Renaissance Fusion
Updated: September 12, 2026
Founder Francesco A. Volpe
Country: France | Funding: €47M (+)
Website: https://renfusion.eu
Renaissance Fusion is a high-temperature superconductor and stellarator company. It has simplified the stellarator design: built 1D or 2D coils (on cylindrical surfaces, not necessarily of circular cross-section) to generate the complex 3D magnetic fields. The startup is also skipping some intermediate steps and directly depositing and patterning High Temperature Superconductors on large surfaces. The benefits are impressive: a 4x increase in magnetic field reduces the plasma volume by 256x. The liquid Lithium-based walls of the reactor stop 99.99% of the neutron energy before they can reach solid materials and make them radioactive.
Website: https://renfusion.eu
Renaissance Fusion is a high-temperature superconductor and stellarator company. It has simplified the stellarator design: built 1D or 2D coils (on cylindrical surfaces, not necessarily of circular cross-section) to generate the complex 3D magnetic fields. The startup is also skipping some intermediate steps and directly depositing and patterning High Temperature Superconductors on large surfaces. The benefits are impressive: a 4x increase in magnetic field reduces the plasma volume by 256x. The liquid Lithium-based walls of the reactor stop 99.99% of the neutron energy before they can reach solid materials and make them radioactive.
