Company lists · Data refreshed September 2026

Top 25 Multi-cloud security companies based in the United Kingdom

Name: Multi-cloud 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 5, 2026 198 companies tracked

RevenueBase identified 198 multi-cloud security companies headquartered in the United Kingdom as of September 2026 and tracks 10,837 professional contacts across them, including 5,815 with verified work emails and 1,536 with mobile numbers. London is the largest hub.

This list covers multi-cloud 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 5, 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 5, 2026 86% judged on-target in blind review

198Companies

10,837Contacts tracked

5,815Verified emails

1,536Mobile numbers

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The 25 largest multi-cloud security companies based in the United Kingdom

Ranked by team size

Top 25 of 198 multi-cloud security companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to multi-cloud 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 5, 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 5, 2026
2	Darktrace	Indirect evidence	Cambridge, United KingdomHQ checked Sep 5, 2026	1,001-5,000	2,355 contacts →
	Indirect evidence “Darktrace is a global leader in AI cybersecurity, providing the essential cybersecurity platform to secure organizations today and for an ever-changing future.” Source: RevenueBase Database · checked Sep 5, 2026
3	Securityhq	Partial evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
4	Iomart	Partial evidence	Glasgow, United KingdomHQ checked Sep 5, 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 5, 2026
5	Quorum Cyber	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 5, 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 5, 2026
6	Cyberfort	Partial evidence	Thatcham, United KingdomHQ checked Sep 5, 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 5, 2026
7	CSI LTD A CSI Group Company	Strong evidence	Birmingham, United KingdomHQ checked Sep 5, 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 5, 2026
8	Khipu Networks	Partial evidence	Fleet, United KingdomHQ checked Sep 5, 2026	51-200	125 contacts →
	Partial 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 5, 2026
9	Bulletproof Cyber Security	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	123 contacts →
	Indirect evidence “Bulletproof is now part of WorkNest Secure.” Source: RevenueBase Database · checked Sep 5, 2026
10	Telesoft	Indirect evidence	Blandford, United KingdomHQ checked Sep 5, 2026	51-200	68 contacts →
	Indirect evidence “The organisations that run our world face relentless complexity and evolving threats.” Source: RevenueBase Database · checked Sep 5, 2026
11	Eset UK	Indirect evidence	Bournemouth, United KingdomHQ checked Sep 5, 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 5, 2026
12	Garrison NOW A Part Of Everfox	Indirect evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
13	Senseon	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	54 contacts →
	Indirect evidence “SenseOn deploys alongside all of your existing tools, unifying them into a single investigation plane and augmenting your team with cross-domain correlation, analytics, and…” Source: RevenueBase Database · checked Sep 5, 2026
14	Adarma Security	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 5, 2026	201-500	51 contacts →
	Indirect evidence “We are Adarma, independent leaders in detection and response services.” Source: RevenueBase Database · checked Sep 5, 2026
15	Eticloud	Indirect evidence	Sheffield, United KingdomHQ checked Sep 5, 2026	51-200	46 contacts →
	Indirect evidence “Get to know etiCloud - Delivering tomorrow's technology, today.” Source: RevenueBase Database · checked Sep 5, 2026
16	Coretech Security	Partial evidence	Cheltenham, United KingdomHQ checked Sep 5, 2026	51-200	42 contacts →
	Partial 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 5, 2026
17	Cybaverse	Partial evidence	Portsmouth, United KingdomHQ checked Sep 5, 2026	51-200	41 contacts →
	Partial 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 5, 2026
18	Dece Software	Strong evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	35 contacts →
	Strong evidence “Intelligent data security platform that unifies Discovery, Classification, Remediation, and Workflow Automation, across Cloud & On-Prem, Structured & Unstructured data.” Source: RevenueBase Database · checked Sep 5, 2026
19	defense.com	Partial evidence	Stevenage, United KingdomHQ checked Sep 5, 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 5, 2026
20	Flow Global Solutions	Partial evidence	Hemel Hempstead, United KingdomHQ checked Sep 5, 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 5, 2026
21	Intrinsic Security	Strong evidence	Peterborough, United KingdomHQ checked Sep 5, 2026	51-200	32 contacts →
	Strong 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 5, 2026
22	Encode	Partial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	25 contacts →
	Partial evidence “Encode is now part of Obrela Security Industries collectively delivering cutting edge Cyber Security Services, empowering organizations to better protect against cyber threats.” Source: RevenueBase Database · checked Sep 5, 2026
23	Vambrace Cybersecurity	Indirect evidence	Leeds, United KingdomHQ checked Sep 5, 2026	11-50	24 contacts →
	Indirect evidence “Whatever you supply, design, build, manufacture, or grow, its excelling at it that has got your business to where it is today.” Source: RevenueBase Database · checked Sep 5, 2026
24	Nanjgel Solutions	Partial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	24 contacts →
	Partial evidence “Nanjgel Solutions is focused on delivering the best IT security for businesses.” Source: RevenueBase Database · checked Sep 5, 2026
25	4secure LTD	Indirect evidence	Northampton, United KingdomHQ checked Sep 5, 2026	11-50	23 contacts →
	Indirect 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 5, 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: multi-cloud 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 multi-cloud security companies.
Partial evidence: Its own public description names part of multi-cloud security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name multi-cloud 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 198 multi-cloud security companies based in the United Kingdom

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Multi-cloud security companies based in the United Kingdom at a glance

As of Sep 5, 2026

53.7%Verified-email coverage

14.2%Mobile-number coverage

54.7Average contacts per company

11-50Median size (employees)

39.4%Largest-city concentration · London

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

5,3170–30

37431–60

261–90

190–180

121180+

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 multi-cloud 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 “multi-cloud 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 multi-cloud 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 multi-cloud 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, 5,815 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 5, 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.

Multi-cloud security companies by metro

Multi-cloud security companies in London78

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 multi-cloud 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 multi-cloud security companies are there based in the United Kingdom?

RevenueBase identified 198 multi-cloud 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 multi-cloud security companies?

London leads with 78 headquartered companies, followed by Manchester (7) and Birmingham (4).

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 5,815 verified decision-maker contacts tracked across these 198 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 5, 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.