Renaissance Fusion

What Renaissance Fusion does

Renaissance Fusion is a French deep-technology company founded in 2020 and headquartered in Fontaine, near Grenoble, that develops stellarator fusion reactors. Its technical bet combines high-temperature superconducting (HTS) magnets — manufactured via proprietary laser patterning — with liquid metal walls, a configuration intended to enable continuous operation and simplify maintenance relative to competing magnetic confinement approaches. The company is targeting first plasma around 2026, a full demonstrator by approximately 2030, and commercial reactors in the early 2030s.

The company's products and underlying technology span the full stellarator stack: HTS magnet production (including the Nicola 100 magnet and wide HTS tape development), liquid metal wall experimentation, and stellarator reactor engineering. It has built an in-house technical workforce of 96–120 employees, including 33 PhDs across 23–27 nationalities, and operates a Scientific and Technical Advisory Committee staffed by senior figures from the global fusion community. In October 2025, it acquired Italian engineering firm Phymtech Srl to form Renaissance Fusion Italia in Pisa, establishing its first non-French subsidiary.

Renaissance Fusion is pre-revenue and does not yet sell electricity, reactors, or licensed technology under commercial contracts. Its business model is currently capital-funded: the company has raised approximately €57M to date across a €15M seed round (January 2023), a €10M France 2030 grant (December 2023), and a €32M Series A1 (March 2025). Long-term monetization is expected to derive from commercial fusion power generation and/or licensing of proprietary HTS magnet and liquid metal wall intellectual property to third-party reactor developers, energy utilities, and industrial partners in the energy and government research segments.

Name

Renaissance Fusion

Legal name

Renaissance Fusion SAS

Website

https://renfusion.eu

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

51–100 employees

Short description

Renaissance Fusion is a French deep-technology company founded in 2020 that develops stellarator fusion reactors using high-temperature superconducting magnets and liquid metal walls, targeting first plasma around 2026 and a commercial demonstrator by approximately 2030.

Ownership category

akta.pro rank

Product category

Nuclear Fusion Energy Systems

NAICS

Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing (334416)

SIC

Electronic Coils, Transformers & Other Inductors (3677)

akta.pro primary industry

Gen IV / Advanced Reactor Systems (SFR, LFR, GFR, MSR, HTGR, Microreactors) (EUAKADAC)

akta.pro secondary industry

Reactor Vessel, Internals & Primary Circuit Components (RPV, piping, pumps, valves) (EUAKADAE)

Keywords

• Stellarator fusion reactors
• High-temperature superconductors
• Liquid metal walls
• Fusion energy technology
• Nuclear fusion reactors

Headquarters

HQ city

Fontaine

HQ country

France

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Personnel, Infrastructure, Operations

Revenue model

1. Fusion Reactor Development and Licensing: As a pre-revenue deep-tech company, Renaissance Fusion is primarily funded through equity investments, government grants, and public-private partnerships. The company is developing its stellarator fusion reactor (targeting first demonstrator by ~2030, full reactor by early 2030s) and enabling technologies (HTS magnets, liquid metal systems). Revenue is expected to come from reactor licensing, technology licensing, and potentially power purchase agreements as commercial viability approaches.
2. High-Temperature Superconductor (HTS) Products: Wide HTS tapes manufactured via in-house PVD/MOCVD processes are positioned as commercially valuable products for applications beyond fusion, including electric motors/generators for offshore wind turbines, high-field gyrotron and MRI magnets, fault current limiters, undulators for synchrotrons, and particle accelerator magnets. This represents a near-term commercial revenue opportunity that can monetize HTS capabilities before fusion power plants are operational.
3. Enabling Technology Sales (Liquid Metal, HTS Systems): The company generates near-term commercial value by selling enabling technologies — liquid metal systems and HTS magnet systems — to external markets, including other fusion developers, research institutions, and industrial customers. This dual-business model creates revenue streams before full fusion deployment.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Renaissance Fusion develops stellarator-based magnetic confinement fusion reactors that use wide high-temperature superconducting (HTS) magnets manufactured in-house via PVD/MOCVD deposition and direct laser patterning, combined with liquid metal walls for plasma-facing surface management. The company is also commercializing its enabling technologies, including wide HTS tapes and HTS magnet systems, for adjacent industrial applications such as offshore wind generators, MRI magnets, fault current limiters, and particle accelerators. Its first full reactor demonstrator is targeted for approximately 2030.

Differentiator

Problem solved

Functional benefit

Products and services

• Chartreuse Series Stellarator Modular cylindrical stellarator fusion reactor design using 2D laser-engraved HTS modules assembled into toroidal arrays to generate the 3D magnetic confinement field, combined with flowing liquid metal walls for plasma-facing surface management. Targeted at governments, energy utilities, and research institutions seeking domestic fusion capability.
• HTS Magnet Nicola 100 A 1-meter non-insulated high-temperature superconducting magnet delivering peak fields of 6 Tesla, developed and built in-house as a background field source for liquid metal flow experiments and as a technology demonstrator for stellarator-scale magnet construction. Available to research institutions and fusion developers as a reference HTS magnet product.
• 20 cm Bore HTS Magnet A smaller non-insulated HTS magnet with a 20 cm bore generating peak fields approaching 1 Tesla, used for initial validation of in-house HTS magnet technology and as a reference product for research and development customers.
• Wide HTS Tapes Meter-wide high-temperature superconducting tapes manufactured in-house via PVD and MOCVD processes, replacing narrow-tape approaches used by competitors and enabling applications across electric motors, generators, MRI magnets, fault current limiters, synchrotron undulators, and particle accelerator magnets. Sold to industrial buyers, medical imaging manufacturers, and scientific instrumentation developers.
• Liquid Metal Wall System Patented liquid metal wall technology in which cylindrical modules are coated with flowing liquid metals such as liquid lithium, serving simultaneously as neutron shielding, heat extraction medium, and self-healing plasma-facing surface. Licensed or sold to other fusion developers, research institutions, and industrial customers requiring advanced plasma-facing components.

Quantifiable outcome

• Target: electricity cost below fossil fuels (economic fusion)
• +4 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Eight partnerships are on record, tiered core, strategic and minor.

• FusionX GroupcoreStrategic or Co-development Partner · 24 September 2026Co-organizer of FusionX:Europe, the leading European fusion industry event co-hosted by Renaissance Fusion in Grenoble on September 24, 2026, in conjunction with Grenoble's designation as European Capital of Innovation.
• Phymtech Srl (now Renaissance Fusion Italia)coreOEM/ Whitelabel/ Licensing Partner · 1 October 2025Italian company acquired by Renaissance Fusion in October 2025, rebranded as Renaissance Fusion Italia. Based in San Giuliano Terme (Pisa), Italy, it represents the company's expansion into the Italian fusion ecosystem and nuclear fusion challenge.
• ST Engineering (Singapore)strategicStrategic or Co-development Partner · 15 September 2025Renaissance Fusion was invited to a strategic meeting with ST Engineering organized by the Nuclear Industry Strategic Committee (CSFN) and held at EDF's Paris headquarters in September 2025. The meeting explored potential collaboration on simplified stellarator technology, zero-emissions energy, and enhanced safety. ST Engineering recognized the potential of Renaissance Fusion's technical solution.
• CEA (Commissariat à l'énergie atomique et aux énergies alternatives)coreStrategic or Co-development PartnerMajor French atomic energy commission and research organization. Co-organized the first summer school on stellarators in Aix-en-Provence (April 2025) and the second Renaissance Fusion–CEA Stellarator School (May 2026). CEA's Minatec facility in Grenoble hosts conference programs. Represents a deep collaborative relationship in fusion research and training.
• FuseNetcoreStrategic or Co-development PartnerEuropean fusion education association of which Renaissance Fusion is an active member. Partnered with Renaissance Fusion to host the first Fusion Winter School in Grenoble (December 2023) at the company's headquarters, providing students deep dives into stellarators, liquid metals, and HTS technologies.
• LNCMI (Laboratoire National des Champs Magnétiques Intenses)minorStrategic or Co-development PartnerNational High Magnetic Field Laboratory in Grenoble, France. Hosted external laboratory tours during Renaissance Fusion's Fusion Winter School, providing participants exposure to high magnetic field research facilities.
• ITER OrganizationminorStrategic or Co-development PartnerThe world's largest fusion project, located near Grenoble — the same region where Renaissance Fusion operates. Renaissance Fusion benefits from proximity to ITER's expertise; its STAC includes former ITER organization leaders (Dr. Timothy Luce served as Head of Science, Controls, and Operations and Chief Scientist at ITER).
• Princeton Plasma Physics Laboratory (PPPL)minorStrategic or Co-development PartnerUS Department of Energy national laboratory. Multiple STAC members have affiliations with PPPL, including Dr. Timothy Luce (who returned as Division Director for Experimental Operations) and Dr. Daniel Andruczyk (who conducted post-doctoral work at PPPL).

Scale indicators12 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Type One Energy: US-based fusion startup developing a stellarator using high-temperature superconducting magnets. Most direct architectural competitor to Renaissance Fusion, pursuing a similar advanced-reactor stellarator approach and competing for the same HTS supply and talent pool.
• Commonwealth Fusion Systems: Spin-out from MIT developing a compact tokamak using HTS magnets (SPARC/ARC). Competes with Renaissance Fusion for HTS tape supply, fusion talent, government funding, and grid-scale fusion customers, even though it uses a tokamak rather than stellarator configuration.
• Tokamak Energy: UK-based fusion company developing a spherical tokamak with HTS magnets. Competes head-to-head with Renaissance Fusion for HTS materials, European engineering talent, and government partnerships in the UK and EU fusion ecosystems.

Broad incumbents

• TAE Technologies: US-based fusion pioneer pursuing field-reversed configuration with HTS magnets. Operates in the same magnetic-confinement fusion space as Renaissance Fusion with broader funding ($1.2B+ raised) but a different plasma confinement approach.
• Helion Energy: US pulsed FRC fusion developer with a Microsoft off-take agreement. Competes with Renaissance Fusion for utility off-take contracts, climate-tech capital, and grid-scale fusion narrative, despite using a different (pulsed, non-stellarator) architecture.
• General Atomics (Fusion Division): US-based fusion operator of the DIII-D tokamak and supplier of fusion technologies. Competes with Renaissance Fusion for government contracts and DOE/national-lab partnerships, and is a potential supplier/partner for HTS coils and fusion components.

Emerging players

• Stellarex: Emerging stellarator-focused fusion startup pursuing simplified stellarator designs. Shares Renaissance Fusion's architectural philosophy (simplified stellarator) but at an earlier funding and team stage, making it a comparable emerging player.

Regional players

• Max Planck Institute for Plasma Physics (IPP, Wendelstein 7-X): German research institute operating Wendelstein 7-X, the world's largest stellarator. While not a commercial competitor, it sets the reference benchmark for stellarator physics that Renaissance Fusion must exceed, and recruits from the same European talent pool.

Others

• Bruker Energy & Supercon: Established manufacturer of superconducting wires, tapes, and materials including HTS conductors. Adjacent supplier/competitor to Renaissance Fusion's in-house HTS tape production, with broader product portfolio and existing utility/customer relationships.
• THEVA: German manufacturer of high-temperature superconducting tape. Directly comparable to Renaissance Fusion's wide-tape HTS ambitions and an alternative supplier to the broader fusion and industrial HTS market Renaissance Fusion targets with its non-fusion revenue stream.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@renaissancefusion9131
• LinkedInlinkedin.com/company/renaissance-fusion
• Xx.com/renfusion

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries1 record

Funding overview

Funding rounds4 records

Investors8 records

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M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Renaissance Fusion