Company lists · Data refreshed September 2026
Top 25 Security investigation companies based in the United Kingdom
RevenueBase identified 967 company matches for security investigation companies associated with the United Kingdom as of September 2026 and tracks 9,611 professional contacts across them, including 997 with verified work emails. London is the largest hub.
This list covers company matches for security investigation companies 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 29, 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 security investigation companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 419 contacts → | ||||
Exact match “Ward is an award winning, privately owned business, providing bespoke risk and security solutions including protective security personnel, explosive search dogs, narcotic search…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 2 | 180 contacts → | ||||
Exact match “Established in 1978, Bridgegate Security is proud to be one of the UK’s largest independent security contractors.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 3 | 175 contacts → | ||||
Exact match “We are able to supply a one stop security service for all types of security requirement.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 4 | 166 contacts → | ||||
Exact match “Trigion Security Services is the UK provider of Security Guarding and Technical Solutions for Facilicom UK.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 5 | 163 contacts → | ||||
Exact match “Get Licensed is the UK's leading provider of security training, screening, and staffing solutions.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 6 | 162 contacts → | ||||
Exact match “One of the largest independent security companies in the UK.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 7 | 140 contacts → | ||||
Exact match “Corporate Research and Investigations Limited is a global provider of investigative research, background screening and business due diligence services for the world’s leading…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 8 | 127 contacts → | ||||
Exact match “Vespasian Security was formed in February 2006.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 9 | 126 contacts → | ||||
Exact match “About Kingdom Security Established in March 1993, Kingdom Security is a leading UK security provider delivering professional, fully licensed security services nationwide.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 10 | 117 contacts → | ||||
Exact match “FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 11 | 111 contacts → | ||||
Exact match “We are a well-established company that supplies specialist Close Protection, Door Supervisor services to Private Individuals, Visiting Royal Families, Government Officials…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 12 | 98 contacts → | ||||
Exact match “Rossi Security have been providing Luxury Security services in London and Bicester Village, Oxfordshire since 2009.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 13 | 87 contacts → | ||||
Exact match “Croma Security Solutions Group (CSSG) began in 1970 as a family-run business in Shirley, Southampton, known as County Locksmiths.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 14 | 81 contacts → | ||||
Exact match “Knight Protection has nearly three decades’ experience providing bespoke protection and security solutions to private individuals, private estates, and corporate and public sector…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 15 | 80 contacts → | ||||
Exact match “T3 Security is a leading National Security Company supplying clients across the UK with bespoke security services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 16 | 78 contacts → | ||||
Exact match “We are an SIA Approved Contractor, specializing in Manned Guarding and CCTV solutions.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 17 | 75 contacts → | ||||
Exact match “ELITE SECURITY SERVICES PROVIDER LTD is a security and investigations company based at Lewth Stables, Lewth Lane, Woodplumpton, PR4 0TD United Kingdom.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 18 | 75 contacts → | ||||
Exact match “We are Veteran Owned, Veteran Operated Security company based in London (HQ), with operation nationwide.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 19 | 64 contacts → | ||||
Exact match “United Guarding Services has been a trusted name in the security industry for over 30 years, providing high-performance security solutions for prestigious premises in London and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 20 | 63 contacts → | ||||
Exact match “Vigilance is a pioneering security company with a proud military heritage.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 21 | 60 contacts → | ||||
Exact match “Sentinel Group Security is a fast growing provider of all aspects of security personnel and manned security services operating across the United Kingdom.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 22 | 58 contacts → | ||||
Exact match “Black Diamond Security - Safeguarding Your World.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 23 | 58 contacts → | ||||
Exact match “In today’s advanced, interconnected world, protecting the infrastructure that allows society to function is crucial.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 24 | 53 contacts → | ||||
Exact match “Shield Security Services Limited was incorporated in 1986.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 25 | 52 contacts → | ||||
Exact match “Taybar Security are a leading security services provider, that support a variety of businesses with their specific needs.” Recorded in the RevenueBase company graph · Sep 29, 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 “security investigation companies”. 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 967 security investigation companies based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 997 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Security investigation companies 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 967 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 “security investigation companies” 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 997 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 29, 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.
Security investigation companies 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 “security investigation companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many security investigation companies are there based in the United Kingdom?
RevenueBase identified 967 company matches for security investigation companies 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?
Ward Security tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most security investigation companies?
London leads with 287 company records, followed by Birmingham (31) and Manchester (19).
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 997 professional contacts with verified work emails tracked across these 967 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 29, 2026.
Ready to reach these companies? Verified emails and direct dials for all 967 security investigation companies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Security investigation companies by geography
- Security investigation companies based in Melbourne, Australia
- Security investigation companies based in Sydney, Australia
- Security investigation companies based in Toronto, Canada
- Security investigation companies based in New Delhi, India
- Security investigation companies based in Birmingham, United Kingdom
- Security investigation companies based in London, United Kingdom
- Security investigation companies based in Atlanta, United States
- Security investigation companies based in Austin, United States
- Security investigation companies based in Chicago, United States
- Security investigation companies based in Denver, United States
- Security investigation companies based in Houston, United States
- Security investigation companies based in Las Vegas, United States
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
- Security investigation companies based in Melbourne, Australia
- Security investigation companies based in Sydney, Australia
- Security investigation companies based in Toronto, Canada
- Security investigation companies based in New Delhi, India
- Security investigation companies based in Birmingham, United Kingdom
- Security investigation companies based in London, United Kingdom
Company intelligence · public preview
Top 25 security investigation companies 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 967 matching company records for security investigation companies based in the United Kingdom, with 9,611 tracked contacts and 997 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 29, 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 security investigation companies 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 |  Ward Securityward-security.co.ukHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 419 contacts → |
“Ward is an award winning, privately owned business, providing bespoke risk and security solutions including protective security personnel, explosive search dogs, narcotic search…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Bridgegate Security UK Limitedbridgegate-security.co.ukHQ: Leeds, United KingdomReported employees: 1,001-5,000 | Leeds, United Kingdom | 1,001-5,000 | Exact match | 180 contacts → |
“Established in 1978, Bridgegate Security is proud to be one of the UK’s largest independent security contractors.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Unitrust Protection Servicesunitrust.co.ukHQ: Middx, United KingdomReported employees: 201-500 | Middx, United Kingdom | 201-500 | Exact match | 175 contacts → |
“We are able to supply a one stop security service for all types of security requirement.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Trigion Security Services LTDtrigion.co.ukHQ: Sidcup, United KingdomReported employees: 201-500 | Sidcup, United Kingdom | 201-500 | Exact match | 166 contacts → |
“Trigion Security Services is the UK provider of Security Guarding and Technical Solutions for Facilicom UK.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  GET Licensedget-licensed.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 163 contacts → |
“Get Licensed is the UK's leading provider of security training, screening, and staffing solutions.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Elite Security Groupelitesecuritygroup.co.ukHQ: Swindon, United KingdomReported employees: 51-200 | Swindon, United Kingdom | 51-200 | Exact match | 162 contacts → |
“One of the largest independent security companies in the UK.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Corporate Research And Investigationscrigroup.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 140 contacts → |
“Corporate Research and Investigations Limited is a global provider of investigative research, background screening and business due diligence services for the world’s leading…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Vespasian Securityvespasiansecurity.co.ukHQ: Portsmouth, United KingdomReported employees: 201-500 | Portsmouth, United Kingdom | 201-500 | Exact match | 127 contacts → |
“Vespasian Security was formed in February 2006.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Kingdom Security Serviceskingdom.co.ukHQ: Newton-le-willows, United KingdomReported employees: 5,001-10,000 | Newton-le-willows, United Kingdom | 5,001-10,000 | Exact match | 126 contacts → |
“About Kingdom Security Established in March 1993, Kingdom Security is a leading UK security provider delivering professional, fully licensed security services nationwide.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  FACTfact-uk.org.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 117 contacts → |
“FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Guardforce Security Limitedguardforcesecurity.co.ukHQ: Hornchurch, United KingdomReported employees: 501-1,000 | Hornchurch, United Kingdom | 501-1,000 | Exact match | 111 contacts → |
“We are a well-established company that supplies specialist Close Protection, Door Supervisor services to Private Individuals, Visiting Royal Families, Government Officials…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Rossi Securityrossisecurity.co.ukHQ: Mayfair, United KingdomReported employees: 201-500 | Mayfair, United Kingdom | 201-500 | Exact match | 98 contacts → |
“Rossi Security have been providing Luxury Security services in London and Bicester Village, Oxfordshire since 2009.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Croma Security Solutions Group PLC Cssgcssgplc.comHQ: Whiteley, United KingdomReported employees: 501-1,000 | Whiteley, United Kingdom | 501-1,000 | Exact match | 87 contacts → |
“Croma Security Solutions Group (CSSG) began in 1970 as a family-run business in Shirley, Southampton, known as County Locksmiths.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Knight Protectionknightprotection.co.ukHQ: Camberley, United KingdomReported employees: 201-500 | Camberley, United Kingdom | 201-500 | Exact match | 81 contacts → |
“Knight Protection has nearly three decades’ experience providing bespoke protection and security solutions to private individuals, private estates, and corporate and public sector…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  T3 Securityt3security.co.ukHQ: Seaton Burn, United KingdomReported employees: 501-1,000 | Seaton Burn, United Kingdom | 501-1,000 | Exact match | 80 contacts → |
“T3 Security is a leading National Security Company supplying clients across the UK with bespoke security services.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  H&m Security Services Limitedhmsecurityservices.co.ukHQ: Woodford Green, United KingdomReported employees: 51-200 | Woodford Green, United Kingdom | 51-200 | Exact match | 78 contacts → |
“We are an SIA Approved Contractor, specializing in Manned Guarding and CCTV solutions.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Elite Security Service Providers LTDelite-ssp.co.uk HQ: Preston, United KingdomReported employees: 501-1,000 | Preston, United Kingdom | 501-1,000 | Exact match | 75 contacts → |
“ELITE SECURITY SERVICES PROVIDER LTD is a security and investigations company based at Lewth Stables, Lewth Lane, Woodplumpton, PR4 0TD United Kingdom.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Lead Element Security Groupleadelementsecurity.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 75 contacts → |
“We are Veteran Owned, Veteran Operated Security company based in London (HQ), with operation nationwide.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  United Guarding Services LTDunitedguarding.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 64 contacts → |
“United Guarding Services has been a trusted name in the security industry for over 30 years, providing high-performance security solutions for prestigious premises in London and…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Vigilance Certified B Corpvigilanceprotects.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 63 contacts → |
“Vigilance is a pioneering security company with a proud military heritage.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Sentinel Group Securitysgs-ltd.comHQ: Loughton, United KingdomReported employees: 201-500 | Loughton, United Kingdom | 201-500 | Exact match | 60 contacts → |
“Sentinel Group Security is a fast growing provider of all aspects of security personnel and manned security services operating across the United Kingdom.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Black Diamond Securityblackdiamondsecurity.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 58 contacts → |
“Black Diamond Security - Safeguarding Your World.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | SQR Group Security Solutions LTDsqrgroup.com HQ: Barnet, United KingdomReported employees: 501-1,000 | Barnet, United Kingdom | 501-1,000 | Exact match | 58 contacts → |
“In today’s advanced, interconnected world, protecting the infrastructure that allows society to function is crucial.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Shield Security Services LTDshieldsecurity.co.ukHQ: Aldershot, United KingdomReported employees: 51-200 | Aldershot, United Kingdom | 51-200 | Exact match | 53 contacts → |
“Shield Security Services Limited was incorporated in 1986.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Taybar Security LTDtaybar.co.ukHQ: Birmingham, United KingdomReported employees: 201-500 | Birmingham, United Kingdom | 201-500 | Exact match | 52 contacts → |
“Taybar Security are a leading security services provider, that support a variety of businesses with their specific needs.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 967 company matches
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Security investigation companies: dataset insights
September 29, 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
957 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 967 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 29, 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 ↗
Security investigation companies by metro
Questions about this company list
What does Exact match mean for security investigation companies?
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 security investigation companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 967 matching company records, 9,611 tracked contacts and 997 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 29, 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
Security investigation companies by geography
- Security investigation companies based in Melbourne, Australia
- Security investigation companies based in Sydney, Australia
- Security investigation companies based in Toronto, Canada
- Security investigation companies based in New Delhi, India
- Security investigation companies based in Birmingham, United Kingdom
- Security investigation companies based in London, United Kingdom
- Security investigation companies based in Atlanta, United States
- Security investigation companies based in Austin, United States
- Security investigation companies based in Chicago, United States
- Security investigation companies based in Denver, United States
- Security investigation companies based in Houston, United States
- Security investigation companies based in Las Vegas, United States
Cite this list
RevenueBase Data Team. Top 25 security investigation companies based in the United Kingdom. Snapshot: September 29, 2026. https://revenuebase.ai/companies/security-investigation-companies/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
- Security investigation companies based in Melbourne, Australia
- Security investigation companies based in Sydney, Australia
- Security investigation companies based in Toronto, Canada
- Security investigation companies based in New Delhi, India
- Security investigation companies based in Birmingham, United Kingdom
- Security investigation companies based in London, United Kingdom
Company intelligence · public preview
Top 25 security investigation companies based in the United Kingdom
RevenueBase records 967 matching company records for security investigation companies based in the United Kingdom, with 9,611 tracked contacts and 997 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 29, 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 security investigation companies 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 | Ward Securityward-security.co.uk HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 419 contacts → |
“Ward is an award winning, privately owned business, providing bespoke risk and security solutions including protective security personnel, explosive search dogs, narcotic search…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Bridgegate Security UK Limitedbridgegate-security.co.uk HQ: Leeds, United KingdomReported employees: 1,001-5,000 | Leeds, United Kingdom | 1,001-5,000 | Exact match | 180 contacts → |
“Established in 1978, Bridgegate Security is proud to be one of the UK’s largest independent security contractors.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Unitrust Protection Servicesunitrust.co.uk HQ: Middx, United KingdomReported employees: 201-500 | Middx, United Kingdom | 201-500 | Exact match | 175 contacts → |
“We are able to supply a one stop security service for all types of security requirement.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Trigion Security Services LTDtrigion.co.uk HQ: Sidcup, United KingdomReported employees: 201-500 | Sidcup, United Kingdom | 201-500 | Exact match | 166 contacts → |
“Trigion Security Services is the UK provider of Security Guarding and Technical Solutions for Facilicom UK.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | GET Licensedget-licensed.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 163 contacts → |
“Get Licensed is the UK's leading provider of security training, screening, and staffing solutions.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Elite Security Groupelitesecuritygroup.co.uk HQ: Swindon, United KingdomReported employees: 51-200 | Swindon, United Kingdom | 51-200 | Exact match | 162 contacts → |
“One of the largest independent security companies in the UK.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Corporate Research And Investigationscrigroup.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 140 contacts → |
“Corporate Research and Investigations Limited is a global provider of investigative research, background screening and business due diligence services for the world’s leading…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Vespasian Securityvespasiansecurity.co.uk HQ: Portsmouth, United KingdomReported employees: 201-500 | Portsmouth, United Kingdom | 201-500 | Exact match | 127 contacts → |
“Vespasian Security was formed in February 2006.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Kingdom Security Serviceskingdom.co.uk HQ: Newton-le-willows, United KingdomReported employees: 5,001-10,000 | Newton-le-willows, United Kingdom | 5,001-10,000 | Exact match | 126 contacts → |
“About Kingdom Security Established in March 1993, Kingdom Security is a leading UK security provider delivering professional, fully licensed security services nationwide.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | FACTfact-uk.org.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 117 contacts → |
“FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Guardforce Security Limitedguardforcesecurity.co.uk HQ: Hornchurch, United KingdomReported employees: 501-1,000 | Hornchurch, United Kingdom | 501-1,000 | Exact match | 111 contacts → |
“We are a well-established company that supplies specialist Close Protection, Door Supervisor services to Private Individuals, Visiting Royal Families, Government Officials…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Rossi Securityrossisecurity.co.uk HQ: Mayfair, United KingdomReported employees: 201-500 | Mayfair, United Kingdom | 201-500 | Exact match | 98 contacts → |
“Rossi Security have been providing Luxury Security services in London and Bicester Village, Oxfordshire since 2009.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Croma Security Solutions Group PLC Cssgcssgplc.com HQ: Whiteley, United KingdomReported employees: 501-1,000 | Whiteley, United Kingdom | 501-1,000 | Exact match | 87 contacts → |
“Croma Security Solutions Group (CSSG) began in 1970 as a family-run business in Shirley, Southampton, known as County Locksmiths.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Knight Protectionknightprotection.co.uk HQ: Camberley, United KingdomReported employees: 201-500 | Camberley, United Kingdom | 201-500 | Exact match | 81 contacts → |
“Knight Protection has nearly three decades’ experience providing bespoke protection and security solutions to private individuals, private estates, and corporate and public sector…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | T3 Securityt3security.co.uk HQ: Seaton Burn, United KingdomReported employees: 501-1,000 | Seaton Burn, United Kingdom | 501-1,000 | Exact match | 80 contacts → |
“T3 Security is a leading National Security Company supplying clients across the UK with bespoke security services.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | H&m Security Services Limitedhmsecurityservices.co.uk HQ: Woodford Green, United KingdomReported employees: 51-200 | Woodford Green, United Kingdom | 51-200 | Exact match | 78 contacts → |
“We are an SIA Approved Contractor, specializing in Manned Guarding and CCTV solutions.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Elite Security Service Providers LTDelite-ssp.co.uk HQ: Preston, United KingdomReported employees: 501-1,000 | Preston, United Kingdom | 501-1,000 | Exact match | 75 contacts → |
“ELITE SECURITY SERVICES PROVIDER LTD is a security and investigations company based at Lewth Stables, Lewth Lane, Woodplumpton, PR4 0TD United Kingdom.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Lead Element Security Groupleadelementsecurity.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 75 contacts → |
“We are Veteran Owned, Veteran Operated Security company based in London (HQ), with operation nationwide.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | United Guarding Services LTDunitedguarding.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 64 contacts → |
“United Guarding Services has been a trusted name in the security industry for over 30 years, providing high-performance security solutions for prestigious premises in London and…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Vigilance Certified B Corpvigilanceprotects.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 63 contacts → |
“Vigilance is a pioneering security company with a proud military heritage.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Sentinel Group Securitysgs-ltd.com HQ: Loughton, United KingdomReported employees: 201-500 | Loughton, United Kingdom | 201-500 | Exact match | 60 contacts → |
“Sentinel Group Security is a fast growing provider of all aspects of security personnel and manned security services operating across the United Kingdom.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Black Diamond Securityblackdiamondsecurity.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 58 contacts → |
“Black Diamond Security - Safeguarding Your World.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | SQR Group Security Solutions LTDsqrgroup.com HQ: Barnet, United KingdomReported employees: 501-1,000 | Barnet, United Kingdom | 501-1,000 | Exact match | 58 contacts → |
“In today’s advanced, interconnected world, protecting the infrastructure that allows society to function is crucial.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Shield Security Services LTDshieldsecurity.co.uk HQ: Aldershot, United KingdomReported employees: 51-200 | Aldershot, United Kingdom | 51-200 | Exact match | 53 contacts → |
“Shield Security Services Limited was incorporated in 1986.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Taybar Security LTDtaybar.co.uk HQ: Birmingham, United KingdomReported employees: 201-500 | Birmingham, United Kingdom | 201-500 | Exact match | 52 contacts → |
“Taybar Security are a leading security services provider, that support a variety of businesses with their specific needs.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 967 company matches
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Security investigation companies: dataset insights
September 29, 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
957 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 967 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 29, 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 ↗
Security investigation companies by metro
Questions about this company list
What does Exact match mean for security investigation companies?
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 security investigation companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 967 matching company records, 9,611 tracked contacts and 997 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 29, 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
Security investigation companies by geography
- Security investigation companies based in Melbourne, Australia
- Security investigation companies based in Sydney, Australia
- Security investigation companies based in Toronto, Canada
- Security investigation companies based in New Delhi, India
- Security investigation companies based in Birmingham, United Kingdom
- Security investigation companies based in London, United Kingdom
- Security investigation companies based in Atlanta, United States
- Security investigation companies based in Austin, United States
- Security investigation companies based in Chicago, United States
- Security investigation companies based in Denver, United States
- Security investigation companies based in Houston, United States
- Security investigation companies based in Las Vegas, United States
Cite this list
RevenueBase Data Team. Top 25 security investigation companies based in the United Kingdom. Snapshot: September 29, 2026. https://revenuebase.ai/companies/security-investigation-companies/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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