Company lists · Data refreshed September 2026

Top 25 Residential security companies based in London, United Kingdom

Name: Residential security companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 173 companies tracked

RevenueBase identified 173 residential security companies headquartered in London, United Kingdom as of September 2026 and tracks 80,885 professional contacts across them, including 289 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers residential security companies headquartered in London, 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 14, 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 14, 2026 86% judged on-target in blind review

173Companies

80,885Contacts tracked

289Verified emails

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The 25 largest residential security companies based in London, United Kingdom

Ranked by team size

Top 25 of 173 residential security companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to residential security companies: 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	G4s	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	10001+	79,699 contacts →
	Partial evidence “G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security…” Source: RevenueBase Database · checked Sep 14, 2026
2	Interr	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	1,001-5,000	232 contacts →
	Indirect evidence “Established in 1994, Interr is a specialist agency providing intelligent guarding, reception, remote monitoring & response and front of house solutions within the retail, hotel…” Source: RevenueBase Database · checked Sep 14, 2026
3	The Keyholding Company	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	137 contacts →
	Partial evidence “The Keyholding Company are a tech-enabled mobile security services company, specialising in alarm response, mobile patrols, locks and unlocks, emergency and temporary guarding…” Source: RevenueBase Database · checked Sep 14, 2026
4	City Security Services Part Of City Group Security	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	201-500	64 contacts →
	Partial 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 14, 2026
5	Ak9 Security And FM Solutions LTD	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	501-1,000	43 contacts →
	Strong evidence “AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Source: RevenueBase Database · checked Sep 14, 2026
6	Systematic Security LTD	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	201-500	31 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 14, 2026
7	Line Security Services LTD	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	17 contacts →
	Partial evidence “As a security services provider, protecting people and assets is our top priority.” Source: RevenueBase Database · checked Sep 14, 2026
8	SSG Support Services Group LTD	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	201-500	16 contacts →
	Partial evidence “SSG Support Services Group LTD is specialists in provision of Manned guarding Security Services, Door Supervision, Security Guarding, Out of Hours Support, Concierge, Front of…” Source: RevenueBase Database · checked Sep 14, 2026
9	Integrated Visual Protection Limited	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	16 contacts →
	Partial evidence “Integrated Visual Protection Limited (IVP) is a privately owned Company, which has been established since 2002, providing all types of Fire and Security Services to a variety of…” Source: RevenueBase Database · checked Sep 14, 2026
10	Amity Group INC Amity Security	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	14 contacts →
	Indirect evidence “The definition of Amity is peaceful and friendly, as such we aim to live up to our name.” Source: RevenueBase Database · checked Sep 14, 2026
11	Intraguard Limited	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	12 contacts →
	Partial evidence “Our partnership approach to understanding your security needs and developing a bespoke service enables us to cater to all kinds of security requirements.” Source: RevenueBase Database · checked Sep 14, 2026
12	LDN Security Solutions Limited	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	1-10	10 contacts →
	Strong evidence “London-based security company specialising in the design, installation, service and maintenance of single domestic, multi-occupancy residential and commercial security systems.” Source: RevenueBase Database · checked Sep 14, 2026
13	SSG Security	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	10 contacts →
	Partial evidence “SSG Security provides security for different business security needs.” Source: RevenueBase Database · checked Sep 14, 2026
14	Delta Security 1962 LTD	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	8 contacts →
	Indirect evidence “Our goal is so simple we can sum it up in one word - quality.” Source: RevenueBase Database · checked Sep 14, 2026
15	Pacific Business Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	8 contacts →
	Partial evidence “We take your security seriously and ensure that you and your property are safe and in secure hands.” Source: RevenueBase Database · checked Sep 14, 2026
16	Security Installation Services LTD	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	1-10	7 contacts →
	Partial evidence “Security Installation Services Ltd provide a fast and efficient security service across Greater London and North Kent that includes the installation and maintenance of a wide…” Source: RevenueBase Database · checked Sep 14, 2026
17	Buffalo Security LTD	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	6 contacts →
	Partial evidence “A security team needs to do more than just protect your interests; it needs to contribute in raising the standards of the experience that your guests expect (and receive) at your…” Source: RevenueBase Database · checked Sep 14, 2026
18	Poseidon Security Special Services	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	5 contacts →
	Partial evidence “With over 10 years in the security industry, we have built a reputation for reliability, professionalism, and unparalleled customer service.” Source: RevenueBase Database · checked Sep 14, 2026
19	Dram Fire & Security	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	1-10	4 contacts →
	Partial evidence “We are one of London’s leading providers of high-quality security and fire detection solutions, DRAM Fire & Security was founded in 2009, and carries a wealth of knowledge and…” Source: RevenueBase Database · checked Sep 14, 2026
20	Ge4orce Fire & Security Solutions	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	1-10	4 contacts →
	Partial evidence “We provide CCTV, alarm systems, access control and fire safety solutions for residential and commercial properties across London.” Source: RevenueBase Database · checked Sep 14, 2026
21	I & S Services LTD	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	4 contacts →
	Indirect evidence “Founded in 2006, I&S has established itself as a trusted agency, building relations with some of the most well respected and high-profile venues and organisations in the…” Source: RevenueBase Database · checked Sep 14, 2026
22	Balthorne Security Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	4 contacts →
	Partial evidence “At Balthorne Security Solutions, we understand the risks people face and the importance of reliable security.” Source: RevenueBase Database · checked Sep 14, 2026
23	Tutumhome	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	1-10	3 contacts →
	Partial evidence “Tutum Home is Europe's first smart home security and home automation service provider with no long term contracts.” Source: RevenueBase Database · checked Sep 14, 2026
24	Spire Security Limited	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	1-10	3 contacts →
	Partial evidence “Spire specialises in Fire and Security systems across London, Midlands & the Home Counties with 3 years guarantee as standard on all service and parts.” Source: RevenueBase Database · checked Sep 14, 2026
25	Hunter Group Security	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	2 contacts →
	Strong evidence “Hunter Group Security is dedicated to providing you the best in both commercial and residential security patrols.” Source: RevenueBase Database · checked Sep 14, 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: residential security companies. 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 residential security companies.
Partial evidence: Its own public description names part of residential security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name residential security companies. 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 173 residential security companies based in London, United Kingdom

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Residential security companies based in London, United Kingdom at a glance

As of Sep 14, 2026

0.4%Verified-email coverage

467.5Average contacts per company

11-50Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 173 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 residential security companies, 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 London, United Kingdom whose own description of what they do matches “residential security companies”. 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 residential security companies), 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 residential security companies, and records with no verified work email. Companies headquartered outside London 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, 289 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 14, 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 companies by metro in the United Kingdom

Residential security companies in Manchester27

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 residential security companies, 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 residential security companies are there based in London, United Kingdom?

RevenueBase identified 173 residential security companies headquartered in London, 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?

G4s, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most residential security companies?

London leads the United Kingdom with 173 headquartered companies, followed by Manchester (27) and Birmingham (25).

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 289 verified decision-maker contacts tracked across these 173 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 14, 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.