Company lists · Data refreshed September 2026
Top 25 24/7 security monitoring services based in the United Kingdom
RevenueBase identified 438 company matches for 24/7 security monitoring services associated with the United Kingdom as of September 2026 and tracks 3,328 professional contacts across them, including 580 with verified work emails. London is the largest hub.
This list covers company matches for 24/7 security monitoring services associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 27, 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 24/7 security monitoring services based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 137 contacts → | ||||
Exact match “The Keyholding Company are a tech-enabled mobile security services company, specialising in alarm response, mobile patrols, locks and unlocks, emergency and temporary guarding…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 2 | 89 contacts → | ||||
Exact match “For a better service and competitive price try K4 Security Services At K4 we offer the following: 1.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 3 | 64 contacts → | ||||
Exact match “City Security Services (CSS) have more than 25 years’ experience within the corporate security, public sector, education and social housing markets delivering manned guarding…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 4 | 52 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 5 | 52 contacts → | ||||
Exact match “Secur-it is a leading provider of security services and risk management.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 6 | 51 contacts → | ||||
Exact match “Portal Security is a leading provider of security services dedicated to safeguarding individuals, businesses, and communities.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 7 | 50 contacts → | ||||
Exact match “A global security monitoring brand with sister companies in Holland, Belgium and Australia, we recognise that monitoring is an integral part of your business.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 8 | 49 contacts → | ||||
Exact match “CSS is Scotland’s leading supplier and installer of domestic and commercial intruder and fire alarm systems.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 9 | 46 contacts → | ||||
Exact match “Risk Management Security Services specialise in providing bespoke security to commercial, residential and Industrial premises.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 10 | 43 contacts → | ||||
Exact match “AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 11 | 40 contacts → | ||||
Exact match “We are passionate about protecting the things that are important to our customers - their people or family, their properties, their possessions/contents and equipment.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 12 | 36 contacts → | ||||
Exact match “Doyle Security Ltd is a leading provider of professional security solutions, proudly safeguarding businesses, homeowners, and their properties for over four decades.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 13 | 36 contacts → | ||||
Exact match “Based in Huddersfield, West Yorkshire.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 14 | 32 contacts → | ||||
Exact match “Zicam specialise in state-of-the-art security disciplines covering remotely monitored CCTV, Access Control, Fire Alarms, Permitter Protection and Intruder Alarm Systems.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 15 | 32 contacts → | ||||
Exact match “Intrinsic Security is a UK-headquartered cybersecurity firm delivering 24/7 threat detection, incident response, and resilience across cloud, hybrid, OT, IoT, and identity…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 16 | 32 contacts → | ||||
Exact match “Security Specialists A discreet, reliable and effective service Providing highly trained professional security guards and associated round the clock security services and for over…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 17 | 32 contacts → | ||||
Exact match “Security is what makes people feel most at ease.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 18 | 30 contacts → | ||||
Exact match “Many security companies pull together different providers to deliver a single service.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 19 | 29 contacts → | ||||
Exact match “Farsight Security Services is a market-leading provider of remote monitoring and ARC services.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 20 | 28 contacts → | ||||
Exact match “Protecting homes and businesses since 1982.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 21 | 24 contacts → | ||||
Exact match “Close Protection Security is an industry-leading security company, established in 2017 and based in the North East of England, created by Glenn Bartlett.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 22 | 23 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 23 | 23 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 24 | 22 contacts → | ||||
Exact match “Camera Security Services is a family owned and managed business which has been established since 1998; providing integrated security solutions to companies, local authorities…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 25 | 22 contacts → | ||||
Exact match “S P E C I A L I S T S E C U R I T Y S E R V I C E S Executive Security Solutions Ltd (ESS) is a specialist security services provider dedicated to delivering 24/7 protection for…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “24/7 security monitoring services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 438 24/7 security monitoring services based in the United Kingdom
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24/7 security monitoring services based in the United Kingdom at a glance
As of Sep 27, 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 438 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- 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
- Company records associated with the United Kingdom whose business descriptions match “24/7 security monitoring services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 580 professional contacts with verified work emails across the full matched dataset. 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 27, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
24/7 security monitoring services by metro
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “24/7 security monitoring services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many 24/7 security monitoring services are there based in the United Kingdom?
RevenueBase identified 438 company matches for 24/7 security monitoring services associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
The Keyholding Company tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most 24/7 security monitoring services?
London leads with 57 company records, followed by Manchester (10) and Glasgow (8).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 580 professional contacts with verified work emails tracked across these 438 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.
Ready to reach these companies? Verified emails and direct dials for all 438 24/7 security monitoring services based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
24/7 security monitoring services by geography
- 24/7 security monitoring services based in Sao Paulo, Brazil
- 24/7 security monitoring services based in Toronto, Canada
- 24/7 security monitoring services based in London, United Kingdom
- 24/7 security monitoring services based in Houston, United States
- 24/7 security monitoring services based in Los Angeles, United States
- 24/7 security monitoring services based in New York, United States
- 24/7 security monitoring services based in Argentina
- 24/7 security monitoring services based in Australia
- 24/7 security monitoring services based in Belgium
- 24/7 security monitoring services based in Brazil
- 24/7 security monitoring services based in Canada
- 24/7 security monitoring services based in Chile
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- 24/7 security monitoring services based in Sao Paulo, Brazil
- 24/7 security monitoring services based in Toronto, Canada
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Company intelligence · public preview
Top 25 24/7 security monitoring services based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 438 matching company records for 24/7 security monitoring services based in the United Kingdom, with 3,328 tracked contacts and 580 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 24/7 security monitoring services based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  The Keyholding Companykeyholding.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 137 contacts → |
“The Keyholding Company are a tech-enabled mobile security services company, specialising in alarm response, mobile patrols, locks and unlocks, emergency and temporary guarding…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  K4 Security - K4 Groupk4security.co.ukHQ: Hounslow, United KingdomReported employees: 201-500 | Hounslow, United Kingdom | 201-500 | Exact match | 89 contacts → |
“For a better service and competitive price try K4 Security Services At K4 we offer the following: 1.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  City Security Services Part Of City Group Securitycitysecurity.org.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 64 contacts → |
“City Security Services (CSS) have more than 25 years’ experience within the corporate security, public sector, education and social housing markets delivering manned guarding…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  ACE Fire And Securityacesecurity.co.ukHQ: Bedford, United KingdomReported employees: 51-200 | Bedford, United Kingdom | 51-200 | Exact match | 52 contacts → |
“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…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Secur-It Integrated Services LTDsecur-it.co.ukHQ: South Normanton, United KingdomReported employees: 201-500 | South Normanton, United Kingdom | 201-500 | Exact match | 52 contacts → |
“Secur-it is a leading provider of security services and risk management.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Portal Securityportalsecurity.co.ukHQ: Cumbernauld, United KingdomReported employees: 201-500 | Cumbernauld, United Kingdom | 201-500 | Exact match | 51 contacts → |
“Portal Security is a leading provider of security services dedicated to safeguarding individuals, businesses, and communities.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Security Monitoring Centres UK & Irelandsmc-monitoring.comHQ: Nottingham, United KingdomReported employees: 201-500 | Nottingham, United Kingdom | 201-500 | Exact match | 50 contacts → |
“A global security monitoring brand with sister companies in Holland, Belgium and Australia, we recognise that monitoring is an integral part of your business.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Connelly Security Systems LTD CSS LTDcssltd.co.ukHQ: Glasgow, United KingdomReported employees: 51-200 | Glasgow, United Kingdom | 51-200 | Exact match | 49 contacts → |
“CSS is Scotland’s leading supplier and installer of domestic and commercial intruder and fire alarm systems.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Risk Management Security Servicesriskmanagementsecurity.co.ukHQ: High Wycombe, United KingdomReported employees: 51-200 | High Wycombe, United Kingdom | 51-200 | Exact match | 46 contacts → |
“Risk Management Security Services specialise in providing bespoke security to commercial, residential and Industrial premises.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Ak9 Security And FM Solutions LTDak9security.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 43 contacts → |
“AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Absolute Fire & Security Systems Limitedabsolutesfireecurity.co.ukHQ: Godalming, United KingdomReported employees: 11-50 | Godalming, United Kingdom | 11-50 | Exact match | 40 contacts → |
“We are passionate about protecting the things that are important to our customers - their people or family, their properties, their possessions/contents and equipment.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Doyle Security LTDdoylesecurity.co.ukHQ: Dodworth, United KingdomReported employees: 51-200 | Dodworth, United Kingdom | 51-200 | Exact match | 36 contacts → |
“Doyle Security Ltd is a leading provider of professional security solutions, proudly safeguarding businesses, homeowners, and their properties for over four decades.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Forward Security Services Limitedforwardsecurity.uk HQ: Huddersfield, United KingdomReported employees: 11-50 | Huddersfield, United Kingdom | 11-50 | Exact match | 36 contacts → |
“Based in Huddersfield, West Yorkshire.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Zicam Systems Group LTDzicam-security.co.ukHQ: Bromsgrove, United KingdomReported employees: 11-50 | Bromsgrove, United Kingdom | 11-50 | Exact match | 32 contacts → |
“Zicam specialise in state-of-the-art security disciplines covering remotely monitored CCTV, Access Control, Fire Alarms, Permitter Protection and Intruder Alarm Systems.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Intrinsic Securityintrinsic.securityHQ: Peterborough, United KingdomReported employees: 51-200 | Peterborough, United Kingdom | 51-200 | Exact match | 32 contacts → |
“Intrinsic Security is a UK-headquartered cybersecurity firm delivering 24/7 threat detection, incident response, and resilience across cloud, hybrid, OT, IoT, and identity…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Prosec UKprosec.co.ukHQ: Doncaster, United KingdomReported employees: 51-200 | Doncaster, United Kingdom | 51-200 | Exact match | 32 contacts → |
“Security Specialists A discreet, reliable and effective service Providing highly trained professional security guards and associated round the clock security services and for over…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  OSS Securityosssecurity.comHQ: Mossley Hill, United KingdomReported employees: 11-50 | Mossley Hill, United Kingdom | 11-50 | Exact match | 32 contacts → |
“Security is what makes people feel most at ease.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Guide Securityguidesecurity.co.ukHQ: Darwen, United KingdomReported employees: 51-200 | Darwen, United Kingdom | 51-200 | Exact match | 30 contacts → |
“Many security companies pull together different providers to deliver a single service.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Farsight Security Services LTDfarsight.co.ukHQ: Peterborough, United KingdomReported employees: 51-200 | Peterborough, United Kingdom | 51-200 | Exact match | 29 contacts → |
“Farsight Security Services is a market-leading provider of remote monitoring and ARC services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Alert Alarms Family-Run Security Specialists Protecting Homes & Businesses Since 1982alertalarms.co.ukHQ: Redditch, United KingdomReported employees: 1-10 | Redditch, United Kingdom | 1-10 | Exact match | 28 contacts → |
“Protecting homes and businesses since 1982.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Close Protection Security NEcloseprotectionsecurityltd.comHQ: Darlington, United KingdomReported employees: 51-200 | Darlington, United Kingdom | 51-200 | Exact match | 24 contacts → |
“Close Protection Security is an industry-leading security company, established in 2017 and based in the North East of England, created by Glenn Bartlett.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Cougar Monitoring LTDcougarmonitoring.comHQ: Cradley Heath, United KingdomReported employees: 51-200 | Cradley Heath, United Kingdom | 51-200 | Exact match | 23 contacts → |
“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…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Brunel Fire & Securitybrunelsecurity.co.ukHQ: Portishead, United KingdomReported employees: 11-50 | Portishead, United Kingdom | 11-50 | Exact match | 23 contacts → |
“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…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Camera Security Services LTDcamerasecurity.co.ukHQ: Chippenham, United KingdomReported employees: 11-50 | Chippenham, United Kingdom | 11-50 | Exact match | 22 contacts → |
“Camera Security Services is a family owned and managed business which has been established since 1998; providing integrated security solutions to companies, local authorities…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Executive Security Solutions LTDexecutivesecuritysolutions.co.ukHQ: Daventry, United KingdomReported employees: 11-50 | Daventry, United Kingdom | 11-50 | Exact match | 22 contacts → |
“S P E C I A L I S T S E C U R I T Y S E R V I C E S Executive Security Solutions Ltd (ESS) is a specialist security services provider dedicated to delivering 24/7 protection for…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 438 company matches
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24/7 security monitoring services: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
428 records in the displayed employee bands.
10 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 438 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
24/7 security monitoring services by metro
Questions about this company list
What does Exact match mean for 24/7 security monitoring services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many 24/7 security monitoring services did RevenueBase find based in the United Kingdom?
The saved snapshot records 438 matching company records, 3,328 tracked contacts and 580 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
24/7 security monitoring services by geography
- 24/7 security monitoring services based in Sao Paulo, Brazil
- 24/7 security monitoring services based in Toronto, Canada
- 24/7 security monitoring services based in London, United Kingdom
- 24/7 security monitoring services based in Houston, United States
- 24/7 security monitoring services based in Los Angeles, United States
- 24/7 security monitoring services based in New York, United States
- 24/7 security monitoring services based in Argentina
- 24/7 security monitoring services based in Australia
- 24/7 security monitoring services based in Belgium
- 24/7 security monitoring services based in Brazil
- 24/7 security monitoring services based in Canada
- 24/7 security monitoring services based in Chile
Cite this list
RevenueBase Data Team. Top 25 24/7 security monitoring services based in the United Kingdom. Snapshot: September 27, 2026. https://revenuebase.ai/companies/24-7-security-monitoring-services/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- 24/7 security monitoring services based in Sao Paulo, Brazil
- 24/7 security monitoring services based in Toronto, Canada
- 24/7 security monitoring services based in London, United Kingdom
- 24/7 security monitoring services based in Houston, United States
- 24/7 security monitoring services based in Los Angeles, United States
- 24/7 security monitoring services based in New York, United States
Company intelligence · public preview
Top 25 24/7 security monitoring services based in the United Kingdom
RevenueBase records 438 matching company records for 24/7 security monitoring services based in the United Kingdom, with 3,328 tracked contacts and 580 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 24/7 security monitoring services based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | The Keyholding Companykeyholding.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 137 contacts → |
“The Keyholding Company are a tech-enabled mobile security services company, specialising in alarm response, mobile patrols, locks and unlocks, emergency and temporary guarding…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | K4 Security - K4 Groupk4security.co.uk HQ: Hounslow, United KingdomReported employees: 201-500 | Hounslow, United Kingdom | 201-500 | Exact match | 89 contacts → |
“For a better service and competitive price try K4 Security Services At K4 we offer the following: 1.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | City Security Services Part Of City Group Securitycitysecurity.org.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 64 contacts → |
“City Security Services (CSS) have more than 25 years’ experience within the corporate security, public sector, education and social housing markets delivering manned guarding…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | ACE Fire And Securityacesecurity.co.uk HQ: Bedford, United KingdomReported employees: 51-200 | Bedford, United Kingdom | 51-200 | Exact match | 52 contacts → |
“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…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Secur-It Integrated Services LTDsecur-it.co.uk HQ: South Normanton, United KingdomReported employees: 201-500 | South Normanton, United Kingdom | 201-500 | Exact match | 52 contacts → |
“Secur-it is a leading provider of security services and risk management.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Portal Securityportalsecurity.co.uk HQ: Cumbernauld, United KingdomReported employees: 201-500 | Cumbernauld, United Kingdom | 201-500 | Exact match | 51 contacts → |
“Portal Security is a leading provider of security services dedicated to safeguarding individuals, businesses, and communities.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Security Monitoring Centres UK & Irelandsmc-monitoring.com HQ: Nottingham, United KingdomReported employees: 201-500 | Nottingham, United Kingdom | 201-500 | Exact match | 50 contacts → |
“A global security monitoring brand with sister companies in Holland, Belgium and Australia, we recognise that monitoring is an integral part of your business.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Connelly Security Systems LTD CSS LTDcssltd.co.uk HQ: Glasgow, United KingdomReported employees: 51-200 | Glasgow, United Kingdom | 51-200 | Exact match | 49 contacts → |
“CSS is Scotland’s leading supplier and installer of domestic and commercial intruder and fire alarm systems.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Risk Management Security Servicesriskmanagementsecurity.co.uk HQ: High Wycombe, United KingdomReported employees: 51-200 | High Wycombe, United Kingdom | 51-200 | Exact match | 46 contacts → |
“Risk Management Security Services specialise in providing bespoke security to commercial, residential and Industrial premises.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Ak9 Security And FM Solutions LTDak9security.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 43 contacts → |
“AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Absolute Fire & Security Systems Limitedabsolutesfireecurity.co.uk HQ: Godalming, United KingdomReported employees: 11-50 | Godalming, United Kingdom | 11-50 | Exact match | 40 contacts → |
“We are passionate about protecting the things that are important to our customers - their people or family, their properties, their possessions/contents and equipment.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Doyle Security LTDdoylesecurity.co.uk HQ: Dodworth, United KingdomReported employees: 51-200 | Dodworth, United Kingdom | 51-200 | Exact match | 36 contacts → |
“Doyle Security Ltd is a leading provider of professional security solutions, proudly safeguarding businesses, homeowners, and their properties for over four decades.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Forward Security Services Limitedforwardsecurity.uk HQ: Huddersfield, United KingdomReported employees: 11-50 | Huddersfield, United Kingdom | 11-50 | Exact match | 36 contacts → |
“Based in Huddersfield, West Yorkshire.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Zicam Systems Group LTDzicam-security.co.uk HQ: Bromsgrove, United KingdomReported employees: 11-50 | Bromsgrove, United Kingdom | 11-50 | Exact match | 32 contacts → |
“Zicam specialise in state-of-the-art security disciplines covering remotely monitored CCTV, Access Control, Fire Alarms, Permitter Protection and Intruder Alarm Systems.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Intrinsic Securityintrinsic.security HQ: Peterborough, United KingdomReported employees: 51-200 | Peterborough, United Kingdom | 51-200 | Exact match | 32 contacts → |
“Intrinsic Security is a UK-headquartered cybersecurity firm delivering 24/7 threat detection, incident response, and resilience across cloud, hybrid, OT, IoT, and identity…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Prosec UKprosec.co.uk HQ: Doncaster, United KingdomReported employees: 51-200 | Doncaster, United Kingdom | 51-200 | Exact match | 32 contacts → |
“Security Specialists A discreet, reliable and effective service Providing highly trained professional security guards and associated round the clock security services and for over…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | OSS Securityosssecurity.com HQ: Mossley Hill, United KingdomReported employees: 11-50 | Mossley Hill, United Kingdom | 11-50 | Exact match | 32 contacts → |
“Security is what makes people feel most at ease.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Guide Securityguidesecurity.co.uk HQ: Darwen, United KingdomReported employees: 51-200 | Darwen, United Kingdom | 51-200 | Exact match | 30 contacts → |
“Many security companies pull together different providers to deliver a single service.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Farsight Security Services LTDfarsight.co.uk HQ: Peterborough, United KingdomReported employees: 51-200 | Peterborough, United Kingdom | 51-200 | Exact match | 29 contacts → |
“Farsight Security Services is a market-leading provider of remote monitoring and ARC services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Alert Alarms Family-Run Security Specialists Protecting Homes & Businesses Since 1982alertalarms.co.uk HQ: Redditch, United KingdomReported employees: 1-10 | Redditch, United Kingdom | 1-10 | Exact match | 28 contacts → |
“Protecting homes and businesses since 1982.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Close Protection Security NEcloseprotectionsecurityltd.com HQ: Darlington, United KingdomReported employees: 51-200 | Darlington, United Kingdom | 51-200 | Exact match | 24 contacts → |
“Close Protection Security is an industry-leading security company, established in 2017 and based in the North East of England, created by Glenn Bartlett.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Cougar Monitoring LTDcougarmonitoring.com HQ: Cradley Heath, United KingdomReported employees: 51-200 | Cradley Heath, United Kingdom | 51-200 | Exact match | 23 contacts → |
“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…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Brunel Fire & Securitybrunelsecurity.co.uk HQ: Portishead, United KingdomReported employees: 11-50 | Portishead, United Kingdom | 11-50 | Exact match | 23 contacts → |
“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…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Camera Security Services LTDcamerasecurity.co.uk HQ: Chippenham, United KingdomReported employees: 11-50 | Chippenham, United Kingdom | 11-50 | Exact match | 22 contacts → |
“Camera Security Services is a family owned and managed business which has been established since 1998; providing integrated security solutions to companies, local authorities…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Executive Security Solutions LTDexecutivesecuritysolutions.co.uk HQ: Daventry, United KingdomReported employees: 11-50 | Daventry, United Kingdom | 11-50 | Exact match | 22 contacts → |
“S P E C I A L I S T S E C U R I T Y S E R V I C E S Executive Security Solutions Ltd (ESS) is a specialist security services provider dedicated to delivering 24/7 protection for…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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24/7 security monitoring services: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
428 records in the displayed employee bands.
10 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 438 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
24/7 security monitoring services by metro
Questions about this company list
What does Exact match mean for 24/7 security monitoring services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many 24/7 security monitoring services did RevenueBase find based in the United Kingdom?
The saved snapshot records 438 matching company records, 3,328 tracked contacts and 580 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 24/7 security monitoring services based in the United Kingdom. Snapshot: September 27, 2026. https://revenuebase.ai/companies/24-7-security-monitoring-services/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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