Company lists · Data verified August 2026

Top 15 Cybersecurity appliance manufacturers based in the United Kingdom

Name: Cybersecurity appliance manufacturers 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 43 companies tracked

There are 43 cybersecurity appliance manufacturers headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 1,034 professional contacts across them, including 421 with verified work emails and 88 with mobile numbers. London is the largest hub.

This list covers cybersecurity appliance manufacturers 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.

43Companies

1,034Contacts tracked

421Verified emails

88Mobile numbers

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The 15 largest cybersecurity appliance manufacturers based in the United Kingdom

Ranked by team size

Top 15 of 43 cybersecurity appliance manufacturers 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	Quorum Cyber	Edinburgh	201-500	292	177
2	Khipu Networks	Fleet	51-200	129	94
3	Becrypt	London	51-200	69	56
4	Eset UK	Bournemouth	51-200	66	41
5	Garrison NOW A Part Of Everfox	London	51-200	59	2
6	Dnssense	London	51-200	30	14
7	Encode	London	51-200	25	9
8	4secure LTD	Northampton	11-50	22	13
9	Clearswift	Berkshire	201-500	19	4
10	Chaser Systems	Cambridge	1-10	5	4
11	Idappcom LTD	Ludlow	11-50	5	3
12	Cyberrock LTD	London	1-10	2	1
13	Systems Secure LTD	Copthorne	1-10	2	1
14	Q Industries	Edinburgh	11-50	1	1
15	Cybersmith	Kettering	1-10	1	1

Showing 15 of 43 cybersecurity appliance manufacturers based in the United Kingdom

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Cybersecurity appliance manufacturers based in the United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 15 HQs

88Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

5,001-10,000

Cybersecurity appliance manufacturers by metro

Metro	Companies
Cybersecurity appliance manufacturers in London	15
Cybersecurity appliance manufacturers in Aylesbury	3
Cybersecurity appliance manufacturers in Edinburgh	3
Cybersecurity appliance manufacturers in Cambridge	1
Cybersecurity appliance manufacturers in Royal Leamington Spa	1
Cybersecurity appliance manufacturers in Bournemouth	1
Cybersecurity appliance manufacturers in Headquarters	1

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 appliance manufacturers”, 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; 2 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 appliance manufacturers are there based in the United Kingdom?

There are 43 cybersecurity appliance manufacturers headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Quorum Cyber, headquartered in Edinburgh, tops this list with the largest team on record.

Which city has the most cybersecurity appliance manufacturers?

London leads with 15 headquartered companies, followed by Aylesbury (3) and Edinburgh (3).

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 421 verified decision-maker contacts tracked across these 43 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.