Company lists · Data refreshed September 2026
Top 24 Ics security companies based in the United Kingdom
RevenueBase identified 634 ics security companies headquartered in the United Kingdom as of September 2026 and tracks 13,375 professional contacts across them, including 5,060 with verified work emails and 1,731 with mobile numbers. London is the largest hub.
This list covers ics security companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 24 largest ics security companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 4,963 | ||||
“Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 304 | ||||
“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…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 200 | ||||
“OpenView Security Solutions is the UK’S largest privately owned independent security company and provides unique, innovative and technologically excellent solutions to meet…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 168 | ||||
“Exclusive Networks is a global trusted cybersecurity specialist for digital infrastructure helping to drive the transition to a totally trusted digital future for all people and…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 165 | ||||
“Sapphire delivers comprehensive cyber solutions tailored to your needs, spanning across consultancy, managed services, IT/OT and beyond.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 161 | ||||
“One of the largest independent security companies in the UK.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 160 | ||||
“At Cyberfort we are passionate about the cyber security services we deliver for our customers which keeps their people, data, systems and technology infrastructure secure…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 129 | ||||
“KHIPU Networks is an award winning international Cyber Security Company delivering a wide range of network, wireless and security solutions, technologies and services across…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 118 | ||||
“Bulletproof is now part of WorkNest Secure.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 87 | ||||
“ITC Secure is an advisory-led cyber security services company.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 80 | ||||
“At Reliance Cyber, we believe in truly partnering with our customers.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 69 | ||||
“With over 50 years’ experience in the security industry, Abel has grown to become one of the UK’s largest privately owned providers of electronic security systems.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 68 | ||||
“Modern cyber resilience demands more than isolated controls.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 63 | ||||
“Cyro Cyber are your cyber security Guardians.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 56 | ||||
“CyberLab is the UK-leading cyber security consultancy and managed services provider, trusted by over 1,200 enterprise businesses, government departments, and household names to…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 52 | ||||
“At Hexegic we are not just passionate about protecting data through our Cyber services we are passionate about helping companies release the potential of the data they hold…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | Adarma SecurityIndirect evidence | 52 | |||
“We are Adarma, independent leaders in detection and response services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 51 | ||||
“Established in Custom Intelligent Security is a technology driven ISO27001 & NSi Gold Accredited independent electronic security specialist with a proven track record of…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 46 | ||||
“Established in 2004 (acquired by Gamma in 2023), Satisnet, a Gamma company is a pedigree-proven cyber security services and solutions specialist with a fully UK-based 24x7x365 SOC.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 42 | ||||
“Mitigo Group keeps professional services firms safe from cyberattack and operationally resilient.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 38 | ||||
“Omerta - A Global Security Technology and Services Company.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | 36 | ||||
“The future of IoT/OT security is here.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | CyberisPartial evidence | 35 | |||
“Cyberis are pioneers in customer-focussed information security.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 35 | ||||
“Adaptive Cyber Security JUMPSEC operates on a core principle: real attack insight drives stronger defence.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 24 of 634 ics security companies based in the United Kingdom
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 5,060 reachable decision-makers.
Free signup · no credit card
Ics security companies based in the United Kingdom at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
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 ics 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 the United Kingdom whose own description of what they do matches “ics 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 ics security companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and 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, 5,060 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 3, 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.
Ics security companies by metro
- Ics security companies in London200
Frequently asked
How many ics security companies are there based in the United Kingdom?
RevenueBase identified 634 ics security companies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Sophos, headquartered in Abingdon, tops this list with the largest team on record.
Which city has the most ics security companies?
London leads with 200 headquartered companies, followed by Manchester (23) and Birmingham (14).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 5,060 verified decision-maker contacts tracked across these 634 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 2026.
Ready to reach these companies? Verified emails and direct dials for all 634 ics security companies based in the United Kingdom. Start with a free account, no credit card.
Get the full listRelated lists
Ics security companies by geography
- Ics security companies based in the United States
- Ics security companies based in Brazil
- Ics security companies based in France
- Ics security companies based in Canada
- Ics security companies based in Australia
- Ics security companies based in Germany
- Ics security companies based in Spain
- Ics security companies based in the Netherlands
- Ics security companies based in Italy
- Ics security companies based in Mexico
- Ics security companies based in South Africa
- Ics security companies based in Belgium
Browse the directory
Browse: Companies home · All United Kingdom lists · All Ics 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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Ics security companies based in the United States
- Ics security companies based in Brazil
- Ics security companies based in France
- Ics security companies based in Canada
- Ics security companies based in Australia
- Ics security companies based in Germany