Company lists · Data verified 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 Verified Aug 28, 2026 287 companies tracked

There are 287 cloud security management companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase 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. Data current as of August 28, 2026.

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 verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Sophos	Abingdon	5,001-10,000	4,963	2,711
2	Netwrix Corporation	London	501-1,000	799	550
3	Devoteam Google Cloud Partner	London	501-1,000	546	130
4	Iomart	Glasgow	201-500	422	200
5	Obsidian Security	Cheltenham	51-200	234	159
6	Cloud Direct	n/a	51-200	168	106
7	CSI LTD A CSI Group Company	London	201-500	161	116
8	Cyberfort	Thatcham	51-200	160	88
9	Bulletproof Cyber Security	London	51-200	118	75
10	Virtual IT LTD	Laindon	51-200	79	51
11	Instant On IT	London	51-200	69	53
12	Cloudrise	London	51-200	69	42
13	Tuliptech	Leicester	51-200	68	39
14	Telesoft	Blandford	51-200	68	19
15	Cogeco Peer 1	Southampton	501-1,000	67	7
16	Surveil	East Horsley	51-200	61	40
17	Iland 11 11 Systems	Ascot	1,001-5,000	59	20
18	Cloudzenia	London	51-200	47	18
19	IT Farm LTD	Manchester	11-50	35	1
20	defense.com	Stevenage	51-200	32	13
21	ONAPP	London	51-200	31	11
22	Skye Cloud LTD	London London	11-50	28	20
23	Synextra	Warrington	11-50	27	23
24	Axians C&c Nouveau Solutions LTD	Wokingham	11-50	26	5
25	Vambrace Cybersecurity	Leeds	11-50	23	11

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 28, 2026

11-50Median size (employees)

LondonLargest hub · 124 HQs

1,460Contacts with mobile numbers

27Emails re-verified in last 30 days

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

Cloud security management companies by metro

Metro	Companies
Cloud security management companies in London	124
Cloud security management companies in Manchester	9
Cloud security management companies in Leeds	7
Cloud security management companies in Bristol	6
Cloud security management companies in Glasgow	4
Cloud security management companies in Birmingham	4
Cloud security management companies in Cheltenham	4

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cloud security management companies”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 27 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cloud security management companies are there based in the United Kingdom?

There are 287 cloud security management companies headquartered in the United Kingdom as of August 2026 (RevenueBase).

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 is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.