# Top 50 Clean Energy Startups in Europe by Funding (2026)

> The 50 best-funded clean energy startups in Europe, ranked by total funding raised: $23B combined. With founding year, headquarters and each company's rounds.

Source: https://millionrounds.com/top-lists/clean-energy-startups-europe (Millionrounds; every figure on the page links to its filing or article)

- 1 [**SSE**](https://millionrounds.com/company/sse) *Founded* 1998 Perth, United Kingdom **$2.7B** last round Jun 2026
- 2 [**Eni Plenitude** Eni Plenitude supplies energy for homes and institutions.](https://millionrounds.com/company/eni-plenitude) Eni Plenitude supplies energy for homes and institutions. *Founded* 2017 San Donato Milanese, Italy **$2.3B** last round Jun 2025
- 3 [**Stegra** Stegra operates a steel production plant to accelerate the decarbonization of the steel industry using green energy.](https://millionrounds.com/company/stegra) Stegra operates a steel production plant to accelerate the decarbonization of the steel industry using green energy. *Founded* 2020 Stockholm, Sweden **$1.6B** last round Apr 2026
- 4 [**Return**](https://millionrounds.com/company/return) *Founded* - Netherlands **$1.3B** last round Nov 2026
- 5 [**Enpal** Enpal is a photovoltaics leasing firm that provides solar power systems for homeowners.](https://millionrounds.com/company/enpal) Enpal is a photovoltaics leasing firm that provides solar power systems for homeowners. *Founded* 2017 Berlin, Germany **$1.0B** last round Oct 2025
- 6 [**CuspAI** CuspAI is an innovative artificial intelligence company based in Cambridge, United Kingdom, with additional teams in Amsterdam and Berlin.](https://millionrounds.com/company/cuspai) CuspAI is an innovative artificial intelligence company based in Cambridge, United Kingdom, with additional teams in Amsterdam and Berlin. *Founded* 2024 Cambridge, United Kingdom **$950M** last round Jul 2026
- 7 [**Rezolv Energy** Rezolv Energy is an independent power producer and renewable energy developer based in Prague, Czech Republic.](https://millionrounds.com/company/rezolv-energy) Rezolv Energy is an independent power producer and renewable energy developer based in Prague, Czech Republic. *Founded* 2022 Prague, Romania **$763M** last round Nov 2026
- 8 [**BNZ energy** BNZ, an independent power producer (IPP), plans, installs, and runs solar photovoltaic projects.](https://millionrounds.com/company/bnz-energy) BNZ, an independent power producer (IPP), plans, installs, and runs solar photovoltaic projects. *Founded* 2020 Madrid, Spain **$740M** last round Oct 2024
- 9 [**Octopus Energy Group** Octopus Energy Group is an England-based holding company that operates businesses in areas such as energy generation and electric vehicle sales.](https://millionrounds.com/company/octopus-energy-group) Octopus Energy Group is an England-based holding company that operates businesses in areas such as energy generation and electric vehicle sales. *Founded* 2016 London, United Kingdom **$681M** last round Dec 2025
- 10 [**Proxima Fusion** Proxima Fusion is a European fusion energy company based in Munich, Germany, founded in 2023 as the first spin-out from the Max Planck Institute for Plasma Physics.](https://millionrounds.com/company/proxima-fusion) Proxima Fusion is a European fusion energy company based in Munich, Germany, founded in 2023 as the first spin-out from the Max Planck Institute for Plasma Physics. *Founded* 2023 Munich, Germany **$636M** last round Jul 2026
- 11 [**GIGA Storage** GIGA Storage develops large-scale sustainable energy storage systems.](https://millionrounds.com/company/giga-storage) GIGA Storage develops large-scale sustainable energy storage systems. *Founded* 2018 Amstelveen, Netherlands **$634M** last round Oct 2026
- 12 [**1KOMMA5°** 1Komma5° is an electricity company offering free electricity to all electric vehicle owners financed through trading using GHG quotas.](https://millionrounds.com/company/1komma5) 1Komma5° is an electricity company offering free electricity to all electric vehicle owners financed through trading using GHG quotas. *Founded* 2021 Hamburg, Germany **$563M** last round Oct 2026
- 13 [**Newcleo** Newcleo is an atomic energy company that focuses on developing advanced nuclear energy technologies.](https://millionrounds.com/company/newcleo) Newcleo is an atomic energy company that focuses on developing advanced nuclear energy technologies. *Founded* 2021 Paris, United Kingdom **$563M** last round Sept 2026
- 14 [**Ellevio** Ellevio is a Swedish energy provider.](https://millionrounds.com/company/ellevio) Ellevio is a Swedish energy provider. *Founded* 2015 Stockholm, Sweden **$555M** last round May 2025
- 15 [**ILOS Projects** ILOS Projects is a Independent Power Producer.](https://millionrounds.com/company/ilos-projects) ILOS Projects is a Independent Power Producer. *Founded* 2018 Karlsruhe, Germany **$530M** last round Apr 2026
- 16 [**Zenobē**](https://millionrounds.com/company/zenobe) *Founded* - United Kingdom **$382M** last round Jul 2025
- 17 [**Fever**](https://millionrounds.com/company/fever) *Founded* - Sweden **$359M** last round Sept 2026
- 18 [**Zelestra** At Zelestra, we are on a mission to change the world by making decarbonization a reality for our partners.](https://millionrounds.com/company/zelestra) At Zelestra, we are on a mission to change the world by making decarbonization a reality for our partners. *Founded* 2005 Spain, Spain **$350M** last round Oct 2026
- 19 [**Beta Renewables** Beta Renewables is a biofuels and biochemical company.](https://millionrounds.com/company/beta-renewables) Beta Renewables is a biofuels and biochemical company. *Founded* 2011 Tortona, Italy **$344M** last round Oct 2011
- 20 [**Atrato Onsite Energy** Atrato Onsite Energy is a commercial rooftop solar funder.](https://millionrounds.com/company/atrato-onsite-energy) Atrato Onsite Energy is a commercial rooftop solar funder. *Founded* - London, United Kingdom **$327M** last round Apr 2025
- 21 [**Sunfire** Sunfire GmbH is an industrial electrolysis company based in Dresden, Germany, founded in 2010 by Nils Aldag.](https://millionrounds.com/company/sunfire) Sunfire GmbH is an industrial electrolysis company based in Dresden, Germany, founded in 2010 by Nils Aldag. *Founded* 2010 Dresden, Germany **$281M** last round Mar 2024
- 22 [**Focused Energy** Focused Energy is a German-American deep-tech startup founded in 2021, specializing in laser-driven inertial confinement fusion (ICF).](https://millionrounds.com/company/focused-energy) Focused Energy is a German-American deep-tech startup founded in 2021, specializing in laser-driven inertial confinement fusion (ICF). *Founded* 2021 Darmstadt, Germany **$280M** last round Jun 2026
- 23 [**Skeleton Technologies** Skeleton Technologies is a global leader in cleantech and the largest manufacturer of advanced energy storage solutions, focusing on ultracapacitors and high-po](https://millionrounds.com/company/skeleton-technologies) Skeleton Technologies is a global leader in cleantech and the largest manufacturer of advanced energy storage solutions, focusing on ultracapacitors and high-po *Founded* 2009 Tallinn, Estonia **$274M** last round Oct 2026
- 24 [**Ichthion** Ichthion engaged in Development of cutting-edge technology to restore the ocean environment.](https://millionrounds.com/company/ichthion) Ichthion engaged in Development of cutting-edge technology to restore the ocean environment. *Founded* 2017 United Kingdom **$271M** last round Jan 2024
- 25 [**Field** Field is Strava for football, tennis and padel.](https://millionrounds.com/company/field) Field is Strava for football, tennis and padel. *Founded* 2019 United Kingdom **$265M** last round Sept 2024
- 26 [**terralayr**](https://millionrounds.com/company/terralayr) *Founded* - Switzerland **$257M** last round Jan 2026
- 27 [**HoloSolis** Holosolis contributes to the EU’s goal of local PV module production and curbing global warming.](https://millionrounds.com/company/holosolis) Holosolis contributes to the EU’s goal of local PV module production and curbing global warming. *Founded* 2023 Paris, France **$255M** last round Nov 2025
- 28 [**DRIVECO** DRIVECO offers a charging station for electric vehicles](https://millionrounds.com/company/driveco) DRIVECO offers a charging station for electric vehicles *Founded* 2010 Paris, France **$250M** last round May 2023
- 29 [**AMPYR Distributed Energy** AMPYR Distributed Energy designs, constructs, owns, and operates sustainable energy technology.](https://millionrounds.com/company/ampyr-distributed-energy) AMPYR Distributed Energy designs, constructs, owns, and operates sustainable energy technology. *Founded* - London, United Kingdom **$229M** last round May 2025
- 30 [**Sunprime** Sunprime is a fast-growing Independent Power Producer based in Italy focused on Solar C&I, and smart homes segments.](https://millionrounds.com/company/sunprime) Sunprime is a fast-growing Independent Power Producer based in Italy focused on Solar C&I, and smart homes segments. *Founded* 2020 Milano, Italy **$221M** last round Jul 2024
- 31 [**Svea Solar** Svea Solar is digitalising energy.](https://millionrounds.com/company/svea-solar) Svea Solar is digitalising energy. *Founded* - Sollentuna, Sweden **$216M** last round Jun 2026
- 32 [**EVC** EVC's core focus is on providing convenient, practical and reliable 'destination' charging options for its growing customer base](https://millionrounds.com/company/evc) EVC's core focus is on providing convenient, practical and reliable 'destination' charging options for its growing customer base *Founded* 2020 United Kingdom **$199M** last round Feb 2023
- 33 [**GeoPura** GeoPura is enabling the production, transport, and use of zero-emissions fuels with innovative and commercially viable technology.](https://millionrounds.com/company/geopura) GeoPura is enabling the production, transport, and use of zero-emissions fuels with innovative and commercially viable technology. *Founded* 2019 Wysall, United Kingdom **$194M** last round Aug 2026
- 34 [**Green Genius**](https://millionrounds.com/company/green-genius) *Founded* - Lithuania **$183M** last round Nov 2026
- 35 [**Power Dot** Power Dot is a public EV destination charging infrastructure operator](https://millionrounds.com/company/power-dot) Power Dot is a public EV destination charging infrastructure operator *Founded* 2018 Lisbon, Portugal **$180M** last round Aug 2024
- 36 [**Aira**](https://millionrounds.com/company/aira) *Founded* - Sweden **$174M** last round Aug 2025
- 37 [**Highview Power** Highview Power is a renewable energy company that develops liquid-air energy storage solutions for grid applications.](https://millionrounds.com/company/highview-power) Highview Power is a renewable energy company that develops liquid-air energy storage solutions for grid applications. *Founded* 2005 London, United Kingdom **$171M** last round Nov 2025
- 38 [**Ampergia** Ampergia Limited is a UK-based renewable energy company founded in 2021 by Sandip Sali.](https://millionrounds.com/company/ampergia) Ampergia Limited is a UK-based renewable energy company founded in 2021 by Sandip Sali. *Founded* 2021 Milton Keynes, United Kingdom **$168M** last round Jan 2022
- 39 [**First Light Fusion** First Light Fusion is a British company based in Oxfordshire, focused on developing innovative solutions for fusion energy through inertial confinement.](https://millionrounds.com/company/first-light-fusion) First Light Fusion is a British company based in Oxfordshire, focused on developing innovative solutions for fusion energy through inertial confinement. *Founded* 2011 Yarnton, United Kingdom **$167M** last round Apr 2026
- 40 [**BBOXX** Bboxx manufactures plug and play solar systems.](https://millionrounds.com/company/bboxx) Bboxx manufactures plug and play solar systems. *Founded* 2010 London, United Kingdom **$167M** last round Apr 2025
- 41 [**Mainstream Renewable Power** Mainstream Renewable Energy provides project design and management services for renewable and alternative energies.](https://millionrounds.com/company/mainstream-renewable-power) Mainstream Renewable Energy provides project design and management services for renewable and alternative energies. *Founded* 2008 Dublin, Ireland **$159M** last round Aug 2013
- 42 [**Fastned** Fastned is a fast-charging network for electric vehicles to charge with renewable energy from the sun and wind.](https://millionrounds.com/company/fastned) Fastned is a fast-charging network for electric vehicles to charge with renewable energy from the sun and wind. *Founded* 2012 Amsterdam, Netherlands **$159M** last round Jan 2026
- 43 [**sonnen** Sonnen is a pioneer for intelligent lithium based energy storage.](https://millionrounds.com/company/sonnen) Sonnen is a pioneer for intelligent lithium based energy storage. *Founded* 2010 Wildpoldsried, Germany **$155M** last round May 2018
- 44 [**Heliatek** Heliatek is a German technology company based in Dresden, focused on developing and producing lightweight, flexible organic photovoltaic (OPV) solar films.](https://millionrounds.com/company/heliatek) Heliatek is a German technology company based in Dresden, focused on developing and producing lightweight, flexible organic photovoltaic (OPV) solar films. *Founded* 2006 Dresden, Germany **$153M** last round Oct 2017
- 45 [**Artic Energy**](https://millionrounds.com/company/artic-energy) *Founded* - Iceland **$150M** last round Apr 2018
- 46 [**UrbanVolt** Urban Volt is an energy services company that provides energy-efficient lighting solutions to commercial and industrial clients.](https://millionrounds.com/company/urbanvolt) Urban Volt is an energy services company that provides energy-efficient lighting solutions to commercial and industrial clients. *Founded* 2015 Dublin, Ireland **$144M** last round May 2025
- 47 [**Mytrah Energy** Mytrah Energy (India) Limited (MEIL), a wholly owned subsidiary of Guernsey based and AIM/LSE listed MEL in India,](https://millionrounds.com/company/mytrah-energy) Mytrah Energy (India) Limited (MEIL), a wholly owned subsidiary of Guernsey based and AIM/LSE listed MEL in India, *Founded* 2009 Hyderabad, United Kingdom **$130M** last round Apr 2015
- 48 [**Sonnedix** Sonnedix Solar is a global power producer dedicated to produce low-carbon solar energy for the future.](https://millionrounds.com/company/sonnedix) Sonnedix Solar is a global power producer dedicated to produce low-carbon solar energy for the future. *Founded* 2009 London, France **$124M** last round Jan 2014
- 49 [**Connected Kerb** Connected Kerb Limited is an electric vehicle (EV) infrastructure company based in London, UK, founded in 2017.](https://millionrounds.com/company/connected-kerb) Connected Kerb Limited is an electric vehicle (EV) infrastructure company based in London, UK, founded in 2017. *Founded* 2017 London, United Kingdom **$123M** last round Jan 2025
- 50 [**WAAT** Opérateur français de bornes de recharge ⚡ Copropriété • Bailleurs sociaux • Immobilier Tertiaire • Entreprises Lauréat 2026 French Tech 120 🐓 Ecovadis 2025 Méd](https://millionrounds.com/company/waat) Opérateur français de bornes de recharge ⚡ Copropriété • Bailleurs sociaux • Immobilier Tertiaire • Entreprises Lauréat 2026 French Tech 120 🐓 Ecovadis 2025 Méd *Founded* 2018 Malakoff, France **$118M** last round Sept 2025

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose funding rounds we classed as this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

## Who backed them?

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## More clean energy lists

[See all](https://millionrounds.com/top-lists?t=Clean%20energy)

[*C* *AR* *S* **Clean energy startups worldwide** 1,284 companies · $64B](https://millionrounds.com/top-lists/clean-energy-startups)

## More lists for Europe

[See all](https://millionrounds.com/top-lists?r=Europe)

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