recorded Oct 28, 2026	201-500	67 contacts →
	Exact match “Northern Security Ltd is a leading guarding, alarm response and electronic security business operating throughout the North of England and South West Scotland.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
13	City Security Services Part Of City Group Security	Exact match	London, United KingdomHQ recorded Oct 28, 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 · Oct 28, 2026 · View company records in RevenueBase
14	Alertsystems LTD	Exact match	Trowbridge, United KingdomHQ recorded Oct 28, 2026	51-200	60 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 · Oct 28, 2026 · View company records in RevenueBase
15	Logic Fire And Security	Exact match	Knaresborough, United KingdomHQ recorded Oct 28, 2026	11-50	56 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 · Oct 28, 2026 · View company records in RevenueBase
16	The Protector Group	Exact match	Gateshead, United KingdomHQ recorded Oct 28, 2026	201-500	54 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 · Oct 28, 2026 · View company records in RevenueBase
17	Sensetech Systems LTD	Exact match	London, United KingdomHQ recorded Oct 28, 2026	51-200	53 contacts →
	Exact match “Sensetech Systems Ltd is an LPS1014 Accredited independent Fire Alarm, Security and Structured Data Cabling Company.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
18	ACE Fire And Security	Exact match	Bedford, United KingdomHQ recorded Oct 28, 2026	51-200	48 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 · Oct 28, 2026 · View company records in RevenueBase
19	Security Monitoring Centres UK & Ireland	Exact match	Nottingham, United KingdomHQ recorded Oct 28, 2026	201-500	48 contacts →
	Exact match “A global security monitoring brand with sister companies in Holland, Belgium and Australia, we recognise that monitoring is an integral part of your business.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
20	Jackson Fire & Security UK LTD	Exact match	Mold, United KingdomHQ recorded Oct 28, 2026	51-200	47 contacts →
	Exact match “We protect your people and property 24/7.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
21	The Chris Lewis Group	Exact match	Oxford, United KingdomHQ recorded Oct 28, 2026	51-200	47 contacts →
	Exact match “Since 1993, The Chris Lewis Group has been the trusted fire, security and smart technology partner for homeowners and businesses across Oxfordshire, Berkshire, Buckinghamshire…” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
22	Custom Intelligent Security	Exact match	London, United KingdomHQ recorded Oct 28, 2026	51-200	46 contacts →
	Exact match “Established in Custom Intelligent Security is a technology driven ISO27001 & NSi Gold Accredited independent electronic security specialist with a proven track record of…” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
23	Connelly Security Systems LTD CSS LTD	Exact match	Glasgow, United KingdomHQ recorded Oct 28, 2026	51-200	46 contacts →
	Exact match “CSS is Scotland’s leading supplier and installer of domestic and commercial intruder and fire alarm systems.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
24	Ak9 Security And FM Solutions LTD	Exact match	London, United KingdomHQ recorded Oct 28, 2026	501-1,000	46 contacts →
	Exact match “AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
25	Risk Management Security Services	Exact match	High Wycombe, United KingdomHQ recorded Oct 28, 2026	51-200	46 contacts →
	Exact match “Risk Management Security Services specialise in providing bespoke security to commercial, residential and Industrial premises.” Recorded in the RevenueBase company graph · Oct 28, 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 “monitoring alarm system suppliers”. 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 1,458 monitoring alarm system suppliers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 5,648 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Monitoring alarm system suppliers based in the United Kingdom at a glance

As of Oct 28, 2026

33.3%Verified-email coverage

11.6Average contacts per company

1-10Median size (employees)

9.0%Largest-city concentration · London

Oct 28, 2026Page data refreshed

Companies by employee count

1-10

826

11-50

469

51-200

115

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 1,458 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 “monitoring alarm system suppliers” 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 5,648 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 October 28, 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.

Monitoring alarm system suppliers 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 “monitoring alarm system suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 1,458 company matches for monitoring alarm system suppliers associated with the United Kingdom as of October 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 monitoring alarm system suppliers?

London leads with 131 company records, followed by Manchester (33) and Glasgow (20).

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 5,648 professional contacts with verified work emails tracked across these 1,458 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 October 28, 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.