Best Energy Companies in Paris, France
The 120 best Energy companies in Paris, France in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Newcleo.
Our analysis of 441 Energy companies
$135.1b in tracked funding; 76% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy companies in Paris
| # | Company | Disclosed funding | Last round | Employees | Founded | Founder | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Newcleo 🦄 Provider of advanced nuclear energy technologies, focused on designing, building, and operating small modular… | $685M | 4 mo ago | 430 | 2021 | Luciano Cinotti Co-Founder & CSO | 7 patents Advanced nuclear reactor core support, control rod integration, and multi‑actuation safety systems | 1 partnership |
| 2 | Solairedirect Solar IPP and EPC company | $341M | 111 mo ago | 200 | 2006 | Jean Pascal Pham Ba Co-Founder | 2 patents Waterproof, ventilated mounting structures for building-integrated photovoltaic panels. | — |
| 3 | NW Group Developer of solar and wind energy projects | $317M | 47 mo ago | 27 | 2007 | Jean-Christophe Kerdelhue Founder & CEO | — | — |
| 4 | Kyotherm Provider of turnkey financing for industrial decarbonization projects | $309M | 1 mo ago | 9 | 2011 | — | — | — |
| 5 | Voltalia Provider of independent power producer using renewable energy sources | $180M | 65 mo ago | 1,444 | 2005 | Benoit Kuciel Chief of Staff to the CEO | — | 1 partnership |
| 6 | ZE Energy Independent solar power producer | $108M | 19 mo ago | 36 | 2018 | Mathieu Lassagne CEO | 29 patents Battery regeneration diagnostics, safe battery workstations, and oil decontamination technologies | 1 partnership |
| 7 | Akuo Energy Renewable Energy developer | $94M | 68 mo ago | 18 | 2007 | — | 2 patents Integrated water collection systems for photovoltaic solar panels | 1 job opening · 2 expansions |
| 8 | Smart Energies Provider of renewable energy production through development, financing, construction, and operation of energy… | $94M | 24 mo ago | 51 | 2012 | Vianney l Estang CEO | — | — |
| 9 | NAAREA Developer of nuclear energy project | $66M | 30 mo ago | 140 | 2021 | Ivan Gavriloff Co-Founder | 25 patents Patents concentrated in computing, sensing & instrumentation | — |
| 10 | NEoT Infrastructure fund focused on renewable energy investments | $64M | 25 mo ago | 22 | 2016 | Tomoaki Okubo Deputy CEO | — | 1 partnership |
| 11 | Enersweet Enersweet is a group specializing in energy efficiency services for businesses and communities. | $51M | 3 mo ago | — | 2022 | Felix Lenglart Partner & Investment Director | — | — |
| 12 | Volta Group Developer of solar and wind energy projects | $42M | 32 mo ago | 40 | 2018 | — | 2 patents Wall-mounted cable guiding systems for organized electrical installations | 1 expansion |
| 13 | Neoen Independent power producer in solar wind and biomass | $28M | 72 mo ago | 169 | 2008 | Jacques Veyrat Founder | — | 3 expansions |
| 14 | Engie Provider of electricity generation and other energy services | $27M | 27 mo ago | 96,454 | 2008 | Catherine Macgregor CEO | 668 patents Advanced gas sampling, measurement, liquefaction, and biogas conditioning technologies. | — |
| 15 | TUCO ENERGIE Developer of solar energy projects | $17M | 64 mo ago | 40 | 2009 | — | — | — |
| 16 | TotalEnergies Energy company that produces and markets a range of energy products and services | $16M | 35 mo ago | 280 | 2017 | Nicolas Falier Product Owner | 156 patents Patents concentrated in computing, sensing & instrumentation | — |
| 17 | Solstyce Turnkey solar solutions provider | $16M | 57 mo ago | 106 | 2009 | David Guillaume Co-Founder & President | — | 1 award |
| 18 | Selfee Provider of renewable electricity consumption services | $14M | 38 mo ago | 6 | 2017 | Sandra Magnin Co-Founder | — | 2 job openings |
| 19 | Sublime Energie Limited information available | $13M | 27 mo ago | 8 | 2019 | Bruno Adhemar Co-Founder | — | — |
| 20 | Hynamics Developer of hydro power projects | $12M | 59 mo ago | 125 | 2019 | Christelle Rouillé CEO | — | — |
| 21 | Bionersis Limited information available | $10M | 190 mo ago | 3 | 2005 | Nicolas Heuzé CEO | — | — |
| 22 | Ecoslops Developer of micro-refining technology for oil residue recycling | $7M | 55 mo ago | 54 | 2009 | Vincent Favier CEO | — | 1 internship |
| 23 | PowerUp Provider of battery analytics solutions | $6M | 65 mo ago | 37 | 2017 | Benjamin Delaille Co-Founder | 20 patents Battery health monitoring and lifespan estimation for lithium‑ion energy storage systems | — |
| 24 | Aqylon Provider of web hosting and email services | $5M | 114 mo ago | 15 | 2009 | Pierre Convert Co-Founder & CEO | 21 patents Advanced Rankine-cycle thermodynamic systems and torque transmission devices for turbines/compressors | — |
| 25 | Enhywhere Provider of refueling stations to accelerate hydrogen mobility deployment | $5M | 42 mo ago | — | 2021 | Hechem Nadjar Co-Founder & CEO | — | — |
| 26 | Methaneo Manufacturer of high-quality paper products and thermal rolls | $4M | 211 mo ago | 9 | 2007 | Yann Mercier Co-Founder & CEO | 11 patents Anaerobic digestion substrate preparation systems with mobile roof and associated processes | — |
| 27 | Ensol Provider of solar installation services for homes | $3M | 31 mo ago | — | 2023 | Martin d'Hoffschmidt Co-Founder | — | — |
| 28 | Weole Energy Wind Turbines and Energy | $3M | 210 mo ago | — | 2007 | — | — | — |
| 29 | GreenFlex Offers audit, consulting and operational advice to renewable energy sector | $2M | 65 mo ago | 550 | 2009 | — | — | 1 award |
| 30 | Highcast Delivers live and on-demand youth sporting events to players, coaches, families, and fans | $2M | 20 mo ago | — | 2021 | Flore Lasteyrie Co-Founder | — | 1 job opening · 2 internships · 1 launch |
| 31 | Nanoé Developer of solar energy projects | $770K | 55 mo ago | — | 2016 | Nicolas Co-Founder | 77 patents Real-time data stream analytics and traffic management for biomedical sensor information | — |
| 32 | GRDF Provider of natural gas distribution and energy control services | $735K | 59 mo ago | 156 | 2008 | Laurence Poirier-Dietz Managing Director | 160 patents Gas distribution infrastructure: valve operation tools and pipeline plugging/repair technologies. | 1 partnership · 1 expansion |
| 33 | Propellane Developer of waste heat recovery systems for industrial processes | $20K | 36 mo ago | — | — | Christophe Poncelet CEO | 8 patents Dual‑storage heat pump technology for enhanced thermal energy management | — |
| 34 | TotalEnergies Integrated energy company producing and marketing energy sources | — | 29 mo ago | 105,476 105,476 → 86,710 (-18%) | 1924 | Dierk Paskert Director | 156 patents Patents concentrated in computing, sensing & instrumentation | — |
| 35 | EnergieSprong Platform that enables the retrofitting of residential buildings to achieve near-zero energy consumption… | — | 41 mo ago | — | 2012 | Thibault Perraillon Co-Founder | — | — |
| 36 | International Energy Agency Global organization shaping energy policies for a secure and sustainable future | — | 59 mo ago | 791 | 1974 | — | — | 1 partnership |
Top 12 Energy companies in Paris
#1
Newcleo 🦄Series B · Paris, Ile de France · founded 2021 · 430 employees$684.8Mraised▾
Provider of advanced nuclear energy technologies, focused on designing, building, and operating small modular lead-cooled fast reactors. The company focuses on small modular reactors that recycle nuclear waste into fuel, closing the fuel cycle for sustainable power. The reactors use liquid lead cooling and fast neutron flux to avoid long-lived radioactive waste like plutonium and reduce the need for geological storage.
- Feb 2026Series B$85M
- Sep 2024Series B$151M
- May 2024Series B$109.4M
- Mar 2023Series B—
#2
Series C · Paris, Ile de France · founded 2011 · 9 employees$309.3Mraised▾
Provider of turnkey financing for industrial decarbonization projects. It finances the entire investment cost through heat supply or energy performance contracts. The company participates in the co-development of decarbonization projects, leveraging technical, contractual, and financial expertise. This allows energy consumers to outsource operational risks and focus on their core business. Financing is offered for projects up to a certain investment amount, with contracts ranging from seven to twenty-five years. Collaboration with energy service companies and project developers ensures a turnkey solution encompassing design, construction, operation, maintenance, and financing.
- Apr 2026Conventional Debt$234.6M
- Mar 2022Series C$49.2M
- Apr 2019Series B$20.3M
- Jul 2016Series A$5.3M
#3
Series C · Paris, Ile de France · founded 2022$51.4Mraised▾
Enersweet is a group specializing in energy efficiency services for businesses and communities. They recently acquired LICIEL Environnement, a leading provider of software solutions for property. Enersweet is focused on the energy transition and offers services related to energy efficiency.
- Mar 2026Series C$51.4M
#4
Series C · Paris, Ile de France · founded 2018 · 36 employees$108.4Mraised▾
Independent solar power producer
- Nov 2024Series C$58.9M
- Nov 2021Series B$45.1M
- Jun 2020Series A$4.5M
#5
Series C · Paris, Ile de France · founded 2012 · 51 employees$93.8Mraised▾
Smart Energies is an active participant in energy transition, focusing on developing, financing, constructing, and operating renewable energy production sites.
- Jun 2024Series C$93.8M
#6
Series C · Paris, Ile de France · founded 2016 · 22 employees$64.2Mraised▾
Infrastructure fund focused on renewable energy investments
- Apr 2024Series C$64.2M
- Sep 2021Series B—
#7
Series D · Paris, Ile de France · founded 2007 · 27 employees$316.6Mraised▾
NW Groupe is a company focused on developing solutions for renewable energy and electric vehicles, including high-power charging stations and distributed electricity storage units. Their innovative technologies aim to contribute to the transition towards sustainable energy practices.
- Jun 2022Series D$316.6M
#8
Series C · Paris, Ile de France · founded 2021 · 140 employees$65.8Mraised▾
Developer of nuclear energy project
- Nov 2023Series C$65.8M
#9
Public · Paris, Ile de France · founded 2008 · 96454 employees$27.2Mraised▾
Provider of electricity generation and other energy services. It is a global energy actor and expert in electricity, natural gas, and energy services. The company provides access to sustainable energy, mitigation, and adaptation to climate change, the security of supply and rational use of resources. It also offers tailored energy services to sectors such as cities, industries, tertiary businesses, and individuals to support zero-carbon targets and energy efficiency. In 2022, the company recorded annual revenues of $98.65B and a net profit of $0.23B.
- Feb 2024Post IPO—
- Nov 2023Grant (prize money)$371.7K
- Dec 2021Grant (prize money)$3.2M
- Sep 2021Grant (prize money)$408K
#10
Late Stage · Paris, Ile de France · founded 2018 · 40 employees$42.1Mraised▾
Developer of solar and wind energy projects
- Oct 2023Unattributed$42.1M
#11
Seed · Paris, Ile de France · founded 2021$2.2Mraised▾
HiCast Sports Network is a platform that delivers live and on-demand youth sporting events to players, coaches, families, and fans. It allows users to save and share content instantly.
- Oct 2024Seed$2.2M
#12
Acquired · Paris, Ile de France · founded 2006 · 200 employees$340.9Mraised▾
Solairedirect owns and operates solar farms as well as undertakes solar EPC contracts. The company has presence in France, India, America, Latin America among other countries. Solairedirect also has a Investment management division which manages the percent stakes in their developed solar assets.
- Feb 2017Conventional Debt$100.6M
- Jan 2014Series D$227.6M
- Jan 2014Conventional Debt$51.7M
- Jun 2013Series C$80.3M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Energy Storage in Paris is moving
A read on the academic research around Energy Storage in Paris — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 73 papers.
Université Paris-Saclay and allied Paris labs dominantly advance battery technologies and microgrid optimization across 73 papers, with a cautiously optimistic tone (mean stance 0.49, breakthroughs outpacing concerns).
- Université Paris-Saclay22
- Laboratoire de Génie Électrique et Électronique de Paris6
- Université Paris Cité6
- ESPCI Paris5
- Université Paris-Est Créteil5
- Dielectric4
- Electricity3
- Photovoltaic system3
- Microgrid3
- Energy management3
- Composite material1→5
- Dielectric1→4
- Microgrid1→3
- Photovoltaic system1→3
- Electrolyte3
- Wind power2
- Renewable energy2
- Battery (electricity)2
- Aqueous solution2
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.