Commonwealth Fusion Systems vs Kyoto Fusioneering
Commonwealth Fusion Systems
Designing and building commercial fusion systems to provide limitless, clean energy to the world
1079 employees · est. 2018 · Devens, United States
Kyoto Fusioneering
Pioneering the Engineering and Technology for a Sustainable Fusion-Powered Future
67 employees · est. 2019 · Tokyo, Japan
Commonwealth Fusion Systems is the older company (2018 vs 2019); Commonwealth Fusion Systems is the larger of the two.
Side-by-Side Comparison
| Metric | Commonwealth Fusion Systems | Kyoto Fusioneering |
|---|---|---|
| Founded | ||
| Founded | 2018 older | 2019 |
| Headquarters | ||
| Headquarters | Devens, United States | Tokyo, Japan |
| Employees | ||
| Employees | 1079 larger | 67 |
| Industry | ||
| Industry | ESG, Energy, Renewable Energy | Clean Energy |
| Funding Stage | ||
| Funding Stage | Series B | Series C |
| Total Funding | ||
| Total Funding | $2.88B | $14.97B |
| Funding Rounds | ||
| Funding Rounds | 7 | 8 |
| Services | ||
| Services | Not tracked yet | Development of fusion technology, Engineering and design of advanced energy systems, Research in nuclear fusion applications, Innovative energy solutions for sustainability |
| Target Customers | ||
| Target Customers | Not tracked yet | Energy sector companies, Environmental organizations, Government and policy-makers, Research institutions, Investors in sustainable technologies |
| Taxonomy | ||
| Taxonomy | Fusion EnergyClean EnergyHigh-temperature Superconducting MagnetsMIT CollaborationEnergy TechnologyDecarbonization +8 | Fusion EnergyGyrotron SystemsFusion Power Plant DesignFusion Fuel CyclePlasma Heating SystemsIntegrated Testing Facilities +9 |
| Website | ||
| Website | cfs.energy | kyotofusioneering.com |
About Commonwealth Fusion Systems
Commonwealth Fusion Systems is a startup dedicated to designing and building commercial fusion systems with the goal of providing limitless, clean energy to the world. Collaborating with MIT, the company leverages decades of research combined with new groundbreaking high-temperature superconducting...
About Kyoto Fusioneering
Kyoto Fusioneering is at the forefront of revolutionizing the energy sector with innovative fusion technology. Founded in 2019 and headquartered in Japan, this company strives towards creating a sustainable fusion-powered future. Specializing in clean energy, Kyoto Fusioneering positions itself as...
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Compiled from the BounceWatch company index. We last looked at Commonwealth Fusion Systems on 11 Sep 2024, and Kyoto Fusioneering on 5 Nov 2025. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.
