tracking the world's fusion effort
FormulaFusion
Every serious fusion programme, one comparable dataset.
Private fusion developers ranked on time-averaged power density, with a separate evidence grade for every claim. Every row lists its sources, an evidence grade, a data-confidence rating and an as-of date.
The index today
40
entities tracked
35
plant developers
62
source references
15
confinement concepts
Championship A (design-point power density) is not yet ranked: no private developer has publicly disclosed a matched power and island-volume pair. Volumes show as “—” by design.
Championship B — evidence grades
Rates the company's technical claim, published beside — never blended into — the density number.
- Measured on hardware of that class
- Subscale demonstrated and larger machine under construction
- Design point published with independent technical backing
- Company-stated design point, no independent validation
- Inferred from partial or indirect disclosure
Named sites and grid connections
Developers with a named flagship site — where a real siting conversation is plausible in the next 24 months.
Helion EnergyOrion plant, Malaga, WANamed site; under construction
General FusionItaly (site TBD under Renexia framework)Framework/MOU stage — milestone-based, no site named yet
TAE TechnologiesUnder evaluation — multiple US statesActive site evaluation (not yet named)
Type One EnergyBull Run (former TVA coal plant), Anderson County, TN + UK site TBDNamed US site (retired coal repurposing); UK site under consortium development
Zap EnergyCentralia, WA (feasibility stage)Feasibility study underway; not yet a named commitment
Commonwealth Fusion SystemsFall Line Fusion Power Station, Chesterfield County, VANamed site; PJM interconnection application filed Apr 2026