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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 6, 2026 86% judged on-target in blind review
71Companies
802Contacts tracked
404Verified emails
42Mobile numbers
Explore all 71 companies → Free signup · no credit card · 500 free credits

The 25 largest scada security companies based in the United Kingdom

Ranked by team size
Top 25 of 71 scada security companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 6, 2026. Evidence rates how directly each company's own description names scada security companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
BridewellPartial evidence
Reading, United KingdomHQ checked Sep 6, 2026201-500303

“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, 2026
2
Reliance CyberIndirect evidence
Waterloo, United KingdomHQ checked Sep 6, 202651-20080

“At Reliance Cyber, we believe in truly partnering with our customers.”

Source: company website · checked Sep 6, 2026
3
Remsdaq LTDPartial evidence
Deeside, United KingdomHQ checked Sep 6, 202651-20039

“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, 2026
4
Barrier NetworksIndirect evidence
Glasgow, United KingdomHQ checked Sep 6, 202611-5034

“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, 2026
5
TekgemIndirect evidence
Sedgefield, United KingdomHQ checked Sep 6, 202611-5026

“Tekgem bridges the gap between Information Technology (IT) and Operational Technology (OT).”

Source: company website · checked Sep 6, 2026
6
Sword IacsPartial evidence
Aberdeen, United KingdomHQ checked Sep 6, 202611-5022

“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, 2026
7
Blue Cube Security LTDPartial evidence
East Grinstead, United KingdomHQ checked Sep 6, 202611-5022

“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, 2026
8
Cyber EnergiaStrong evidence
London, United KingdomHQ checked Sep 6, 202611-5020

“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, 2026
9
SinevisIndirect evidence
London, United KingdomHQ checked Sep 6, 202611-5017

“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, 2026
10
Socguardians LTDIndirect evidence
London, United KingdomHQ checked Sep 6, 202611-5013

“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, 2026
11
Disclosure CybersecurityPartial evidence
London, United KingdomHQ checked Sep 6, 202611-5011

“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, 2026
12
OtifydIndirect evidence
London, United KingdomHQ checked Sep 6, 202611-5011

“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, 2026
13
ExalensIndirect evidence
London, United KingdomHQ checked Sep 6, 202611-5010

“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, 2026
14
IcyberdefencePartial evidence
London, United KingdomHQ checked Sep 6, 202611-508

“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, 2026
15Birmingham, United KingdomHQ checked Sep 6, 20261-108

“Cyber security is a subcategory of information security – specifically focusing on protecting computer systems and their components.”

Source: company website · checked Sep 6, 2026
16
Threat ProtectIndirect evidence
London, United KingdomHQ checked Sep 6, 20261-107

“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, 2026
17
Tactile TechnologyPartial evidence
Birmingham, United KingdomHQ checked Sep 6, 20261-106

“Tactile Technology is a leading provider of comprehensive physical and cyber security services.”

Source: company website · checked Sep 6, 2026
18
Secure DebugIndirect evidence
Cranfield, United KingdomHQ checked Sep 6, 202611-506

“Secure Debug: Your Full-Spectrum Cybersecurity Guardian!”

Source: company website · checked Sep 6, 2026
19East Kilbride, United KingdomHQ checked Sep 6, 202611-505

“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, 2026
20
Gcssystems LimitedPartial evidence
Richmond, United KingdomHQ checked Sep 6, 202651-2005

“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, 2026
21
Rexel CybersecurityIndirect evidence
London, United KingdomHQ checked Sep 6, 202611-505

“At Rexel Cyber we help businesses fight the constant threat of cyber attack and data breach.”

Source: company website · checked Sep 6, 2026
22
KeysigmaIndirect evidence
Cheltenham, United KingdomHQ checked Sep 6, 20261-104

“At KEYSIGMA, we understand that protecting your business-critical data and systems is non-negotiable.”

Source: company website · checked Sep 6, 2026
23
CyberniticsPartial evidence
Glasgow, United KingdomHQ checked Sep 6, 20261-104

“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, 2026
24
Kit365Indirect evidence
Leicester, United KingdomHQ checked Sep 6, 20261-104

“KIT365 is a cybersecurity company based in the city of Leicester.”

Source: company website · checked Sep 6, 2026
25
Trinity OT SecurityPartial evidence
London, United KingdomHQ checked Sep 6, 20261-103

“Trinity OT Security specialises in cybersecurity solutions, system integration and professional services for Operational Technology (OT) environments.”

Source: company website · checked Sep 6, 2026

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, 2026
1-10Median size (employees)
LondonLargest hub · 29 HQs
42Contacts with mobile numbers
Sep 6, 2026Data refreshed

Companies by employee count

1-10
39
11-50
24
51-200
4
201-500
3
501-1,000
1

Verified emails by last verification

0–30
380
31–60
22
61–90
0
90–180
0
180+
2

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.