Company lists · Data refreshed September 2026
Top 25 Scada security companies based in the United Kingdom
RevenueBase identified 71 scada security companies headquartered in the United Kingdom as of September 2026 and tracks 802 professional contacts across them, including 404 with verified work emails and 42 with mobile numbers. London is the largest hub.
This list covers scada 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 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 25 largest scada security companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 303 | ||||
“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 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 80 | ||||
“At Reliance Cyber, we believe in truly partnering with our customers.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | Remsdaq LTDPartial evidence | 39 | |||
“Remsdaq Ltd, is a UK-based hardware and software system engineering company supplying off-the-shelf and turnkey solutions for SCADA (sub-station EHV/HV/MV/LV monitoring)…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 34 | ||||
“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…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 26 | ||||
“Tekgem bridges the gap between Information Technology (IT) and Operational Technology (OT).” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 22 | ||||
“IACS Consulting are an Aberdeen based Industrial Automation Control System consultancy that specialises exclusively in cyber security for the production and safety critical…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 22 | ||||
“Blue Cube Security is a trusted UK cyber security partner with over 25 years of experience helping organisations stay secure in an increasingly complex digital world.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | Cyber EnergiaStrong evidence | 20 | |||
“Cyber Energia – Your Comprehensive Cyber Security Solution for a smart & sustainable energy market Cyber Energia is a dynamic managed security service provider offering OT / SCADA…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 17 | ||||
“We are a leading cybersecurity services organization with more than a decade of proven expertise in consulting, solution implementation and managed services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 13 | ||||
“Our mission at SOCGuardians is to empower organizations to operate confidently in a digital world by providing cutting-edge cybersecurity services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 11 | ||||
“Disclosure Cybersecurity Ltd is a specialist cyber security company, formed by professionals with extensive experience and wide exposure in the cyber security market.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 11 | ||||
“We are a next-gen Operational Technology (OT) cybersecurity leader focused on safeguarding industrial environments so that we can fulfil our purpose: Provide best-in-class OT…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 10 | ||||
“Exalens unifies device and process monitoring to autonomously learn every detail of how your industrial systems and processes work.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 8 | ||||
“iCyberDefence is a boutique cybersecurity services firm that offers a wide range of security consulting and security engineering services with the necessary products and tools.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 8 | ||||
“Cyber security is a subcategory of information security – specifically focusing on protecting computer systems and their components.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 7 | ||||
“Threat Protect is a vendor-agnostic cybersecurity, compliance and AI governance partner based in London, working with organisations across finance, legal, energy, pharma…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 6 | ||||
“Tactile Technology is a leading provider of comprehensive physical and cyber security services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | 6 | ||||
“Secure Debug: Your Full-Spectrum Cybersecurity Guardian!” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 5 | ||||
“Since founded on the 1st April 2005, new members of staff have joined the team, each with a vast wealth of knowledge and experience, making Cal-Tech the best in the industry.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | Gcssystems LimitedPartial evidence | 5 | |||
“Key Capabilities • 24/7 SIEM (Security Information and Event Management) • Virtual Helpdesk • SOC (Security Operations Center) • Robust Penetration Testing • Threat Intelligence…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 5 | ||||
“At Rexel Cyber we help businesses fight the constant threat of cyber attack and data breach.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 4 | ||||
“At KEYSIGMA, we understand that protecting your business-critical data and systems is non-negotiable.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 4 | ||||
“We are a leading cybersecurity company dedicated to protecting your digital assets and ensuring the utmost security for your organization.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 | ||||
“KIT365 is a cybersecurity company based in the city of Leicester.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | Trinity OT SecurityPartial evidence | 3 | |||
“Trinity OT Security specialises in cybersecurity solutions, system integration and professional services for Operational Technology (OT) environments.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 71 scada security companies based in the United Kingdom
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Scada security companies based in the United Kingdom at a glance
As of Sep 6, 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 scada 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 “scada 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 scada 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, 404 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.
Scada security companies by metro
- Scada security companies in London29
Frequently asked
How many scada security companies are there based in the United Kingdom?
RevenueBase identified 71 scada 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?
Bridewell, headquartered in Reading, tops this list with the largest team on record.
Which city has the most scada security companies?
London leads with 29 headquartered companies, followed by Aberdeen (2) and Birmingham (2).
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 404 verified decision-maker contacts tracked across these 71 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 6, 2026.
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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.
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