Company lists · Data refreshed September 2026

Top 25 IT security governance companies based in the United Kingdom

Name: IT security governance 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 620 companies tracked

RevenueBase identified 620 IT security governance companies headquartered in the United Kingdom as of September 2026 and tracks 5,604 professional contacts across them, including 2,050 with verified work emails. London is the largest hub.

This list covers IT security governance 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

620Companies

5,604Contacts tracked

2,050Verified emails

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The 25 largest IT security governance companies based in the United Kingdom

Ranked by team size

Top 25 of 620 IT security governance 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 IT security governance 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	COBRA	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	705 contacts →
	Strong evidence “Get a free, powerful security assessment with personalised recommendations, the same analysis that costs from IT Consultancies.” Source: RevenueBase Database · checked Sep 28, 2026
2	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
3	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
4	LOGIQ	Partial evidence	Bradley Stoke, United KingdomHQ checked Sep 28, 2026	201-500	143 contacts →
	Partial evidence “Logiq is a UK-based cyber security consultancy and secure managed services provider supporting defence, government, and critical national infrastructure (CNI) organisations where…” Source: RevenueBase Database · checked Sep 28, 2026
5	Turnkey Consulting	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	134 contacts →
	Partial evidence “Turnkey Consulting brings together people, protection, and performance to help the world’s leading companies understand and optimize their risk and security landscape.” Source: RevenueBase Database · checked Sep 28, 2026
6	Trpglobal	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	126 contacts →
	Indirect evidence “We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Source: RevenueBase Database · checked Sep 28, 2026
7	Bulletproof Cyber Security	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	123 contacts →
	Indirect evidence “Bulletproof is now part of WorkNest Secure.” Source: RevenueBase Database · checked Sep 28, 2026
8	Tiaa LTD	Indirect evidence	Fareham, United KingdomHQ checked Sep 28, 2026	51-200	117 contacts →
	Indirect evidence “Relax.” Source: RevenueBase Database · checked Sep 28, 2026
9	Information Security Forum	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	103 contacts →
	Partial evidence “Founded in 1989, the Information Security Forum (ISF) is an independent organisation that is driven by its Members – ranging from Fortune 500 and Forbes listed corporations, to…” Source: RevenueBase Database · checked Sep 28, 2026
10	Cognisys	Partial evidence	Leeds, United KingdomHQ checked Sep 28, 2026	51-200	90 contacts →
	Partial evidence “Solutions \| Testing \| Knowledge Helping You Protect Your Business From Cyber Attackers Your security and compliance partner, delivering trust worldwide Cognisys are your trusted…” Source: RevenueBase Database · checked Sep 28, 2026
11	Amethyst Risk Management	Indirect evidence	Basingstoke, United KingdomHQ checked Sep 28, 2026	11-50	85 contacts →
	Indirect evidence “Amethyst Risk Management is a leading cybersecurity consultancy supplying expert services and support to the UK Government, Defence, Operators of Essential Services, and the…” Source: RevenueBase Database · checked Sep 28, 2026
12	URM	Partial evidence	Reading, United KingdomHQ checked Sep 28, 2026	51-200	81 contacts →
	Partial evidence “Established in 2005, URM Consulting is a specialist provider of cyber and information security consultancy, training, and assurance services.” 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	Dionach By Nomios	Partial evidence	Oxford, United KingdomHQ checked Sep 28, 2026	51-200	73 contacts →
	Partial evidence “Dionach by Nomios has over 25 years of expertise in information security, supporting organisations in building resilience against ever‑evolving cyber threats.” Source: RevenueBase Database · checked Sep 28, 2026
15	CSA Cyber	Indirect evidence	Gloucester, United KingdomHQ checked Sep 28, 2026	51-200	69 contacts →
	Indirect evidence “Modern cyber resilience demands more than isolated controls.” Source: RevenueBase Database · checked Sep 28, 2026
16	Normcyber	Partial evidence	Fareham, United KingdomHQ checked Sep 28, 2026	51-200	64 contacts →
	Partial evidence “Established in 2015, NormCyber is a multi-award-winning cyber security specialist, on a mission to provide organisations with complete visibility and total control over cyber risk.” Source: RevenueBase Database · checked Sep 28, 2026
17	Evalian	Indirect evidence	Southampton, United KingdomHQ checked Sep 28, 2026	51-200	60 contacts →
	Indirect evidence “Many organisations are dealing with multiple frameworks, overlapping tools, disconnected ownership, and increasing pressure from regulators, customers, and boards.” Source: RevenueBase Database · checked Sep 28, 2026
18	Cyberlab	Partial evidence	Alderley Edge, United KingdomHQ checked Sep 28, 2026	51-200	57 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
19	IT Governance LTD	Strong evidence	Ely, United KingdomHQ checked Sep 28, 2026	201-500	50 contacts →
	Strong evidence “IT Governance is a leading global provider of IT governance, risk management, penetration testing and compliance solutions, with a special focus on cyber resilience, data…” Source: RevenueBase Database · checked Sep 28, 2026
20	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
21	Secarma LTD	Indirect evidence	Manchester, United KingdomHQ checked Sep 28, 2026	11-50	36 contacts →
	Indirect evidence “Secarma exists to keep the world safe.” Source: RevenueBase Database · checked Sep 28, 2026
22	GRC International Group	Strong evidence	Ely, United KingdomHQ checked Sep 28, 2026	51-200	35 contacts →
	Strong evidence “GRC International Group plc is the holding company for a group of companies providing a range of products and services to address the IT governance, risk management and compliance…” Source: RevenueBase Database · checked Sep 28, 2026
23	Torrid Networks Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Partial evidence “Founded in 2006, Torrid Networks has been able to establish strong credentials in the area of cyber security products, research, consulting, managed services, education and staff…” Source: RevenueBase Database · checked Sep 28, 2026
24	Omnicyber Security	Strong evidence	Solihull, United KingdomHQ checked Sep 28, 2026	11-50	31 contacts →
	Strong evidence “SPECIALISTS IN IT SECURITY AND COMPLIANCE Our goal is to help customers define, develop and implement information security and compliance services, no matter what stage of the…” Source: RevenueBase Database · checked Sep 28, 2026
25	Corbel Solutions LTD	Partial evidence	Ipswich, United KingdomHQ checked Sep 28, 2026	51-200	31 contacts →
	Partial evidence “Corbel Solutions are a dedicated team of IT experts who pride themselves on customer care, commitment and unrivalled levels of service!” 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: IT security governance 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 IT security governance companies.
Partial evidence: Its own public description names part of IT security governance companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT security governance 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 620 IT security governance companies based in the United Kingdom

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IT security governance companies based in the United Kingdom at a glance

As of Sep 28, 2026

36.6%Verified-email coverage

9.0Average contacts per company

1-10Median size (employees)

39.2%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

403

11-50

163

51-200

201-500

501-1,000

1,001-5,000

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 620 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 IT security governance 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 “IT security governance 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 IT security governance 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 IT security governance 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, 2,050 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.

IT security governance companies by metro

IT security governance companies in London243

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 IT security governance 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 IT security governance companies are there based in the United Kingdom?

RevenueBase identified 620 IT security governance 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?

COBRA, headquartered in London, tops this list with the largest team on record.

Which city has the most IT security governance companies?

London leads with 243 headquartered companies, followed by Manchester (16) and Reading (12).

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 2,050 verified decision-maker contacts tracked across these 620 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.