Company lists · Data refreshed September 2026

Top 25 Alarm monitoring services based in the United Kingdom

Name: Alarm monitoring services 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 654 companies tracked

RevenueBase identified 654 alarm monitoring services headquartered in the United Kingdom as of September 2026 and tracks 4,377 professional contacts across them, including 1,004 with verified work emails. London is the largest hub.

This list covers alarm monitoring services headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

654Companies

4,377Contacts tracked

1,004Verified emails

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The 25 largest alarm monitoring services based in the United Kingdom

Ranked by team size

Top 25 of 654 alarm monitoring services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to alarm monitoring services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Taking Care	Partial evidence	Exeter, United KingdomHQ checked Sep 19, 2026	51-200	106 contacts →
	Partial evidence “Taking Care has been providing personal alarm services for more than 30 years.” Source: RevenueBase Database · checked Sep 19, 2026
2	K4 Security - K4 Group	Indirect evidence	Hounslow, United KingdomHQ checked Sep 19, 2026	201-500	89 contacts →
	Indirect evidence “For a better service and competitive price try K4 Security Services At K4 we offer the following: 1.” Source: RevenueBase Database · checked Sep 19, 2026
3	ABEL	Indirect evidence	Leicester, United KingdomHQ checked Sep 19, 2026	51-200	70 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
4	Northern Security LTD	Partial evidence	Carlisle, United KingdomHQ checked Sep 19, 2026	201-500	69 contacts →
	Partial evidence “Northern Security Ltd is a leading guarding, alarm response and electronic security business operating throughout the North of England and South West Scotland.” Source: RevenueBase Database · checked Sep 19, 2026
5	City Security Services Part Of City Group Security	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	64 contacts →
	Indirect evidence “City Security Services (CSS) have more than 25 years’ experience within the corporate security, public sector, education and social housing markets delivering manned guarding…” Source: RevenueBase Database · checked Sep 19, 2026
6	ACE Fire And Security	Partial evidence	Bedford, United KingdomHQ checked Sep 19, 2026	51-200	52 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
7	Security Monitoring Centres UK & Ireland	Partial evidence	Nottingham, United KingdomHQ checked Sep 19, 2026	201-500	50 contacts →
	Partial evidence “A global security monitoring brand with sister companies in Holland, Belgium and Australia, we recognise that monitoring is an integral part of your business.” Source: RevenueBase Database · checked Sep 19, 2026
8	Connelly Security Systems LTD CSS LTD	Partial evidence	Glasgow, United KingdomHQ checked Sep 19, 2026	51-200	49 contacts →
	Partial evidence “CSS is Scotland’s leading supplier and installer of domestic and commercial intruder and fire alarm systems.” Source: RevenueBase Database · checked Sep 19, 2026
9	East Midlands Central Station Emcs Limited	Partial evidence	Chilwell, United KingdomHQ checked Sep 19, 2026	51-200	45 contacts →
	Partial evidence “East Midlands Central Station (EMCS) Limited is the UK’s leading Alarm Receiving Centre.” Source: RevenueBase Database · checked Sep 19, 2026
10	ARM Secure	Indirect evidence	Warrington, United KingdomHQ checked Sep 19, 2026	201-500	39 contacts →
	Indirect evidence “ARM Secure is a new security company that is part of the Asset Protection Group.” Source: RevenueBase Database · checked Sep 19, 2026
11	Simplisafe UK	Indirect evidence	Manchester, United KingdomHQ checked Sep 19, 2026	11-50	36 contacts →
	Indirect evidence “Being safe should be simple.” Source: RevenueBase Database · checked Sep 19, 2026
12	Rosse Systems	Indirect evidence	Shipley, United KingdomHQ checked Sep 19, 2026	11-50	36 contacts →
	Indirect evidence “Rosse Systems specialises in Active Fire and Security Systems.” Source: RevenueBase Database · checked Sep 19, 2026
13	Smartwatch Solutions LTD	Indirect evidence	Leeds, United KingdomHQ checked Sep 19, 2026	51-200	36 contacts →
	Indirect evidence “Established since 2006 SmartWatch offer a single supplier solution to your security and property management needs.” Source: RevenueBase Database · checked Sep 19, 2026
14	Forward Security Services Limited	Indirect evidence	Huddersfield, United KingdomHQ checked Sep 19, 2026	11-50	36 contacts →
	Indirect evidence “Based in Huddersfield, West Yorkshire.” Source: RevenueBase Database · checked Sep 19, 2026
15	Zicam Systems Group LTD	Partial evidence	Bromsgrove, United KingdomHQ checked Sep 19, 2026	11-50	32 contacts →
	Partial evidence “Zicam specialise in state-of-the-art security disciplines covering remotely monitored CCTV, Access Control, Fire Alarms, Permitter Protection and Intruder Alarm Systems.” Source: RevenueBase Database · checked Sep 19, 2026
16	Prosec UK	Indirect evidence	Doncaster, United KingdomHQ checked Sep 19, 2026	51-200	32 contacts →
	Indirect evidence “Security Specialists A discreet, reliable and effective service Providing highly trained professional security guards and associated round the clock security services and for over…” Source: RevenueBase Database · checked Sep 19, 2026
17	Guide Security	Indirect evidence	Darwen, United KingdomHQ checked Sep 19, 2026	51-200	30 contacts →
	Indirect evidence “Many security companies pull together different providers to deliver a single service.” Source: RevenueBase Database · checked Sep 19, 2026
18	Farsight Security Services LTD	Partial evidence	Peterborough, United KingdomHQ checked Sep 19, 2026	51-200	29 contacts →
	Partial evidence “Farsight Security Services is a market-leading provider of remote monitoring and ARC services.” Source: RevenueBase Database · checked Sep 19, 2026
19	Alert Alarms Family-Run Security Specialists Protecting Homes & Businesses Since 1982	Indirect evidence	Redditch, United KingdomHQ checked Sep 19, 2026	1-10	28 contacts →
	Indirect evidence “Protecting homes and businesses since 1982.” Source: RevenueBase Database · checked Sep 19, 2026
20	KBO Fire & Security	Indirect evidence	Camberley, United KingdomHQ checked Sep 19, 2026	51-200	27 contacts →
	Indirect evidence “For over 30 years, we’ve been making life more secure for home owners and businesses across London, Surrey, Hampshire and the surrounding counties.” Source: RevenueBase Database · checked Sep 19, 2026
21	Pyrocel Fire And Security Limited	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 19, 2026	51-200	27 contacts →
	Partial evidence “Pyrocel Ltd provides the following state of the art electronic products and services: • Fire Detection & Alarm Systems • Security Systems (Intruder, CCTV & Access) • Assistive…” Source: RevenueBase Database · checked Sep 19, 2026
22	Building Protection Systems	Indirect evidence	Belfast, United KingdomHQ checked Sep 19, 2026	11-50	25 contacts →
	Indirect evidence “We provide both New Build Solutions and Maintenance Contracts for companies throughout the UK & Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
23	Close Protection Security NE	Indirect evidence	Darlington, United KingdomHQ checked Sep 19, 2026	51-200	24 contacts →
	Indirect evidence “Close Protection Security is an industry-leading security company, established in 2017 and based in the North East of England, created by Glenn Bartlett.” Source: RevenueBase Database · checked Sep 19, 2026
24	Cougar Monitoring LTD	Partial evidence	Cradley Heath, United KingdomHQ checked Sep 19, 2026	51-200	23 contacts →
	Partial evidence “At Cougar Monitoring no matter if it's a residential, commercial or industry property, we can provide, install and full monitor a wide range of security solutions, such as; CCTV…” Source: RevenueBase Database · checked Sep 19, 2026
25	Brunel Fire & Security	Indirect evidence	Portishead, United KingdomHQ checked Sep 19, 2026	11-50	23 contacts →
	Indirect evidence “part of the Obsequio Group At Brunel, we provide advanced security and life protection solutions, ensuring that your business and assets are safeguarded with the highest standards…” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: alarm monitoring services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names alarm monitoring services.
Partial evidence: Its own public description names part of alarm monitoring services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name alarm monitoring services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 654 alarm monitoring services based in the United Kingdom

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Alarm monitoring services based in the United Kingdom at a glance

As of Sep 19, 2026

22.9%Verified-email coverage

6.7Average contacts per company

1-10Median size (employees)

8.9%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

380

11-50

194

51-200

201-500

501-1,000

1,001-5,000

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 654 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among alarm monitoring services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “alarm monitoring services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names alarm monitoring services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among alarm monitoring services, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,004 across the full list. 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.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Alarm monitoring services by metro

Alarm monitoring services in London58

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names alarm monitoring services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 654 alarm monitoring services headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Taking Care, headquartered in Exeter, tops this list with the largest team on record.

Which city has the most alarm monitoring services?

London leads with 58 headquartered companies, followed by Manchester (14) and Glasgow (12).

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 1,004 verified decision-maker contacts tracked across these 654 companies.

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 Smart Search, 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.