Company lists · Data refreshed August 2026

Top 25 Cloud security management companies based in the United Kingdom

Name: Cloud security management companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 287 companies tracked

RevenueBase identified 287 cloud security management companies headquartered in the United Kingdom as of August 2026 and tracks 9,763 professional contacts across them, including 4,906 with verified work emails and 1,460 with mobile numbers. London is the largest hub.

This list covers cloud security management 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 August 31, 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 RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

287Companies

9,763Contacts tracked

4,906Verified emails

1,460Mobile numbers

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The 25 largest cloud security management companies based in the United Kingdom

Ranked by team size

Top 25 of 287 cloud security management companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to cloud security management 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 Kingdom	5,001-10,000	4,963 contacts →
	Indirect evidence “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: RevenueBase Database · checked Aug 31, 2026
2	Netwrix Corporation	Indirect evidence	London, United Kingdom	501-1,000	799 contacts →
	Indirect evidence “Netwrix secures the foundation of modern business: data and identity.” Source: RevenueBase Database · checked Aug 31, 2026
3	Devoteam Google Cloud Partner	Partial evidence	London, United Kingdom	501-1,000	546 contacts →
	Partial evidence “Devoteam is a Diamond Tier Partner in the Google Cloud Services Partner Path and a Managed Services Provider.” Source: RevenueBase Database · checked Aug 31, 2026
4	Iomart	Partial evidence	Glasgow, United Kingdom	201-500	422 contacts →
	Partial evidence “Iomart combines cutting-edge cloud technology with deep industry expertise to help organisations transform with confidence.” Source: RevenueBase Database · checked Aug 31, 2026
5	Obsidian Security	Partial evidence	Cheltenham, United Kingdom	51-200	234 contacts →
	Partial evidence “Protect your business-critical applications by mitigating threats and reducing risk with Obsidian, the first truly comprehensive security solution for SaaS.” Source: RevenueBase Database · checked Aug 31, 2026
6	Cloud Direct	Partial evidence	United Kingdom	51-200	168 contacts →
	Partial evidence “Cloud Direct is a leading Microsoft Partner that helps organisations realise the true value of artificial intelligence and position themselves as Agent-Ready Enterprises.” Source: RevenueBase Database · checked Aug 31, 2026
7	CSI LTD A CSI Group Company	Strong evidence	London, United Kingdom	201-500	161 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 Aug 31, 2026
8	Cyberfort	Partial evidence	Thatcham, United Kingdom	51-200	160 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 Aug 31, 2026
9	Bulletproof Cyber Security	Indirect evidence	London, United Kingdom	51-200	118 contacts →
	Indirect evidence “Bulletproof is now part of WorkNest Secure.” Source: RevenueBase Database · checked Aug 31, 2026
10	Virtual IT LTD	Partial evidence	Laindon, United Kingdom	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 Aug 31, 2026
11	Instant On IT	Strong evidence	London, United Kingdom	51-200	69 contacts →
	Strong evidence “Helping businesses accomplish more IT Management, Strategy and Cloud, IT Security and AI Solutions Office locations: Central London, New Zealand” Source: RevenueBase Database · checked Aug 31, 2026
12	Cloudrise	Strong evidence	London, United Kingdom	51-200	69 contacts →
	Strong evidence “Cloudrise, an Exclusive Networks company, is your go-to team for world-class data, network, and cloud security services.” Source: RevenueBase Database · checked Aug 31, 2026
13	Tuliptech	Strong evidence	Leicester, United Kingdom	51-200	68 contacts →
	Strong evidence “TulipTech drives progress through unmatched Cloud Migration & Management capabilities, DevOps, NetOps, and SecOps.” Source: RevenueBase Database · checked Aug 31, 2026
14	Telesoft	Indirect evidence	Blandford, United Kingdom	51-200	68 contacts →
	Indirect evidence “The organisations that run our world face relentless complexity and evolving threats.” Source: RevenueBase Database · checked Aug 31, 2026
15	Cogeco Peer 1	Indirect evidence	Southampton, United Kingdom	501-1,000	67 contacts →
	Indirect evidence “Cogeco Peer 1 has changed its name to Aptum Technologies.” Source: RevenueBase Database · checked Aug 31, 2026
16	Surveil	Partial evidence	East Horsley, United Kingdom	51-200	61 contacts →
	Partial evidence “Surveil is a FinOps-certified cloud intelligence platform helping enterprises govern, optimize, and plan cloud investments across Microsoft and multi-cloud environments.” Source: RevenueBase Database · checked Aug 31, 2026
17	Iland 11 11 Systems	Indirect evidence	Ascot, United Kingdom	1,001-5,000	59 contacts →
	Indirect evidence “11:11 Systems is a managed infrastructure solutions provider that empowers customers to modernize, protect, and manage mission-critical applications and data, leveraging 11:11’s…” Source: RevenueBase Database · checked Aug 31, 2026
18	Cloudzenia	Strong evidence	London, United Kingdom	51-200	47 contacts →
	Strong evidence “CloudZenia specializes in Managed DevOps, Cloud Engineering, Migration, Backup & DR, Managed Services, and Security Solutions.” Source: RevenueBase Database · checked Aug 31, 2026
19	IT Farm LTD	Partial evidence	Manchester, United Kingdom	11-50	35 contacts →
	Partial evidence “Secure, compliant and resilient Cloud IT for legal, accounting, financial and professional service companies IT Farm helps you focus on the sustainability and long term growth of…” Source: RevenueBase Database · checked Aug 31, 2026
20	defense.com	Partial evidence	Stevenage, United Kingdom	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 Aug 31, 2026
21	ONAPP	Partial evidence	London, United Kingdom	51-200	31 contacts →
	Partial evidence “OnApp makes cloud fast, easy & profitable for Telcos, MSPs & other cloud service providers.” Source: RevenueBase Database · checked Aug 31, 2026
22	Skye Cloud LTD	Partial evidence	London London, United Kingdom	11-50	28 contacts →
	Partial evidence “Not your standard "one-size fits all" commoditised Cloud Service Provider, Skye Cloud are passionate about the flexibility and versatility Cloud Computing has to offer and have…” Source: RevenueBase Database · checked Aug 31, 2026
23	Synextra	Indirect evidence	Warrington, United Kingdom	11-50	27 contacts →
	Indirect evidence “Tech is more demanding than ever, but traditional MSPs are stuck in the past.” Source: RevenueBase Database · checked Aug 31, 2026
24	Axians C&c Nouveau Solutions LTD	Strong evidence	Wokingham, United Kingdom	11-50	26 contacts →
	Strong evidence “Axians Cloud & Cybersecurity is a specialist IT managed services company with a strategic focus on delivering cloud, infrastructure, compliance, network and security solutions.” Source: RevenueBase Database · checked Aug 31, 2026
25	Vambrace Cybersecurity	Indirect evidence	Leeds, United Kingdom	11-50	23 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 Aug 31, 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 security management 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 security management companies.
Partial evidence: Its own public description names part of cloud security management companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cloud security management 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 287 cloud security management companies based in the United Kingdom

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Cloud security management companies based in the United Kingdom at a glance

As of Aug 31, 2026

50.3%Verified-email coverage

15.0%Mobile-number coverage

34.0Average contacts per company

11-50Median size (employees)

43.2%Largest-city concentration · London

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

134

11-50

108

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 security management 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 security management 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 security management 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 security management 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, 4,906 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 August 31, 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.

Cloud security management companies by metro

Cloud security management companies in London124

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

RevenueBase identified 287 cloud security management companies headquartered in the United Kingdom as of August 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 security management companies?

London leads with 124 headquartered companies, followed by Manchester (9) and Leeds (7).

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 4,906 verified decision-maker contacts tracked across these 287 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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.