Company lists · Data verified August 2026

Top 17 Cybersecurity companies based in Cheltenham, United Kingdom

Name: Cybersecurity companies based in Cheltenham, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 31 companies tracked

Our directory lists 31 cybersecurity companies based in Cheltenham, United Kingdom, with 466 professional contacts and 248 email addresses. The list was last updated in August 2026, and London is the single most-represented city among the companies listed.

Cybersecurity companies provide products and services that protect systems, networks, applications, devices, and data from unauthorized access, disruption, or misuse. This list covers companies that provide cybersecurity products, services, consulting, assessments, monitoring, incident response, or related protection for digital systems and data. Ranked by team size, largest first. Data current as of August 28, 2026.

31Companies

466Contacts tracked

248Verified emails

143Mobile numbers

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The 17 largest cybersecurity companies based in Cheltenham, United Kingdom

Ranked by team size

Top 17 of 31 cybersecurity companies based in Cheltenham, 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	Coretech Security	Cheltenham	51-200	41	7
3	Salus Cyber	Cheltenham	11-50	31	18
4	Cy2	Cheltenham	11-50	25	6
5	AMR Cybersecurity	Cheltenham	11-50	23	17
6	Hexiosec	Cheltenham	11-50	18	11
7	B10sec	Cheltenham	11-50	16	6
8	Nova Blue Technologies	Cheltenham	1-10	11	5
9	Foundry Zero	Cheltenham	11-50	10	5
10	Exacttrak LTD	Cheltenham	11-50	7	2
11	P3m Works	Cheltenham	1-10	6	2
12	Keysigma	Cheltenham	1-10	4	3
13	Deepminds	Cheltenham	1-10	4	2
14	North Green Security	Cheltenham	1-10	3	1
15	Sentrium Security LTD	Cheltenham	1-10	2	2
16	Sentients	Cheltenham	1-10	1	1
17	Achromatic Security LTD	Cheltenham	1-10	1	1

Showing 17 of 31 cybersecurity companies based in Cheltenham, United Kingdom

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Cybersecurity companies based in Cheltenham, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 876 HQs

143Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Cybersecurity companies by metro in the United Kingdom

Metro	Companies
Cybersecurity companies in London	876
Cybersecurity companies in Manchester	72
Cybersecurity companies in Birmingham	34
Cybersecurity companies in Cheltenham	31
Cybersecurity companies in Cambridge	28
Cybersecurity companies in Leeds	22
Cybersecurity companies in Bristol	21

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 “cybersecurity companies”, with match quality audited by blind human judging, and headquartered in Cheltenham, 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; 3 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 cybersecurity companies are in the directory?

The directory lists 31 cybersecurity companies based in Cheltenham, United Kingdom.

Which city has the most cybersecurity companies?

London is the single most-represented city among the cybersecurity companies on the list.

How many contacts are available for cybersecurity companies?

The directory includes 466 professional contacts and 248 email addresses for the listed cybersecurity companies.

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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.