Company lists · Data refreshed September 2026
Top 25 Residential security services based in the United Kingdom
RevenueBase identified 562 residential security services headquartered in the United Kingdom as of September 2026 and tracks 3,479 professional contacts across them, including 910 with verified work emails and 156 with mobile numbers. London is the largest hub.
This list covers residential security 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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.
The 25 largest residential security services based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | Marlowe Fire & SecurityPartial evidence | 389 | |||
“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…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 89 | ||||
“For a better service and competitive price try K4 Security Services At K4 we offer the following: 1.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 70 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 64 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | WLSPartial evidence | 61 | |||
“WLS (West London Security) has been providing security and solutions to London's homes and businesses for over 40 years.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 52 | ||||
“Secur-it is a leading provider of security services and risk management.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 51 | ||||
“Portal Security is a leading provider of security services dedicated to safeguarding individuals, businesses, and communities.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 49 | ||||
“CSS is Scotland’s leading supplier and installer of domestic and commercial intruder and fire alarm systems.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 47 | ||||
“We're here to help you sufficiently protect your valued goods - whether its safeguarding items in your home or putting a security strategy in place for your business, we've got…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 46 | ||||
“Risk Management Security Services specialise in providing bespoke security to commercial, residential and Industrial premises.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 43 | ||||
“AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 36 | ||||
“Doyle Security Ltd is a leading provider of professional security solutions, proudly safeguarding businesses, homeowners, and their properties for over four decades.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 33 | ||||
“Established in 1977, Black Box Security is part of the Black Box Group and a highly respected provider of security and life safety solutions to residential, commercial and public…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 32 | ||||
“Founded in 1974, Lincoln Security Ltd.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 32 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | Systematic Security LTDPartial evidence | 31 | |||
“Systematic Security deliver static manned guarding, mobile patrols, open and lock ups, keyholding and emergency response requirements as well as Vacant Property inspections to a…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 28 | ||||
“Protecting homes and businesses since 1982.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | KBO Fire & SecurityIndirect evidence | 27 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 24 | ||||
“At 1st Ace Security we are specialists in providing security solutions across South London for both domestic and commercial properties.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 24 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 24 | ||||
“At Active Security, we offer a fully comprehensive range of fire and security services for domestic, commercial and industrial customers.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 23 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 23 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 22 | ||||
“Based in Aberdeen, Inverness, and now also Glasgow, Aberdeen Alarm Company Ltd offer a range of solutions for your security, fire prevention and locksmith requirements.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 22 | ||||
“Camera Security Services is a family owned and managed business which has been established since 1998; providing integrated security solutions to companies, local authorities…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 562 residential security services based in the United Kingdom
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Residential security services based in the United Kingdom at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 residential security services, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “residential security services”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among residential security 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 an evidence 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, 910 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 5, 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.
Residential security services by metro
- Residential security services in London69
Frequently asked
How many residential security services are there based in the United Kingdom?
RevenueBase identified 562 residential security 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?
Marlowe Fire & Security, headquartered in Manchester, tops this list with the largest team on record.
Which city has the most residential security services?
London leads with 69 headquartered companies, followed by Manchester (15) and Birmingham (11).
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 910 verified decision-maker contacts tracked across these 562 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 5, 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.
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