Company lists · Data refreshed September 2026

Top 25 Industrial network security companies based in the United Kingdom

Name: Industrial network security 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 261 companies tracked

RevenueBase identified 261 industrial network security companies headquartered in the United Kingdom as of September 2026 and tracks 9,945 professional contacts across them, including 4,805 with verified work emails. London is the largest hub.

This list covers industrial network 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, 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

261Companies

9,945Contacts tracked

4,805Verified emails

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The 25 largest industrial network security companies based in the United Kingdom

Ranked by team size

Top 25 of 261 industrial network security 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 network security 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	Sophos	Indirect evidence	Abingdon, United KingdomHQ checked Sep 28, 2026	5,001-10,000	4,925 contacts →
	Indirect evidence “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: RevenueBase Database · checked Sep 28, 2026
2	Securityhq	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	502 contacts →
	Partial evidence “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: RevenueBase Database · checked Sep 28, 2026
3	Bridewell	Partial evidence	Reading, United KingdomHQ checked Sep 28, 2026	201-500	303 contacts →
	Partial 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
4	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
5	Obrela	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	242 contacts →
	Strong evidence “Obrela Security Industries is a global provider of cyber security services.” Source: RevenueBase Database · checked Sep 28, 2026
6	Sapphire	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 28, 2026	51-200	168 contacts →
	Indirect evidence “Sapphire delivers comprehensive cyber solutions tailored to your needs, spanning across consultancy, managed services, IT/OT and beyond.” Source: RevenueBase Database · checked Sep 28, 2026
7	Exclusive Networks UK	Partial evidence	Alton, United KingdomHQ checked Sep 28, 2026	201-500	165 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
8	Ovarro	Indirect evidence	Sheffield, United KingdomHQ checked Sep 28, 2026	201-500	165 contacts →
	Indirect evidence “Ovarro's technology is used throughout the world to monitor, control and manage critical and national infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
9	Cyberfort	Partial evidence	Thatcham, United KingdomHQ checked Sep 28, 2026	51-200	159 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
10	Khipu Networks	Strong evidence	Fleet, United KingdomHQ checked Sep 28, 2026	51-200	125 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 28, 2026
11	Conosco	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	105 contacts →
	Indirect evidence “Cybersecurity specialists providing technology and telecoms solutions that gives you the leadership, experience and resilience you need to build and secure the future of work.” Source: RevenueBase Database · checked Sep 28, 2026
12	Titania LTD	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	88 contacts →
	Strong evidence “Dedicated to securing the networks society depends on.” Source: RevenueBase Database · checked Sep 28, 2026
13	Reliance Cyber	Indirect evidence	Waterloo, United KingdomHQ checked Sep 28, 2026	51-200	80 contacts →
	Indirect evidence “At Reliance Cyber, we believe in truly partnering with our customers.” Source: RevenueBase Database · checked Sep 28, 2026
14	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
15	Cyberowl	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	52 contacts →
	Partial 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
16	Adarma Security	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 28, 2026	201-500	51 contacts →
	Indirect evidence “We are Adarma, independent leaders in detection and response services.” Source: RevenueBase Database · checked Sep 28, 2026
17	Satisnet, A Gamma Company	Partial evidence	Luton, United KingdomHQ checked Sep 28, 2026	51-200	45 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
18	Remsdaq LTD	Indirect evidence	Deeside, United KingdomHQ checked Sep 28, 2026	51-200	39 contacts →
	Indirect 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
19	Omerta	Partial evidence	Saffron Walden, United KingdomHQ checked Sep 28, 2026	51-200	38 contacts →
	Partial evidence “Omerta - A Global Security Technology and Services Company.” Source: RevenueBase Database · checked Sep 28, 2026
20	Nothreat	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	36 contacts →
	Partial evidence “The future of IoT/OT security is here.” Source: RevenueBase Database · checked Sep 28, 2026
21	Barrier Networks	Partial evidence	Glasgow, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Partial 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
22	Cyberis	Partial evidence	Tewkesbury, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Partial evidence “Cyberis are pioneers in customer-focussed information security.” Source: RevenueBase Database · checked Sep 28, 2026
23	Razorsecure	Strong evidence	Basingstoke, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Strong 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
24	defense.com	Partial evidence	Stevenage, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Partial 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
25	Device Authority	Partial evidence	Reading, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Partial 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

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 network security 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 network security companies.
Partial evidence: Its own public description names part of industrial network security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial network security 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 261 industrial network security companies based in the United Kingdom

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Industrial network security companies based in the United Kingdom at a glance

As of Sep 28, 2026

48.3%Verified-email coverage

38.1Average contacts per company

11-50Median size (employees)

41.0%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

117

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 261 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 network security 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 network security 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 network security 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 network 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 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, 4,805 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 network security companies by metro

Industrial network security companies in London107

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 network security 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 network security companies are there based in the United Kingdom?

RevenueBase identified 261 industrial network 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 industrial network security companies?

London leads with 107 headquartered companies, followed by Manchester (8) and Aberdeen (5).

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 4,805 verified decision-maker contacts tracked across these 261 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.