Company lists · Data refreshed September 2026
Top 10 Security companies based in Cardiff, United Kingdom
This directory lists 35 security companies based in Cardiff, United Kingdom, with 342 contacts and 108 email addresses for business research and outreach. As of September 2026, London is the single most-represented city among the companies on the list.
Security companies provide services, systems, or products that protect people, property, facilities, data, networks, or other assets from security threats. This list covers companies that provide security products or services, including physical security, cybersecurity, monitoring, access control, risk management, and related protection solutions. Ranked by team size, largest first. Data current as of September 6, 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 10 largest security companies based in Cardiff, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 90 | ||||
“Formed in 2003 DVS has quickly established itself as one of Europe’s most successful multi-brand distributors of electronic surveillance and Fire products and Europe's Largest…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | Oprema LTDStrong evidence | 69 | |||
“We are the fastest growing UK security distributor of CCTV, Access Control, Intruder and Fire products.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | Overt Security LTDIndirect evidence | 28 | |||
“Established in 2018 and situated in the heart of Cardiff.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | Specialist Security CO LTDStrong evidence | 23 | |||
“Specialist Security Co Ltd is an independently owned business established over two decades ago.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | SGD GroupStrong evidence | 14 | |||
“SGD Group of Companies are National Security Inspectorate Gold standard accredited.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Site Guardian Group LTDIndirect evidence | 6 | |||
“Site Guardian designs and installs temporary Construction Site CCTV, Visually Verified Construction Site Alarms, and Scaffold Alarms on a weekly hire basis.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | One2c LTDStrong evidence | 6 | |||
“One2C Limited is a privately owned company providing a wide range of cost efficient tailored security solutions including CCTV systems throughout the U.K, designed specifically…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | Fast Fire & Security TechnologiesStrong evidence | 5 | |||
“With over 40 years Fire & Security industry experience, FAST has been created with you the customer in mind.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | Innovative Fire & SecurityIndirect evidence | 4 | |||
“A customer service driven company, we provide the best in Fire Alarm Systems, Intruder Alarm Systems, CCTV, Access Control, Intercoms, Emergency Voice Communication Systems…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | JDS Fire And Security Soultions LimitedIndirect evidence | 3 | |||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 10 of 35 security companies based in Cardiff, United Kingdom
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 108 reachable decision-makers.
Free signup · no credit card
Security companies based in Cardiff, United Kingdom at a glance
As of Sep 6, 2026Companies by employee count
Email recency for this list is measured across the whole United Kingdom list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Cardiff, over 35 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among security companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Cardiff, United Kingdom whose own description of what they do matches “security companies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among security companies, and records with no verified work email. Companies headquartered outside Cardiff are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 108 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 6, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Security companies by metro in the United Kingdom
- Security companies in London909
- Security companies in Manchester122
- Security companies in Birmingham108
- Security companies in Glasgow64
- Security companies in Leeds64
- Security companies in Bristol60
- Security companies in Liverpool48
- Security companies in Leicester37
- Security companies in Cardiff35
- Security companies in Belfast33
- Security companies in Nottingham33
- Security companies in Sheffield32
- Security companies in Ilford30
- Security companies in Southampton30
- Security companies in Luton29
- Security companies in Bradford27
- Security companies in Northampton25
Frequently asked
How many security companies are based in Cardiff, United Kingdom?
RevenueBase counts 35 security companies based in Cardiff, United Kingdom on this list.
How many contacts and email addresses are available for security companies?
The list includes 342 contacts and 108 email addresses for security companies.
Which city has the most security companies on the list?
London is the single most-represented city among the companies on the list.
Ready to reach these companies? Verified emails and direct dials for all 35 security companies based in Cardiff, United Kingdom. Start with a free account, no credit card.
Get the full listRelated lists
Security companies by geography
- Security companies based in the United States
- Security companies based in the United Kingdom
- Security companies based in Brazil
- Security companies based in France
- Security companies based in Canada
- Security companies based in Germany
- Security companies based in Italy
- Security companies based in Australia
- Security companies based in the Netherlands
- Security companies based in Mexico
- Security companies based in South Africa
- Security companies based in Spain
Browse the directory
Browse: Companies home · Security companies in United Kingdom · All United Kingdom lists · All Security companies lists · New lists
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.