Company lists · Data refreshed September 2026

Top 25 Industrial cybersecurity software companies based in the United Kingdom

Name: Industrial cybersecurity software companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 136 companies tracked

RevenueBase identified 136 industrial cybersecurity software companies headquartered in the United Kingdom as of September 2026 and tracks 2,166 professional contacts across them, including 1,088 with verified work emails. London is the largest hub.

This list covers industrial cybersecurity software 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

136Companies

2,166Contacts tracked

1,088Verified emails

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The 25 largest industrial cybersecurity software companies based in the United Kingdom

Ranked by team size

Top 25 of 136 industrial cybersecurity software companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to industrial cybersecurity software companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Bridewell	Indirect evidence	Reading, United KingdomHQ checked Sep 28, 2026	201-500	303 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
2	Quorum Cyber	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 28, 2026	201-500	297 contacts →
	Indirect evidence “At Quorum Cyber, we're on a mission to help good people win.” Source: RevenueBase Database · checked Sep 28, 2026
3	Performanta	Partial evidence	Maidenhead, United KingdomHQ checked Sep 28, 2026	51-200	156 contacts →
	Partial evidence “Performanta is a global cybersecurity and data risk management company dedicated to protecting people where data matters most.” Source: RevenueBase Database · checked Sep 28, 2026
4	RED Sift	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	109 contacts →
	Indirect evidence “Red Sift enables organizations to anticipate, respond to, and recover from cyber attacks while continuing to operate effectively.” Source: RevenueBase Database · checked Sep 28, 2026
5	Titania LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	88 contacts →
	Indirect evidence “Dedicated to securing the networks society depends on.” Source: RevenueBase Database · checked Sep 28, 2026
6	Cybersmart	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	84 contacts →
	Partial evidence “Cybersecurity should be simple.” Source: RevenueBase Database · checked Sep 28, 2026
7	Eset UK	Indirect evidence	Bournemouth, United KingdomHQ checked Sep 28, 2026	51-200	66 contacts →
	Indirect evidence “We help businesses and individuals stay protected in an increasingly complex digital world.” Source: RevenueBase Database · checked Sep 28, 2026
8	Cyberowl	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	52 contacts →
	Indirect evidence “CyberOwl helps asset operators in the maritime and critical national infrastructure sectors gain visibility, cyber security and cyber compliance of systems on their distributed…” Source: RevenueBase Database · checked Sep 28, 2026
9	Cyberq Group	Partial evidence	Birmingham, United KingdomHQ checked Sep 28, 2026	51-200	42 contacts →
	Partial evidence “CyberQ Group is an award-winning, venture-backed, and globally accredited [ISO27K and CREST] cybersecurity leader dedicated to bridging the "protection gap" for high-stakes…” Source: RevenueBase Database · checked Sep 28, 2026
10	Cybaverse	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 28, 2026	51-200	41 contacts →
	Indirect evidence “We are on a mission to simplify and scale cyber security by combining AI, automation, expert-led services, in a unified platform: giving every organisation, from MSPs to global…” Source: RevenueBase Database · checked Sep 28, 2026
11	Remsdaq LTD	Partial evidence	Deeside, United KingdomHQ checked Sep 28, 2026	51-200	39 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
12	Nothreat	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	36 contacts →
	Indirect evidence “The future of IoT/OT security is here.” Source: RevenueBase Database · checked Sep 28, 2026
13	Barrier Networks	Strong evidence	Glasgow, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 28, 2026
14	Razorsecure	Indirect evidence	Basingstoke, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Indirect evidence “RazorSecure offers products and services to enhance railway cyber security by protecting networks and monitoring key systems.” Source: RevenueBase Database · checked Sep 28, 2026
15	defense.com	Indirect evidence	Stevenage, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Indirect evidence “Defense.com is transforming the way businesses manage cyber security by allowing them to easily identify, prioritise and remediate threats.” Source: RevenueBase Database · checked Sep 28, 2026
16	Device Authority	Indirect evidence	Reading, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Indirect evidence “Device Authority enables end to end cyber resilience for connected devices through the discovery, visibility and automated security of large IoT/OT deployments.” Source: RevenueBase Database · checked Sep 28, 2026
17	Intrinsic Security	Partial evidence	Peterborough, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Partial evidence “Intrinsic Security is a UK-headquartered cybersecurity firm delivering 24/7 threat detection, incident response, and resilience across cloud, hybrid, OT, IoT, and identity…” Source: RevenueBase Database · checked Sep 28, 2026
18	Tekgem	Indirect evidence	Sedgefield, United KingdomHQ checked Sep 28, 2026	11-50	26 contacts →
	Indirect evidence “Tekgem bridges the gap between Information Technology (IT) and Operational Technology (OT).” Source: RevenueBase Database · checked Sep 28, 2026
19	Cyberwhiz IOT Cyber Security	Indirect evidence	Cheltenham, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Indirect evidence “At CyberWhiz, we build next-generation IoT Cyber Security solutions across the three pillars of IoT, which are Edge·Mobile·Cloud.” Source: RevenueBase Database · checked Sep 28, 2026
20	4secure LTD	Strong evidence	Northampton, United KingdomHQ checked Sep 28, 2026	11-50	23 contacts →
	Strong evidence “4Secure is a trusted provider of software defined, cross-network/cross-domain cybersecurity solutions for commercial, government and defence.” Source: RevenueBase Database · checked Sep 28, 2026
21	Cyber Energia	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
22	Clearswift	Indirect evidence	Berkshire, United KingdomHQ checked Sep 28, 2026	201-500	19 contacts →
	Indirect evidence “Why Clearswift?” Source: RevenueBase Database · checked Sep 28, 2026
23	Trustify LTD	Strong evidence	Edinburgh, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Strong evidence “Trustify is a Cybersecurity software vendor based in Edinburgh, Scotland.” Source: RevenueBase Database · checked Sep 28, 2026
24	Infosec K2k	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	18 contacts →
	Partial evidence “Infosec K2K safeguards your organisation’s most valuable assets with tailored cybersecurity solutions.” Source: RevenueBase Database · checked Sep 28, 2026
25	Cyberrey	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “Your Trusted Distribution & Security Solutions in Building and Securing Your Digital Ecosystem Cyberrey is a leading distributor of comprehensive cybersecurity solutions…” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: industrial cybersecurity software companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names industrial cybersecurity software companies.
Partial evidence: Its own public description names part of industrial cybersecurity software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial cybersecurity software companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 136 industrial cybersecurity software companies based in the United Kingdom

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Industrial cybersecurity software companies based in the United Kingdom at a glance

As of Sep 28, 2026

50.2%Verified-email coverage

15.9Average contacts per company

11-50Median size (employees)

46.3%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 136 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 industrial cybersecurity software companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “industrial cybersecurity software companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names industrial cybersecurity software companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among industrial cybersecurity software 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 its RevenueBase Smart Search 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, 1,088 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 28, 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.

Industrial cybersecurity software companies by metro

Industrial cybersecurity software companies in London63

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names industrial cybersecurity software companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many industrial cybersecurity software companies are there based in the United Kingdom?

RevenueBase identified 136 industrial cybersecurity software 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 industrial cybersecurity software companies?

London leads with 63 headquartered companies, followed by Reading (5) and Edinburgh (3).

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 1,088 verified decision-maker contacts tracked across these 136 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 28, 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 Smart Search, 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.