Startup list · Europe
Nuclear fusion startups in Europe
Below are the top European nuclear fusion startups, ranked by total funding. Together the 37 companies on this list have raised a combined $1.7B, and include 2 unicorns. The strongest hubs are United Kingdom, Germany, Italy.
$1.7Bcombined funding · 37 companies
United Kingdomtop hub
37companies shown
2unicorns
Ranked by total funding · Updated 2026-10-22 · Source: Dealroom
| # | Company | Founded | HQ | Funding |
|---|---|---|---|---|
| 1 |
 P
Proxima FusionUnicorn
QI-HTS stellarator fusion company building Europe’s commercial fusion plants
|
2023 | Munich, Germany | $651M |
| 2 |
 F
Focused EnergyUnicorn
Combining U.S. fusion science with German laser engineering to deliver modular, commercially viable fusion from proven ignition technology
|
2021 | Darmstadt, Germany | $327M |
| 3 |
 T
Tokamak Energy
Commercial fusion energy via spherical tokamaks and HTS magnets.
|
2009 | Milton, United Kingdom | $294M |
| 4 |
 M
Marvel Fusion
Marvel Fusion develops fusion energy using low-neutronic fuels, short-pulsed lasers, and nanostructured targets for efficient, scalable solutions
|
2019 | Munich, Germany | $167M |
| 5 |
 F
First Light Fusion
Inspired by the only natural example of inertial confinement on Earth, First Light Fusion is developing a practical pathway to fusion energy using the simplest machine possible
|
2011 | Yarnton, United Kingdom | $135M |
| 6 |
 R
Renaissance FusionFast growing
Renaissance Fusion builds on the success of stellarator experiments, makes them reactor-ready by quadrupling the magnetic field and simplifies them using proprietary High-Temperature Superconductors manufacturing and flowing liquid-metal walls
|
2020 | Fontaine, France | $52M |
| 7 |
 A
Astral SystemsFast growing
Compact multi-state fusion reactors for medical radioisotope production
|
2021 | Dorchester, United Kingdom | $36M |
| 8 |
 N
Novatron Fusion Group
Cost-effective fusion energy solution using stable magnetic mirrors
|
2019 | Stockholms kommun, Sweden | $20M |
| 9 |
 S
StandardXDealroom profile unavailable
Scalable production of rare isotopes for medicine
|
2025 | London, United Kingdom | $13M |
| 10 |
 G
Gauss Fusion
Industrial-scale stellarator fusion power plant development
|
2021 | Hanau, Germany | $11M |
| 11 |
 F
Fusionality
Integrated control and data systems for fusion devices.
|
2026 | Lausanne, Switzerland | $4M |
| 12 |
 J
Jurlina Coenergy
New Plasma Acceleration Method
|
2024 | Zagreb, Croatia | $3M |
| 13 | O Oxyntix Fusion power generation via extreme intensity bubble collapse | 2011 | Oxford, United Kingdom | $1M |
| 14 |
 S
Suprema
Critical HTS tapes for compact magnetic fusion reactors, essential for advancing energy technology
|
2024 | Rome, Italy | $990K |
| 15 |
 P
Pulsar Fusion
Private company working on nuclear fusion propulsion technology and advanced space propulsion systems
|
2014 | Milton Keynes, United Kingdom | $660K |
| 16 |
 M
MuWave
High-power microwave systems for fusion energy commercialization
|
2023 | London, United Kingdom | $594K |
| 17 |
 C
Crossfield Fusion
Crossfield Fusion has been developing a novel compact fusion reactor targeting carbon free heat and power generation. The company adopted a new approach to building fusion reactors based on patented technology called the Epicyclotron
|
2019 | London, United Kingdom | $251K |
| 18 |
 F
Firefly Fusion
Firefly Fusion will develop standard tokamaks as the most promising and fastest path to fusion energy
|
2024 | Lausanne, Switzerland | $50K |
| 19 |
 L
Larmor mmWave SystemsDealroom profile unavailable
Industrialized high-power microwave sources for future industries.
|
2026 | Ecublens, Switzerland | $37K |
| 20 |
 M
Magnetic Future
Contactless power supplies for superconducting magnets.
|
2025 | Imola, Italy | — |
| 21 |
 D
DANTE Fusion
Commercial fusion neutron source for multiple industries
|
2026 | Copenhagen, Denmark | — |
| 22 |
 M
Magnestar Technologies
Design and manufacturing of superconducting magnet systems.
|
2025 | Madrid, Spain | — |
| 23 |
 A
Atum Energies
Advanced plasma confinement for commercially viable fusion power.
|
2026 | London, United Kingdom | — |
| 24 |
 S
Snap Fusion
Bringing nuclear fusion power down to chip scale.
|
2026 | Munich, Germany | — |
| 25 |
 C
Chatwood Labs
Control-first fusion architecture research and development.
|
2025 | Manchester, United Kingdom | — |
| 26 |
 A
Artemis Targetra GmbH
"Fuel" supply chain in the era of Laser Fusion industry.
|
2025 | Aachen, Germany | — |
| 27 |
 P
Prometheus Plasma Systems
Plasma turbomachinery for aerospace and high-energy applications
|
2026 | Rome, Italy | — |
| 28 |
 T
Thunderchild Fusion
Nuclear fusion research using nanomaterials and electrochemistry
|
2021 | Dublin, Ireland | — |
| 29 |
 C
Cambridge MultiPhysics
Cloud-native multiphysics simulation software for extreme conditions
|
2017 | Cambridge, United Kingdom | — |
| 30 | M MWB Gyrotron Industries High-power gyrotron systems for industrial and research applications | 2025 | Munich, Germany | — |
| 31 |
 E
Elpis Fusion
Fusion energy startup developing a compact, modular reactor using mature technologies
|
2023 | Eindhoven, Netherlands | — |
| 32 |
 B
Bay Fusion
|
2021 | Lancaster, United Kingdom | — |
| 33 |
 N
Next Step Fusion
AI-powered tokamak simulation and plasma control software
|
2023 | Luxembourg, Luxembourg | — |
| 34 |
 O
Oxford SigmaDealroom profile unavailable
Advanced materials engineering and validation for fusion, nuclear and defence applications
|
2019 | Oxford, United Kingdom | — |
| 35 |
 D
Deutelio
Fusion energy via poloidal magnetic confinement technology
|
2022 | Gavirate, Italy | — |
| 36 |
 A
Aqsorption
Membrane-free electrolysis for hydrogen production and waste treatment
|
2013 | Nottingham, United Kingdom | — |
| 37 |
 F
Fusion Reactors
Building fusion energy reactors
|
2019 | Goring-on-Thames, United Kingdom | — |
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