Company lists · Data verified August 2026

Top 25 Defense technology software startups based in the United Kingdom

Name: Defense technology software startups 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 67 companies tracked

There are 67 defense technology software startups headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 3,118 professional contacts across them, including 935 with verified work emails and 667 with mobile numbers. London is the largest hub.

This list covers defense technology software startups 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.

67Companies

3,118Contacts tracked

935Verified emails

667Mobile numbers

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The 25 largest defense technology software startups based in the United Kingdom

Ranked by team size

Top 25 of 67 defense technology software startups 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	Everfox	London	1,001-5,000	635	13
4	MASS	Lincoln	201-500	633	203
5	Calytrix Technologies	n/a	51-200	58	32
6	Brotecs Technologies	London	51-200	58	26
7	Parico	Bordon	11-50	33	25
8	Hamiltonian Dynamics	Manchester	11-50	23	1
9	Itsus Consulting	Llanishen Cardiff South	11-50	20	13
10	Borwell	Great Malvern	11-50	20	2
11	Disruptive Industries	London	11-50	19	1
12	Sirius Digital Services	Portsmouth	11-50	18	2
13	Exsel Group	London	51-200	17	8
14	Espanaro	Newtown Wales	11-50	14	7
15	Antillion	Bristol	11-50	12	10
16	Igence Software LTD	East Grinstead	11-50	11	6
17	Cirrus Software Solutions	Bristol	11-50	11	6
18	2ic Limited	Richmond	1-10	11	6
19	Foundry Zero	Cheltenham	11-50	10	5
20	Devnack	Edinburgh	11-50	6	4
21	The Aardvark Group	Dumfries	11-50	4	3
22	Ultra Horizon	London	1-10	4	2
23	Tekchain LTD	London	1-10	2	2
24	Harmonic Software Systems	n/a	1-10	2	1
25	Newton Systems LTD	New Waltham	1-10	2	1

Showing 25 of 67 defense technology software startups based in the United Kingdom

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Defense technology software startups based in the United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 22 HQs

667Contacts 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 technology software startups by metro

Metro	Companies
Defense technology software startups in London	22
Defense technology software startups in Manchester	6
Defense technology software startups in Edinburgh	2
Defense technology software startups in Bristol	2
Defense technology software startups in Exeter	2
Defense technology software startups in Cheltenham	2
Defense technology software startups 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 “defense technology software startups”, 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 technology software startups are there based in the United Kingdom?

There are 67 defense technology software startups 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 technology software startups?

London leads with 22 headquartered companies, followed by Manchester (6) and Edinburgh (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 935 verified decision-maker contacts tracked across these 67 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.