Company lists · Data refreshed September 2026

Top 25 Cloud infrastructure protection companies based in the United Kingdom

Name: Cloud infrastructure protection 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 27, 2026 323 companies tracked

RevenueBase identified 323 cloud infrastructure protection companies headquartered in the United Kingdom as of September 2026 and tracks 10,004 professional contacts across them, including 4,582 with verified work emails. London is the largest hub.

This list covers cloud infrastructure protection 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 27, 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 27, 2026 86% judged on-target in blind review

323Companies

10,004Contacts tracked

4,582Verified emails

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The 25 largest cloud infrastructure protection companies based in the United Kingdom

Ranked by team size

Top 25 of 323 cloud infrastructure protection companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to cloud infrastructure protection 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 27, 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 27, 2026
2	Iomart	Partial evidence	Glasgow, United KingdomHQ checked Sep 27, 2026	201-500	414 contacts →
	Partial evidence “Iomart combines cutting-edge cloud technology with deep industry expertise to help organisations transform with confidence.” Source: RevenueBase Database · checked Sep 27, 2026
3	Bridewell	Partial evidence	Reading, United KingdomHQ checked Sep 27, 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 27, 2026
4	Quorum Cyber	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 27, 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 27, 2026
5	Cyberfort	Partial evidence	Thatcham, United KingdomHQ checked Sep 27, 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 27, 2026
6	Performanta	Partial evidence	Maidenhead, United KingdomHQ checked Sep 27, 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 27, 2026
7	CSI LTD A CSI Group Company	Strong evidence	Birmingham, United KingdomHQ checked Sep 27, 2026	201-500	135 contacts →
	Strong evidence “CSI, A Park Place Technologies Company, is an IT Managed Services Provider bringing world-class Hybrid Multi-Cloud, Data Protection, and Cyber Security solutions to our clients’…” Source: RevenueBase Database · checked Sep 27, 2026
8	Khipu Networks	Indirect evidence	Fleet, United KingdomHQ checked Sep 27, 2026	51-200	125 contacts →
	Indirect 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 27, 2026
9	Bulletproof Cyber Security	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	123 contacts →
	Indirect evidence “Bulletproof is now part of WorkNest Secure.” Source: RevenueBase Database · checked Sep 27, 2026
10	RED Sift	Indirect evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
11	Cybersmart	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	84 contacts →
	Indirect evidence “Cybersecurity should be simple.” Source: RevenueBase Database · checked Sep 27, 2026
12	Virtual IT LTD	Partial evidence	South & West Hampstead, United KingdomHQ checked Sep 27, 2026	51-200	79 contacts →
	Partial evidence “Virtual IT are a leading provider of cyber-secure cloud and managed IT services in the UK, entrusted by over 700 businesses and schools as their end-to-end technology partner.” Source: RevenueBase Database · checked Sep 27, 2026
13	Brightsolid	Partial evidence	Dundee, United KingdomHQ checked Sep 27, 2026	51-200	76 contacts →
	Partial evidence “Brightsolid is expert in all things colocation, cloud and cyber security.” Source: RevenueBase Database · checked Sep 27, 2026
14	Eset UK	Indirect evidence	Bournemouth, United KingdomHQ checked Sep 27, 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 27, 2026
15	Threatspike	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	61 contacts →
	Indirect evidence “ThreatSpike is the world's first AI-managed IT and security platform, replacing the legacy MSP model entirely.” Source: RevenueBase Database · checked Sep 27, 2026
16	Garrison NOW A Part Of Everfox	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	60 contacts →
	Indirect evidence “Garrison is a London-based cybersecurity company founded in 2014 by David Garfield (CEO) and Henry Harrison (Chief Scientist).” Source: RevenueBase Database · checked Sep 27, 2026
17	Coretech Security	Indirect evidence	Cheltenham, United KingdomHQ checked Sep 27, 2026	51-200	42 contacts →
	Indirect evidence “CoreTech is a specialist cyber security company whose people are motivated by the desire to deliver exceptional capabilities coupled with a real sense of mission.” Source: RevenueBase Database · checked Sep 27, 2026
18	Cybaverse	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 27, 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 27, 2026
19	Online Support	Partial evidence	Brentford, United KingdomHQ checked Sep 27, 2026	11-50	39 contacts →
	Partial evidence “For over 20 years, we’ve helped businesses stay productive, secure and resilient through reliable IT support, modern cloud solutions and cyber security services designed for…” Source: RevenueBase Database · checked Sep 27, 2026
20	Secarma LTD	Indirect evidence	Manchester, United KingdomHQ checked Sep 27, 2026	11-50	36 contacts →
	Indirect evidence “Secarma exists to keep the world safe.” Source: RevenueBase Database · checked Sep 27, 2026
21	Genie9	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	36 contacts →
	Strong evidence “At Genie9, we redefine data protection for homes and businesses with smart, secure, and scalable cloud storage solutions.” Source: RevenueBase Database · checked Sep 27, 2026
22	Flow Global Solutions	Partial evidence	Hemel Hempstead, United KingdomHQ checked Sep 27, 2026	11-50	32 contacts →
	Partial evidence “Our expert team provide secure datacentre, network and cloud native solutions as well as industry leading managed services.” Source: RevenueBase Database · checked Sep 27, 2026
23	Intrinsic Security	Partial evidence	Peterborough, United KingdomHQ checked Sep 27, 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 27, 2026
24	Acumen Cyber	Indirect evidence	Glasgow, United KingdomHQ checked Sep 27, 2026	11-50	31 contacts →
	Indirect evidence “At Acumen, our purpose is clear: we protect modern businesses from the complexities of cyber threats 24/7.” Source: RevenueBase Database · checked Sep 27, 2026
25	Precursor Security	Partial evidence	Leeds, United KingdomHQ checked Sep 27, 2026	11-50	31 contacts →
	Partial evidence “A UK based organisation protecting organisations from cyber attacks with our CREST certified 24x7 UK SOC and offensive security services.” Source: RevenueBase Database · checked Sep 27, 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: cloud infrastructure protection 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 cloud infrastructure protection companies.
Partial evidence: Its own public description names part of cloud infrastructure protection companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cloud infrastructure protection 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 323 cloud infrastructure protection companies based in the United Kingdom

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Cloud infrastructure protection companies based in the United Kingdom at a glance

As of Sep 27, 2026

45.8%Verified-email coverage

31.0Average contacts per company

11-50Median size (employees)

39.6%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

157

11-50

119

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 323 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 cloud infrastructure protection 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 “cloud infrastructure protection 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 cloud infrastructure protection 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 cloud infrastructure protection 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, 4,582 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 27, 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.

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 cloud infrastructure protection 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 cloud infrastructure protection companies are there based in the United Kingdom?

RevenueBase identified 323 cloud infrastructure protection 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 cloud infrastructure protection companies?

London leads with 128 headquartered companies, followed by Manchester (10) and Birmingham (6).

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 4,582 verified decision-maker contacts tracked across these 323 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 27, 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.