Company lists · Data verified August 2026

Top 25 Devops security companies based in the United Kingdom

Name: Devops security 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 193 companies tracked

There are 193 devops security companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 2,016 professional contacts across them, including 591 with verified work emails and 280 with mobile numbers. London is the largest hub.

This list covers devops 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. Data current as of August 28, 2026.

193Companies

2,016Contacts tracked

591Verified emails

280Mobile numbers

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The 25 largest devops security companies based in the United Kingdom

Ranked by team size

Top 25 of 193 devops security 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	Obsidian Security	Cheltenham	51-200	234	159
2	Bulletproof Cyber Security	London	51-200	118	75
3	Telesoft	Blandford	51-200	68	19
4	MDSEC	Macclesfield	11-50	60	33
5	Garrison NOW A Part Of Everfox	London	51-200	59	2
6	Secureflag	London	51-200	55	34
7	Riversafe	London	11-50	55	1
8	Cloudzenia	London	51-200	47	18
9	Coretech Security	Cheltenham	51-200	41	7
10	Corewide LLP	London	11-50	31	10
11	Dnssense	London	51-200	30	14
12	Equixly	London	11-50	28	21
13	Mindtech Services	London	51-200	26	3
14	Redfox Cybersecurity	London	11-50	24	6
15	Vambrace Cybersecurity	Leeds	11-50	23	11
16	4secure LTD	Northampton	11-50	22	13
17	CYPRO	London	11-50	22	12
18	Dops Digital	London	11-50	20	13
19	Hexiosec	Cheltenham	11-50	18	11
20	Assure Technical	Malvern	11-50	16	10
21	Cloudsecure	Cheltenham	11-50	15	7
22	Everycloud AI & Data Security	London	11-50	14	9
23	Invicta Software	Quorn	11-50	12	5
24	Disclosure Cybersecurity	London	11-50	11	7
25	QUEMA	London	11-50	11	2

Showing 25 of 193 devops security companies based in the United Kingdom

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Devops security companies based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 110 HQs

280Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

119

11-50

51-200

501-1,000

Devops security companies by metro

Metro	Companies
Devops security companies in London	110
Devops security companies in Manchester	9
Devops security companies in Birmingham	5
Devops security companies in Cheltenham	5
Devops security companies in Leeds	4
Devops security companies in Cambridge	3
Devops security companies in Poole	2

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 “devops security 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; 0 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 devops security companies are there based in the United Kingdom?

There are 193 devops security companies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Obsidian Security, headquartered in Cheltenham, tops this list with the largest team on record.

Which city has the most devops security companies?

London leads with 110 headquartered companies, followed by Manchester (9) and Birmingham (5).

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 591 verified decision-maker contacts tracked across these 193 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.