Company lists · Data verified August 2026

Top 20 Defense software companies based in the United Kingdom

Name: Defense software 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 49 companies tracked

There are 49 defense software companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 2,128 professional contacts across them, including 886 with verified work emails and 309 with mobile numbers. London is the largest hub.

This list covers defense software 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.

49Companies

2,128Contacts tracked

886Verified emails

309Mobile numbers

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The 20 largest defense software companies based in the United Kingdom

Ranked by team size

Top 20 of 49 defense software 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	ROKE	Manchester	1,001-5,000	684	410
2	Metrea	London	501-1,000	674	143
3	Bagira	Westminster	201-500	219	130
4	Elbit Systems UK	n/a	501-1,000	135	61
5	Calytrix Technologies	n/a	51-200	58	32
6	Parico	Bordon	11-50	33	25
7	Hamiltonian Dynamics	Manchester	11-50	23	1
8	4secure LTD	Northampton	11-50	22	13
9	Borwell	Great Malvern	11-50	20	2
10	Jd2e	Wellingore Hall	11-50	19	12
11	Sirius Digital Services	Portsmouth	11-50	18	2
12	Exsel Group	London	51-200	17	8
13	C Software Limited	Tewkesbury	11-50	13	10
14	Antillion	Bristol	11-50	12	10
15	Igence Software LTD	East Grinstead	11-50	11	6
16	Cirrus Software Solutions	Bristol	11-50	11	6
17	2ic Limited	Richmond	1-10	11	6
18	Devnack	Edinburgh	11-50	6	4
19	The Aardvark Group	Dumfries	11-50	4	3
20	Attomus	London	11-50	1	1

Showing 20 of 49 defense software companies based in the United Kingdom

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Defense software companies based in the United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 13 HQs

309Contacts with mobile numbers

1Emails 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

Defense software companies by metro

Metro	Companies
Defense software companies in London	13
Defense software companies in Manchester	4
Defense software companies in Bristol	3
Defense software companies in Tewkesbury	2
Defense software companies in Bordon	1
Defense software companies in Glasgow	1
Defense software companies in Cambridge	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 “defense software 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; 1 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 defense software companies are there based in the United Kingdom?

There are 49 defense software companies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

ROKE, headquartered in Manchester, tops this list with the largest team on record.

Which city has the most defense software companies?

London leads with 13 headquartered companies, followed by Manchester (4) and Bristol (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 886 verified decision-maker contacts tracked across these 49 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.