Company lists · Data verified August 2026

Top 25 Aerospace cybersecurity companies based in the United Kingdom

Name: Aerospace cybersecurity 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 76 companies tracked

There are 76 aerospace cybersecurity companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 1,281 professional contacts across them, including 201 with verified work emails and 412 with mobile numbers. London is the largest hub.

This list covers aerospace cybersecurity 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.

76Companies

1,281Contacts tracked

201Verified emails

412Mobile numbers

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The 25 largest aerospace cybersecurity companies based in the United Kingdom

Ranked by team size

Top 25 of 76 aerospace cybersecurity 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	Everfox	London	1,001-5,000	635	13
2	Foresite Cybersecurity	Farnborough	51-200	100	67
3	Garrison NOW A Part Of Everfox	London	51-200	59	2
4	defense.com	Stevenage	51-200	32	13
5	Citation Cyber	Bailrigg	11-50	30	11
6	Encode	London	51-200	25	9
7	4secure LTD	Northampton	11-50	22	13
8	Livelink Aerospace LTD	Lavant	51-200	19	9
9	Clearswift	Berkshire	201-500	19	4
10	Infosec K2k	London	51-200	17	8
11	Xpertex LTD	Welwyn Garden City	11-50	13	9
12	Gardpass Consulting & Space	London	51-200	12	8
13	Disclosure Cybersecurity	London	11-50	11	7
14	Nova Blue Technologies	Cheltenham	1-10	11	5
15	Coc00n Cyber	London	1-10	8	7
16	Hytec Information Security, A Civica Company	Teddington	11-50	8	4
17	JC Cyber Security Services	Birmingham	1-10	8	1
18	Ultra Horizon	London	1-10	4	2
19	Kit365	Leicester	1-10	4	1
20	Dark Taurus	London	1-10	3	1
21	CSIQ	Rowlands Castle	1-10	2	2
22	Plan G Technology LTD	Oxford	1-10	2	2
23	Camwey	Guildford	11-50	2	1
24	Systems Secure LTD	Copthorne	1-10	2	1
25	Newton Systems LTD	New Waltham	1-10	2	1

Showing 25 of 76 aerospace cybersecurity companies based in the United Kingdom

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Aerospace cybersecurity companies based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 32 HQs

412Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Aerospace cybersecurity companies by metro

Metro	Companies
Aerospace cybersecurity companies in London	32
Aerospace cybersecurity companies in Manchester	4
Aerospace cybersecurity companies in Bristol	2
Aerospace cybersecurity companies in Oxford	1
Aerospace cybersecurity companies in Wakefield	1
Aerospace cybersecurity companies in Inverness	1
Aerospace cybersecurity companies in Richmond	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 “aerospace cybersecurity 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 aerospace cybersecurity companies are there based in the United Kingdom?

There are 76 aerospace cybersecurity companies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Everfox, headquartered in London, tops this list with the largest team on record.

Which city has the most aerospace cybersecurity companies?

London leads with 32 headquartered companies, followed by Manchester (4) and Bristol (2).

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 201 verified decision-maker contacts tracked across these 76 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.