Company lists · Data refreshed November 2026
Top 25 Critical infrastructure security integrators based in the United Kingdom
RevenueBase identified 212 company matches for critical infrastructure security integrators associated with the United Kingdom as of November 2026 and tracks 5,319 professional contacts across them, including 2,234 with verified work emails. London is the largest hub.
This list covers company matches for critical infrastructure security integrators 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 November 5, 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 critical infrastructure security integrators based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 389 contacts → | ||||
Exact match “Trinity’s mission statement is simple - to provide high quality design, installation, commissioning and long term after care of Fire Detection, Fire Suppression, Life Safety and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 2 | 352 contacts → | ||||
Exact match “Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 3 | 327 contacts → | ||||
Exact match “Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 4 | 203 contacts → | ||||
Exact match “OpenView Security Solutions is the UK’S largest privately owned independent security company and provides unique, innovative and technologically excellent solutions to meet…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 5 | 169 contacts → | ||||
Exact match “Pointer Limited We are a Specialist Fire and Security Services Integrator.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 6 | 167 contacts → | ||||
Exact match “Ovarro's technology is used throughout the world to monitor, control and manage water and critical infrastructure.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 7 | 149 contacts → | ||||
Exact match “Frontline Security Solutions is a global electronic security integrator specialising in Access Control, CCTV, Intruder and Intercom systems that protect people, property and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 8 | 115 contacts → | ||||
Exact match “European Electronique is a leading UK systems Integrator, specialising in the delivery of secure technology platforms including Hybrid IT, Cyber Security and Networking…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 9 | 103 contacts → | ||||
Exact match “Optilan is a leading independent security and communications systems integrator worldwide.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 10 | 102 contacts → | ||||
Exact match “Better protect your people, places and spaces.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 11 | 74 contacts → | ||||
Exact match “RHI Industrials provide Physical and Electronic Security Solutions to the UK's major utility companies and partners: Critical National Infrastructure Facilities, Electricity…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 12 | 67 contacts → | ||||
Exact match “Black Diamond Security - Safeguarding Your World.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 13 | 66 contacts → | ||||
Exact match “McAndrew Martin Ltd are a secure and accredited infrastructure solutions provider to Government, Defence and Critical National Infrastructure.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 14 | 63 contacts → | ||||
Exact match “CyberOwl helps asset operators in the maritime and critical national infrastructure sectors gain visibility, cyber security and cyber compliance of systems on their distributed…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 15 | 60 contacts → | ||||
Exact match “At Alphatrack Systems Ltd, we don’t just install equipment-we engineer integrated solutions that deliver safety, compliance, and ultimate peace of mind.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 16 | 50 contacts → | ||||
Exact match “Electranet’s mission is to be a preferred partner to the public and private sectors, bringing competitively priced, secure and innovative solutions to the market.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 17 | 46 contacts → | ||||
Exact match “Since 1987 Optyma Integrated Security Systems have been successfully delivering complex integrated security projects using the latest technology.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 18 | 44 contacts → | ||||
Exact match “Core Controls, part of Ipsum Group, are pioneers in the integration, control and automation of complex infrastructure.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 19 | 44 contacts → | ||||
Exact match “Established since 1994, Crime and Fire delivers state-of-the-art cost-effective security solutions, to the highest quality and safety standards.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 20 | 42 contacts → | ||||
Exact match “Gratte Brothers is an experienced provider of integrated security solutions, which are Built on Strong Values and ultimately deliver a measurable return on investment.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 21 | 42 contacts → | ||||
Exact match “We specialise in delivering and maintaining integrated security systems for leading companies in the UK and across Europe, Middle East & Africa.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 22 | 42 contacts → | ||||
Exact match “Alton Valley delivers secure IT, infrastructure, managed services and physical security solutions for organisations operating in complex and high-security environments.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 23 | 37 contacts → | ||||
Exact match “Servelec Controls develops and integrates bespoke mission-critical systems for national infrastructure by bringing together specialist hardware, software and world-class…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 24 | 34 contacts → | ||||
Exact match “We are your strategic cybersecurity partner – going beyond traditional models to deliver agile, expert-led protection tailored to the needs of regulated industries and critical…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 25 | 34 contacts → | ||||
Exact match “At Kore Systems, we’re with you every step of the way.” Recorded in the RevenueBase company graph · Nov 5, 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 “critical infrastructure security integrators”. 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 212 critical infrastructure security integrators based in the United Kingdom
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Critical infrastructure security integrators based in the United Kingdom at a glance
As of Nov 5, 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 212 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 “critical infrastructure security integrators” 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 2,234 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 November 5, 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.
Critical infrastructure security integrators 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 “critical infrastructure security integrators”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many critical infrastructure security integrators are there based in the United Kingdom?
RevenueBase identified 212 company matches for critical infrastructure security integrators associated with the United Kingdom as of November 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?
Trinity Fire & Security Systems tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most critical infrastructure security integrators?
London leads with 63 company records, followed by Nottingham (8) and Derby (4).
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 2,234 professional contacts with verified work emails tracked across these 212 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 November 5, 2026.
Ready to reach these companies? Verified emails and direct dials for all 212 critical infrastructure security integrators based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Critical infrastructure security integrators by geography
- Critical infrastructure security integrators based in Sao Paulo, Brazil
- Critical infrastructure security integrators based in Bangalore, India
- Critical infrastructure security integrators based in Warsaw, Poland
- Critical infrastructure security integrators based in Riyadh, Saudi Arabia
- Critical infrastructure security integrators based in Dubai, United Arab Emirates
- Critical infrastructure security integrators based in London, United Kingdom
- Critical infrastructure security integrators based in Houston, United States
- Critical infrastructure security integrators based in New York, United States
- Critical infrastructure security integrators based in Argentina
- Critical infrastructure security integrators based in Australia
- Critical infrastructure security integrators based in Belgium
- Critical infrastructure security integrators based in Brazil
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
- Critical infrastructure security integrators based in Sao Paulo, Brazil
- Critical infrastructure security integrators based in Bangalore, India
- Critical infrastructure security integrators based in Warsaw, Poland
- Critical infrastructure security integrators based in Riyadh, Saudi Arabia
- Critical infrastructure security integrators based in Dubai, United Arab Emirates
- Critical infrastructure security integrators based in London, United Kingdom
Company intelligence · public preview
Top 25 critical infrastructure security integrators 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 212 matching company records for critical infrastructure security integrators based in the United Kingdom, with 5,319 tracked contacts and 2,234 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: November 5, 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 critical infrastructure security integrators 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 |  Trinity Fire & Security Systemstrinityfireandsecurity.comHQ: Exeter, United KingdomReported employees: 501-1,000 | Exeter, United Kingdom | 501-1,000 | Exact match | 389 contacts → |
“Trinity’s mission statement is simple - to provide high quality design, installation, commissioning and long term after care of Fire Detection, Fire Suppression, Life Safety and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Kings Secure Technologieskingsltd.co.ukHQ: Bradford, United KingdomReported employees: 501-1,000 | Bradford, United Kingdom | 501-1,000 | Exact match | 352 contacts → |
“Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Bridewellbridewell.comHQ: Reading, United KingdomReported employees: 201-500 | Reading, United Kingdom | 201-500 | Exact match | 327 contacts → |
“Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Openview Security Solutions Limitedopenviewgroup.comHQ: Romford, United KingdomReported employees: 201-500 | Romford, United Kingdom | 201-500 | Exact match | 203 contacts → |
“OpenView Security Solutions is the UK’S largest privately owned independent security company and provides unique, innovative and technologically excellent solutions to meet…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Pointer LTDpointer.co.ukHQ: Glasgow, United KingdomReported employees: 51-200 | Glasgow, United Kingdom | 51-200 | Exact match | 169 contacts → |
“Pointer Limited We are a Specialist Fire and Security Services Integrator.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Ovarroovarro.comHQ: Sheffield, United KingdomReported employees: 201-500 | Sheffield, United Kingdom | 201-500 | Exact match | 167 contacts → |
“Ovarro's technology is used throughout the world to monitor, control and manage water and critical infrastructure.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Frontline Security Solutionsfrontlinefs.comHQ: Chalfont St Peter, United KingdomReported employees: 51-200 | Chalfont St Peter, United Kingdom | 51-200 | Exact match | 149 contacts → |
“Frontline Security Solutions is a global electronic security integrator specialising in Access Control, CCTV, Intruder and Intercom systems that protect people, property and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  European Electroniqueeuroele.comHQ: Eynsham, United KingdomReported employees: 51-200 | Eynsham, United Kingdom | 51-200 | Exact match | 115 contacts → |
“European Electronique is a leading UK systems Integrator, specialising in the delivery of secure technology platforms including Hybrid IT, Cyber Security and Networking…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Optilanoptilan.comHQ: Royal Leamington Spa, United KingdomReported employees: 201-500 | Royal Leamington Spa, United Kingdom | 201-500 | Exact match | 103 contacts → |
“Optilan is a leading independent security and communications systems integrator worldwide.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Total Integrated Solutions TIS LTDtis.co.ukHQ: Mansfield, United KingdomReported employees: 51-200 | Mansfield, United Kingdom | 51-200 | Exact match | 102 contacts → |
“Better protect your people, places and spaces.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  RHI Industrials LTDrhi-industrials.co.ukHQ: Matfen, United KingdomReported employees: 51-200 | Matfen, United Kingdom | 51-200 | Exact match | 74 contacts → |
“RHI Industrials provide Physical and Electronic Security Solutions to the UK's major utility companies and partners: Critical National Infrastructure Facilities, Electricity…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Black Diamond Securityblackdiamondsecurity.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 67 contacts → |
“Black Diamond Security - Safeguarding Your World.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Mcandrew Martin LTDmcandrewmartin.comHQ: Portsmouth, United KingdomReported employees: 51-200 | Portsmouth, United Kingdom | 51-200 | Exact match | 66 contacts → |
“McAndrew Martin Ltd are a secure and accredited infrastructure solutions provider to Government, Defence and Critical National Infrastructure.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Cyberowlcyberowl.ioHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 63 contacts → |
“CyberOwl helps asset operators in the maritime and critical national infrastructure sectors gain visibility, cyber security and cyber compliance of systems on their distributed…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Alphatrack Systemsalphatracksystems.co.ukHQ: Harlow, United KingdomReported employees: 201-500 | Harlow, United Kingdom | 201-500 | Exact match | 60 contacts → |
“At Alphatrack Systems Ltd, we don’t just install equipment-we engineer integrated solutions that deliver safety, compliance, and ultimate peace of mind.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Electranet UK Limitedelectranetuk.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 50 contacts → |
“Electranet’s mission is to be a preferred partner to the public and private sectors, bringing competitively priced, secure and innovative solutions to the market.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Optyma Security Systems LTDoptyma.co.ukHQ: Bexleyheath, United KingdomReported employees: 51-200 | Bexleyheath, United Kingdom | 51-200 | Exact match | 46 contacts → |
“Since 1987 Optyma Integrated Security Systems have been successfully delivering complex integrated security projects using the latest technology.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Core Controls LTDcorecontrols.co.ukHQ: Ilkeston, United KingdomReported employees: 11-50 | Ilkeston, United Kingdom | 11-50 | Exact match | 44 contacts → |
“Core Controls, part of Ipsum Group, are pioneers in the integration, control and automation of complex infrastructure.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Crime And Fire Defence Systems LTDcrimeandfire.comHQ: Wakefield, United KingdomReported employees: 11-50 | Wakefield, United Kingdom | 11-50 | Exact match | 44 contacts → |
“Established since 1994, Crime and Fire delivers state-of-the-art cost-effective security solutions, to the highest quality and safety standards.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 42 contacts → |
“Gratte Brothers is an experienced provider of integrated security solutions, which are Built on Strong Values and ultimately deliver a measurable return on investment.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Inspired Integrated Systems LTDinspiredsystems.co.ukHQ: Welwyn Garden City, United KingdomReported employees: 51-200 | Welwyn Garden City, United Kingdom | 51-200 | Exact match | 42 contacts → |
“We specialise in delivering and maintaining integrated security systems for leading companies in the UK and across Europe, Middle East & Africa.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Alton Valleyaltonvalley.comHQ: Derby, United KingdomReported employees: 51-200 | Derby, United Kingdom | 51-200 | Exact match | 42 contacts → |
“Alton Valley delivers secure IT, infrastructure, managed services and physical security solutions for organisations operating in complex and high-security environments.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Servelec Controlsserveleccontrols.comHQ: Sheffield, United KingdomReported employees: 51-200 | Sheffield, United Kingdom | 51-200 | Exact match | 37 contacts → |
“Servelec Controls develops and integrates bespoke mission-critical systems for national infrastructure by bringing together specialist hardware, software and world-class…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Barrier Networksbarriernetworks.comHQ: Glasgow, United KingdomReported employees: 11-50 | Glasgow, United Kingdom | 11-50 | Exact match | 34 contacts → |
“We are your strategic cybersecurity partner – going beyond traditional models to deliver agile, expert-led protection tailored to the needs of regulated industries and critical…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Kore Systems LTDkoresystems.comHQ: Isleworth, United KingdomReported employees: 11-50 | Isleworth, United Kingdom | 11-50 | Exact match | 34 contacts → |
“At Kore Systems, we’re with you every step of the way.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 212 company matches
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Critical infrastructure security integrators: dataset insights
November 5, 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
208 records in the displayed employee bands.
4 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 212 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: November 5, 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 ↗
Critical infrastructure security integrators by metro
Questions about this company list
What does Exact match mean for critical infrastructure security integrators?
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 critical infrastructure security integrators did RevenueBase find based in the United Kingdom?
The saved snapshot records 212 matching company records, 5,319 tracked contacts and 2,234 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: November 5, 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
Critical infrastructure security integrators by geography
- Critical infrastructure security integrators based in Sao Paulo, Brazil
- Critical infrastructure security integrators based in Bangalore, India
- Critical infrastructure security integrators based in Warsaw, Poland
- Critical infrastructure security integrators based in Riyadh, Saudi Arabia
- Critical infrastructure security integrators based in Dubai, United Arab Emirates
- Critical infrastructure security integrators based in London, United Kingdom
- Critical infrastructure security integrators based in Houston, United States
- Critical infrastructure security integrators based in New York, United States
- Critical infrastructure security integrators based in Argentina
- Critical infrastructure security integrators based in Australia
- Critical infrastructure security integrators based in Belgium
- Critical infrastructure security integrators based in Brazil
Cite this list
RevenueBase Data Team. Top 25 critical infrastructure security integrators based in the United Kingdom. Snapshot: November 5, 2026. https://revenuebase.ai/companies/critical-infrastructure-security-integrators/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
- Critical infrastructure security integrators based in Sao Paulo, Brazil
- Critical infrastructure security integrators based in Bangalore, India
- Critical infrastructure security integrators based in Warsaw, Poland
- Critical infrastructure security integrators based in Riyadh, Saudi Arabia
- Critical infrastructure security integrators based in Dubai, United Arab Emirates
- Critical infrastructure security integrators based in London, United Kingdom
Company intelligence · public preview
Top 25 critical infrastructure security integrators based in the United Kingdom
RevenueBase records 212 matching company records for critical infrastructure security integrators based in the United Kingdom, with 5,319 tracked contacts and 2,234 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: November 5, 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 critical infrastructure security integrators 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 | Trinity Fire & Security Systemstrinityfireandsecurity.com HQ: Exeter, United KingdomReported employees: 501-1,000 | Exeter, United Kingdom | 501-1,000 | Exact match | 389 contacts → |
“Trinity’s mission statement is simple - to provide high quality design, installation, commissioning and long term after care of Fire Detection, Fire Suppression, Life Safety and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Kings Secure Technologieskingsltd.co.uk HQ: Bradford, United KingdomReported employees: 501-1,000 | Bradford, United Kingdom | 501-1,000 | Exact match | 352 contacts → |
“Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Bridewellbridewell.com HQ: Reading, United KingdomReported employees: 201-500 | Reading, United Kingdom | 201-500 | Exact match | 327 contacts → |
“Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Openview Security Solutions Limitedopenviewgroup.com HQ: Romford, United KingdomReported employees: 201-500 | Romford, United Kingdom | 201-500 | Exact match | 203 contacts → |
“OpenView Security Solutions is the UK’S largest privately owned independent security company and provides unique, innovative and technologically excellent solutions to meet…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Pointer LTDpointer.co.uk HQ: Glasgow, United KingdomReported employees: 51-200 | Glasgow, United Kingdom | 51-200 | Exact match | 169 contacts → |
“Pointer Limited We are a Specialist Fire and Security Services Integrator.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Ovarroovarro.com HQ: Sheffield, United KingdomReported employees: 201-500 | Sheffield, United Kingdom | 201-500 | Exact match | 167 contacts → |
“Ovarro's technology is used throughout the world to monitor, control and manage water and critical infrastructure.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Frontline Security Solutionsfrontlinefs.com HQ: Chalfont St Peter, United KingdomReported employees: 51-200 | Chalfont St Peter, United Kingdom | 51-200 | Exact match | 149 contacts → |
“Frontline Security Solutions is a global electronic security integrator specialising in Access Control, CCTV, Intruder and Intercom systems that protect people, property and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | European Electroniqueeuroele.com HQ: Eynsham, United KingdomReported employees: 51-200 | Eynsham, United Kingdom | 51-200 | Exact match | 115 contacts → |
“European Electronique is a leading UK systems Integrator, specialising in the delivery of secure technology platforms including Hybrid IT, Cyber Security and Networking…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Optilanoptilan.com HQ: Royal Leamington Spa, United KingdomReported employees: 201-500 | Royal Leamington Spa, United Kingdom | 201-500 | Exact match | 103 contacts → |
“Optilan is a leading independent security and communications systems integrator worldwide.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Total Integrated Solutions TIS LTDtis.co.uk HQ: Mansfield, United KingdomReported employees: 51-200 | Mansfield, United Kingdom | 51-200 | Exact match | 102 contacts → |
“Better protect your people, places and spaces.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | RHI Industrials LTDrhi-industrials.co.uk HQ: Matfen, United KingdomReported employees: 51-200 | Matfen, United Kingdom | 51-200 | Exact match | 74 contacts → |
“RHI Industrials provide Physical and Electronic Security Solutions to the UK's major utility companies and partners: Critical National Infrastructure Facilities, Electricity…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Black Diamond Securityblackdiamondsecurity.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 67 contacts → |
“Black Diamond Security - Safeguarding Your World.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Mcandrew Martin LTDmcandrewmartin.com HQ: Portsmouth, United KingdomReported employees: 51-200 | Portsmouth, United Kingdom | 51-200 | Exact match | 66 contacts → |
“McAndrew Martin Ltd are a secure and accredited infrastructure solutions provider to Government, Defence and Critical National Infrastructure.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Cyberowlcyberowl.io HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 63 contacts → |
“CyberOwl helps asset operators in the maritime and critical national infrastructure sectors gain visibility, cyber security and cyber compliance of systems on their distributed…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Alphatrack Systemsalphatracksystems.co.uk HQ: Harlow, United KingdomReported employees: 201-500 | Harlow, United Kingdom | 201-500 | Exact match | 60 contacts → |
“At Alphatrack Systems Ltd, we don’t just install equipment-we engineer integrated solutions that deliver safety, compliance, and ultimate peace of mind.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Electranet UK Limitedelectranetuk.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 50 contacts → |
“Electranet’s mission is to be a preferred partner to the public and private sectors, bringing competitively priced, secure and innovative solutions to the market.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Optyma Security Systems LTDoptyma.co.uk HQ: Bexleyheath, United KingdomReported employees: 51-200 | Bexleyheath, United Kingdom | 51-200 | Exact match | 46 contacts → |
“Since 1987 Optyma Integrated Security Systems have been successfully delivering complex integrated security projects using the latest technology.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Core Controls LTDcorecontrols.co.uk HQ: Ilkeston, United KingdomReported employees: 11-50 | Ilkeston, United Kingdom | 11-50 | Exact match | 44 contacts → |
“Core Controls, part of Ipsum Group, are pioneers in the integration, control and automation of complex infrastructure.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Crime And Fire Defence Systems LTDcrimeandfire.com HQ: Wakefield, United KingdomReported employees: 11-50 | Wakefield, United Kingdom | 11-50 | Exact match | 44 contacts → |
“Established since 1994, Crime and Fire delivers state-of-the-art cost-effective security solutions, to the highest quality and safety standards.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 42 contacts → |
“Gratte Brothers is an experienced provider of integrated security solutions, which are Built on Strong Values and ultimately deliver a measurable return on investment.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Inspired Integrated Systems LTDinspiredsystems.co.uk HQ: Welwyn Garden City, United KingdomReported employees: 51-200 | Welwyn Garden City, United Kingdom | 51-200 | Exact match | 42 contacts → |
“We specialise in delivering and maintaining integrated security systems for leading companies in the UK and across Europe, Middle East & Africa.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Alton Valleyaltonvalley.com HQ: Derby, United KingdomReported employees: 51-200 | Derby, United Kingdom | 51-200 | Exact match | 42 contacts → |
“Alton Valley delivers secure IT, infrastructure, managed services and physical security solutions for organisations operating in complex and high-security environments.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Servelec Controlsserveleccontrols.com HQ: Sheffield, United KingdomReported employees: 51-200 | Sheffield, United Kingdom | 51-200 | Exact match | 37 contacts → |
“Servelec Controls develops and integrates bespoke mission-critical systems for national infrastructure by bringing together specialist hardware, software and world-class…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Barrier Networksbarriernetworks.com HQ: Glasgow, United KingdomReported employees: 11-50 | Glasgow, United Kingdom | 11-50 | Exact match | 34 contacts → |
“We are your strategic cybersecurity partner – going beyond traditional models to deliver agile, expert-led protection tailored to the needs of regulated industries and critical…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Kore Systems LTDkoresystems.com HQ: Isleworth, United KingdomReported employees: 11-50 | Isleworth, United Kingdom | 11-50 | Exact match | 34 contacts → |
“At Kore Systems, we’re with you every step of the way.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 212 company matches
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Critical infrastructure security integrators: dataset insights
November 5, 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
208 records in the displayed employee bands.
4 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 212 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: November 5, 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 ↗
Critical infrastructure security integrators by metro
Questions about this company list
What does Exact match mean for critical infrastructure security integrators?
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 critical infrastructure security integrators did RevenueBase find based in the United Kingdom?
The saved snapshot records 212 matching company records, 5,319 tracked contacts and 2,234 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: November 5, 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
Critical infrastructure security integrators by geography
- Critical infrastructure security integrators based in Sao Paulo, Brazil
- Critical infrastructure security integrators based in Bangalore, India
- Critical infrastructure security integrators based in Warsaw, Poland
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- Critical infrastructure security integrators based in Dubai, United Arab Emirates
- Critical infrastructure security integrators based in London, United Kingdom
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- Critical infrastructure security integrators based in New York, United States
- Critical infrastructure security integrators based in Argentina
- Critical infrastructure security integrators based in Australia
- Critical infrastructure security integrators based in Belgium
- Critical infrastructure security integrators based in Brazil
Cite this list
RevenueBase Data Team. Top 25 critical infrastructure security integrators based in the United Kingdom. Snapshot: November 5, 2026. https://revenuebase.ai/companies/critical-infrastructure-security-integrators/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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