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Renaissance Fusion

Renaissance Fusion is a Grenoble, France-based stellarator fusion company developing high-temperature superconducting magnets and liquid metal shields.

Last updated September 16, 2026

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Overview

Renaissance Fusion builds stellarators, described on its website as efficient, steady and stable fusion machines, using unique High Temperature Superconducting (HTS) magnets and Liquid Metal Shields. The company states it is the first magnetic-confinement fusion start-up launched in continental Europe and operates in Grenoble, France, a region it says concentrates up to 40% of the world's fusion talent, laboratories and universities. Its stated approach includes direct deposition and laser patterning of HTS coils, simplified assembly of stellarator coil winding surfaces, and neutron shielding and heat extraction via flowing liquid metals.

History

Renaissance Fusion is a stellarator fusion reactor company based in Grenoble, France. On its website, the company describes itself as the first magnetic-confinement fusion start-up launched in continental Europe, operating in a region that concentrates up to 40% of the world's fusion talent, laboratories and universities. It states that it builds stellarators using unique High Temperature Superconducting (HTS) magnets and Liquid Metal Shields, with the aim of bringing stellarators out of the lab and onto the grid, and that it is industrializing each core technology to prepare fusion for real-world energy deployment.

Products and positioning

Developer of stellarator fusion machines using HTS magnets and liquid metal shields, aiming to bring stellarators out of the lab and onto the grid.

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