Company lists · Data refreshed September 2026

Top 25 Cyber-physical security companies based in the United Kingdom

Name: Cyber-physical security 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 1, 2026 1,518 companies tracked

RevenueBase identified 1,518 cyber-physical security companies headquartered in the United Kingdom as of September 2026 and tracks 37,026 professional contacts across them, including 11,898 with verified work emails and 3,238 with mobile numbers. London is the largest hub.

This list covers cyber-physical security companies 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

1,518Companies

37,026Contacts tracked

11,898Verified emails

3,238Mobile numbers

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The 25 largest cyber-physical security companies based in the United Kingdom

Ranked by team size

Top 25 of 1,518 cyber-physical security companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to cyber-physical 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	Chubb Fire & Security	Indirect evidence	Staines, United Kingdom	10001+	6,212 contacts →
	Indirect evidence “Making the world a safer place.” Source: RevenueBase Database · checked Sep 1, 2026
2	Mitie Security	Partial evidence	Northampton, United Kingdom	10001+	1,513 contacts →
	Partial evidence “We are an intelligence-led security business.” Source: RevenueBase Database · checked Sep 1, 2026
3	CIS Security Limited	Partial evidence	London, United Kingdom	1,001-5,000	913 contacts →
	Partial evidence “CIS Security is an independent security company equipped to help customers to solve the complex challenges in today’s digital, connected and regulated business world.” Source: RevenueBase Database · checked Sep 1, 2026
4	SISA	Partial evidence	Leicester, United Kingdom	201-500	739 contacts →
	Partial evidence “SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…” Source: RevenueBase Database · checked Sep 1, 2026
5	Claroty	Strong evidence	London, United Kingdom	501-1,000	729 contacts →
	Strong evidence “Claroty has redefined cyber-physical systems (CPS) protection with an unrivaled industry-centric platform built to secure mission-critical infrastructure.” Source: RevenueBase Database · checked Sep 1, 2026
6	Everfox	Indirect evidence	London, United Kingdom	1,001-5,000	635 contacts →
	Indirect evidence “Everfox delivers trusted connectivity to protect the world's most critical environments, safeguarding the sensitive information behind decision advantage.” Source: RevenueBase Database · checked Sep 1, 2026
7	Opsec Security	Partial evidence	Washington, United Kingdom	501-1,000	450 contacts →
	Partial evidence “OpSec Security is the global leader in protecting, authenticating, and enhancing our customers' brands, services and revenues.” Source: RevenueBase Database · checked Sep 1, 2026
8	Lodge Security	Partial evidence	Cirencester, United Kingdom	1,001-5,000	419 contacts →
	Partial evidence “Unlike traditional security providers, we're redefining what protection means in today's world.” Source: RevenueBase Database · checked Sep 1, 2026
9	Marlowe Fire & Security	Partial evidence	Newcastle Upon Tyne, United Kingdom	501-1,000	398 contacts →
	Partial evidence “Marlowe Fire & Security provides a total, end to end, fire and security solution to commercial, public sector and residential customers throughout the UK.” Source: RevenueBase Database · checked Sep 1, 2026
10	Avigilon	Indirect evidence	Milton Keynes, United Kingdom	1,001-5,000	341 contacts →
	Indirect evidence “Avigilon was acquired by Motorola Solutions in 2018.” Source: RevenueBase Database · checked Sep 1, 2026
11	Hanwha Vision Europe	Partial evidence	Salford, United Kingdom	201-500	333 contacts →
	Partial evidence “Hanwha Vision Europe offers robust and reliable video surveillance products and solutions that are designed to meet the current and future needs of security professionals.” Source: RevenueBase Database · checked Sep 1, 2026
12	Kings Secure Technologies	Indirect evidence	London, United Kingdom	501-1,000	326 contacts →
	Indirect evidence “Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.” Source: RevenueBase Database · checked Sep 1, 2026
13	Bridewell	Strong evidence	Edinburgh, United Kingdom	201-500	304 contacts →
	Strong evidence “Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Source: RevenueBase Database · checked Sep 1, 2026
14	Quorum Cyber	Partial evidence	Edinburgh, United Kingdom	201-500	292 contacts →
	Partial evidence “At Quorum Cyber, we're on a mission to help good people win.” Source: RevenueBase Database · checked Sep 1, 2026
15	Northland Controls	Strong evidence	Letchworth Garden City, United Kingdom	201-500	266 contacts →
	Strong evidence “Northland Controls designs, installs, manages and harmonizes physical security systems across the globe with unparalleled services.” Source: RevenueBase Database · checked Sep 1, 2026
16	Evolution Electronic Security Systems LTD	Partial evidence	Birmingham, United Kingdom	201-500	202 contacts →
	Partial evidence “Founded in 1996 we have grown into one of the UK and Ireland’s leading qualified and accredited security and fire systems integrators, working across Europe to bring together…” Source: RevenueBase Database · checked Sep 1, 2026
17	Openview Security Solutions Limited	Partial evidence	Romford, United Kingdom	201-500	200 contacts →
	Partial evidence “OpenView Security Solutions is the UK’S largest privately owned independent security company and provides unique, innovative and technologically excellent solutions to meet…” Source: RevenueBase Database · checked Sep 1, 2026
18	Texecom LTD	Indirect evidence	Haslingden, United Kingdom	201-500	173 contacts →
	Indirect evidence “Looking after the things people care about, wherever they are’.” Source: RevenueBase Database · checked Sep 1, 2026
19	Exclusive Networks UK	Indirect evidence	Mansfield, United Kingdom	201-500	168 contacts →
	Indirect evidence “Exclusive Networks is a global trusted cybersecurity specialist for digital infrastructure helping to drive the transition to a totally trusted digital future for all people and…” Source: RevenueBase Database · checked Sep 1, 2026
20	Trigion Security Services LTD	Partial evidence	Sidcup, United Kingdom	201-500	166 contacts →
	Partial evidence “Trigion Security Services is the UK provider of Security Guarding and Technical Solutions for Facilicom UK.” Source: RevenueBase Database · checked Sep 1, 2026
21	Senseco Systems Limited	Partial evidence	Gillingham, United Kingdom	201-500	108 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 1, 2026
22	Nedap Security	Indirect evidence	Reading, United Kingdom	1,001-5,000	94 contacts →
	Indirect evidence “ACCESS CONTROL THAT SETS YOU FREE We bring freedom to everyday life, by protecting people, places and possessions.” Source: RevenueBase Database · checked Sep 1, 2026
23	Croma Security Solutions Group PLC Cssg	Partial evidence	Basingstoke Hamsphire, United Kingdom	501-1,000	87 contacts →
	Partial evidence “Croma Security Solutions Group (CSSG) began in 1970 as a family-run business in Shirley, Southampton, known as County Locksmiths.” Source: RevenueBase Database · checked Sep 1, 2026
24	Ea-Rs Group LTD	Partial evidence	Drumbo Lisburn, United Kingdom	201-500	78 contacts →
	Partial evidence “EA-RS Group consists of specialist Fire, Life Safety and Security Companies across the UK and Ireland who provide a full end to end One Solution Offering solution for our clients.” Source: RevenueBase Database · checked Sep 1, 2026
25	City Security Services Part Of City Group Security	Partial evidence	London, United Kingdom	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 1, 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: cyber-physical 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 cyber-physical security companies.
Partial evidence: Its own public description names part of cyber-physical security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cyber-physical 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 1,518 cyber-physical security companies based in the United Kingdom

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Cyber-physical security companies based in the United Kingdom at a glance

As of Sep 1, 2026

32.1%Verified-email coverage

8.7%Mobile-number coverage

24.4Average contacts per company

11-50Median size (employees)

18.1%Largest-city concentration · London

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

690

11-50

513

51-200

190

201-500

501-1,000

1,001-5,000

10001+

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 cyber-physical 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 the United Kingdom whose own description of what they do matches “cyber-physical 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 cyber-physical 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 cyber-physical security companies, 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, 11,898 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 1, 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.

Cyber-physical security companies by metro

Cyber-physical security companies in London274
Cyber-physical security companies in Manchester35
Cyber-physical security companies in Birmingham26
Cyber-physical security companies in Leeds25

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 cyber-physical 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 cyber-physical security companies are there based in the United Kingdom?

RevenueBase identified 1,518 cyber-physical security companies 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?

Chubb Fire & Security, headquartered in Staines, tops this list with the largest team on record.

Which city has the most cyber-physical security companies?

London leads with 274 headquartered companies, followed by Manchester (35) and Birmingham (26).

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 11,898 verified decision-maker contacts tracked across these 1,518 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 1, 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.