Company lists · Data refreshed September 2026
Top 25 Network security companies for buildings based in the United Kingdom
RevenueBase identified 527 network security companies for buildings headquartered in the United Kingdom as of September 2026 and tracks 2,933 professional contacts across them, including 868 with verified work emails. London is the largest hub.
This list covers network security companies for buildings 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 29, 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.
The 25 largest network security companies for buildings based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 125 contacts → | ||||
Strong evidence “KHIPU Networks is an award winning international Cyber Security Company delivering a wide range of network, wireless and security solutions, technologies and services across…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 116 contacts → | ||||
Partial evidence “TSP has a reputation for providing enterprise security solutions, as well as excellent system integration standards and exceptional aftercare support, since its founding in 1988.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 87 contacts → | ||||
Partial evidence “Scutum Fire & Security Ltd.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 61 contacts → | ||||
Partial evidence “WLS (West London Security) has been providing security and solutions to London's homes and businesses for over 40 years.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 45 contacts → | ||||
Indirect evidence “Backbone Connect is a dynamic technology firm specialising in solving the unique technological challenges of commercial real estate.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 34 contacts → | ||||
Partial evidence “We specialise in delivering and maintaining integrated security systems for leading companies in the UK and across Europe, Middle East & Africa.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 32 contacts → | ||||
Partial evidence “Syncro Fire & Security provides bespoke fire and security solutions to commercial and industrial businesses throughout the UK; and is a highly respected name within the fire…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 32 contacts → | ||||
Partial evidence “Founded in 1974, Lincoln Security Ltd.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 30 contacts → | ||||
Partial evidence “WELCOME TO VIS SECURITY SOLUTIONS LIMITED Headquartered in the UK and Ireland, ViS specialises in providing bespoke physical security solutions by converging multiple advanced…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 24 contacts → | ||||
Partial evidence “Reflex Systems is a leading UK owned security and fire systems specialist, established in 1987 and based in South Yorkshire.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 24 contacts → | ||||
Partial evidence “At 1st Ace Security we are specialists in providing security solutions across South London for both domestic and commercial properties.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 24 contacts → | ||||
Partial evidence “Securafit is a family run security company based within Kent.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 24 contacts → | ||||
Partial evidence “Nanjgel Solutions is focused on delivering the best IT security for businesses.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 23 contacts → | ||||
Partial 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 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 23 contacts → | ||||
Partial evidence “Who are you… Most likely you are a Workplace or IT Professional with a lot on your plate including physical electronic security systems, such as - Access control - CCTV - Intruder…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 23 contacts → | ||||
Partial evidence “Millennium Security operates at numerous sites across the UK, specialising in Rapid Deployment Towers, CCTV, temporary fire systems, wireless video detection, manned guarding, and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 21 contacts → | ||||
Partial evidence “At Amax Fire & Security Ltd we pride ourselves on being expert providers of all your CCTV, fire safety and security needs.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 20 contacts → | ||||
Partial evidence “Advance Fire & Security Ltd is a leading provider of domestic and commercial security systems.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 19 contacts → | ||||
Partial evidence “Bee Tee Alarms Ltd is a well established family owned business evolving from Dove Security, established in 1980 and taking its present identity in 1984.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 17 contacts → | ||||
Partial evidence “Communicate UK in Essex are security specialists with over 25 years of experience, installing high quality security systems into homes and world-class organisations throughout…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 17 contacts → | ||||
Indirect evidence “We are a privately-owned limited company based in East London serving all inside M25 and surrounding areas.(We do have some sites in Oxford, Reading, Margate, Brighton so M25 is…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 17 contacts → | ||||
Partial evidence “Metro Surveillance Group is one of the largest CCTV and security companies in the United Kingdom, based in Cookstown, Co.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 16 contacts → | ||||
Partial evidence “DCA Security Systems Ltd is an electronic fire & security company based out of 6 The Progression Centre, Mark Road, Hemel Hempstead, Hertfordshire.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 16 contacts → | ||||
Partial evidence “Based in Hedge End, Southampton, we offer a full range of fire alarm and security services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 15 contacts → | ||||
Partial evidence “ISM is a Solutions Business with more than 30 years world leading experience in the manufacturing and inventing of integrated security management solutions, encompassing alarm…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
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: network security companies for buildings. 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 network security companies for buildings.
- Partial evidence
- Its own public description names part of network security companies for buildings, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name network security companies for buildings. 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 527 network security companies for buildings based in the United Kingdom
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Network security companies for buildings based in the United Kingdom at a glance
As of Sep 29, 2026Companies by employee count
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 527 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 network security companies for buildings, 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 “network security companies for buildings”. 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 network security companies for buildings), 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 network security companies for buildings, 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, 868 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 29, 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.
Network security companies for buildings by metro
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 network security companies for buildings, 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 network security companies for buildings are there based in the United Kingdom?
RevenueBase identified 527 network security companies for buildings 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?
Khipu Networks, headquartered in Fleet, tops this list with the largest team on record.
Which city has the most network security companies for buildings?
London leads with 66 headquartered companies, followed by Manchester (9) and Leeds (8).
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 868 verified decision-maker contacts tracked across these 527 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 29, 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.
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