Startup Rankings
Top Defence Startups in the UK 2026
Last updated · 12 companies · compiled from public data sources
The United Kingdom hosts 12 of the defence startups tracked in the fieldfaster dataset, with teams in London, Harwell, Bletchley and beyond. Focus areas include space, autonomy and AI, energetics and propulsion.
Every entry is a short factual profile compiled from public sources: what the company builds, where it is based and when it was founded. The ranking favours established teams, ordering companies by team size band first and company age second. No funding figures are used.
- 1.
Improbable
London · founded 2012
Improbable builds large-scale simulation and synthetic environment technology applied to defence wargaming and training.
simulation-trainingRead moreSources: fieldfaster curated dataset (public sources)
- 2.
Open Cosmos
Harwell · founded 2015
Open Cosmos designs, builds and operates small satellite missions and shared constellations for governments and industry.
spaceRead moreSources: fieldfaster curated dataset (public sources)
- 3.
Adarga
London · founded 2016
Adarga develops Vantage, an AI-driven information analysis platform used by UK defence and national security customers.
autonomy-aiRead moreSources: fieldfaster curated dataset (public sources)
- 4.
Windracers
Southampton · founded 2017
Windracers builds the ULTRA autonomous fixed-wing cargo drone for logistics in contested and remote environments.
Sources: fieldfaster curated dataset (public sources)
- 5.
Skyral
London · founded 2022
Skyral provides a modelling and simulation platform used by governments and militaries for planning and training.
simulation-trainingRead moreSources: fieldfaster curated dataset (public sources)
- 6.
Pulsar Fusion
Bletchley · founded 2013
Pulsar Fusion develops advanced rocket propulsion, including nuclear fusion concepts, for next-generation in-space mobility.
Sources: fieldfaster curated dataset (public sources)
- 7.
Space Forge
Cardiff · founded 2018
Space Forge develops returnable satellites for manufacturing advanced semiconductors and materials in orbit, with defence supply chain relevance.
Sources: fieldfaster curated dataset (public sources)
- 8.
Magdrive
Harwell · founded 2019
Magdrive develops metal-fueled plasma propulsion giving spacecraft high thrust and maneuverability, relevant to space defence operations.
Sources: fieldfaster curated dataset (public sources)
- 9.
Living Optics
Oxford · founded 2020
Living Optics builds compact hyperspectral cameras that reveal what conventional imaging misses, with security and defence sensing applications.
isr-sensingRead moreSources: fieldfaster curated dataset (public sources)
- 10.
Labrys Technologies
London · founded 2022
Labrys Technologies builds secure coordination, identity and payment tools used by defence and humanitarian actors in contested environments.
Sources: fieldfaster curated dataset (public sources)
- 11.
Arondite
London · founded 2024
Arondite builds AI infrastructure that connects autonomous systems and humans across defence missions.
autonomy-aiRead moreSources: fieldfaster curated dataset (public sources)
- 12.
Cambridge Aerospace
Cambridge · founded 2024
Cambridge Aerospace develops Skyhammer, a low-cost interceptor designed to defeat drones and cruise missiles at scale.
Sources: fieldfaster curated dataset (public sources)
Have we missed your startup?
Companies are ranked by team size band and company age, using short factual profiles compiled from public sources. No funding figures are used. If your European defence startup belongs on this list, tell us and we'll review it for the next update.