# Top 43 Energy Efficiency Startups in Europe by Funding (2026)

> The 43 best-funded energy efficiency startups in Europe, ranked by total funding raised: $3.0B combined.

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

- 1 [**COX Group** COX Group provides solutions for development and management of water resources as well as services for energy generation and transmission.](https://millionrounds.com/company/cox-group) COX Group provides solutions for development and management of water resources as well as services for energy generation and transmission. *Founded* - Seville, Spain **$2.6B** last round Jan 2026
- 2 [**Bordeaux Métropole Énergies** Bordeaux Métropole Énergies helps the Bordeaux metropolitan area handle the energy transition issue.](https://millionrounds.com/company/bordeaux-metropole-energies) Bordeaux Métropole Énergies helps the Bordeaux metropolitan area handle the energy transition issue. *Founded* - Bordeaux, France **$101M** last round May 2025
- 3 [**Eku Energy** Eku Energy is a globally diversified and technology enabled energy storage business.](https://millionrounds.com/company/eku-energy) Eku Energy is a globally diversified and technology enabled energy storage business. *Founded* 2022 London, United Kingdom **$60M** last round May 2025
- 4 [**Qpinch** Qpinch is a Belgian startup and scale-up focused on industrial energy efficiency and waste heat recovery.](https://millionrounds.com/company/qpinch) Qpinch is a Belgian startup and scale-up focused on industrial energy efficiency and waste heat recovery. *Founded* 2012 Antwerpen, Belgium **$35M** last round May 2024
- 5 [**Gradyent** Gradyent is a Rotterdam-based software company founded in 2019, specializing in Energy Technology and Artificial Intelligence.](https://millionrounds.com/company/gradyent) Gradyent is a Rotterdam-based software company founded in 2019, specializing in Energy Technology and Artificial Intelligence. *Founded* 2019 Rotterdam, Netherlands **$31M** last round Apr 2025
- 6 [**Energy Drive Systems** Energy Drive Systems as a Service, Energy Efficiency](https://millionrounds.com/company/energy-drive-systems) Energy Drive Systems as a Service, Energy Efficiency *Founded* - London, United Kingdom **$27M** last round Jun 2025
- 7 [**Tonik Energy** Tonik Energy was a UK-based renewable electricity and gas supplier founded in 2015 and headquartered in Birmingham.](https://millionrounds.com/company/tonik-energy) Tonik Energy was a UK-based renewable electricity and gas supplier founded in 2015 and headquartered in Birmingham. *Founded* 2015 Birmingham, United Kingdom **$17M** last round Feb 2019
- 8 [**Eddy Grid** Eddy Grid is a Dutch energy technology startup based in Utrecht, founded in 2023.](https://millionrounds.com/company/eddy-grid) Eddy Grid is a Dutch energy technology startup based in Utrecht, founded in 2023. *Founded* 2023 Utrecht, Netherlands **$11M** last round May 2026
- 9 [**Pulsiv** Pulsiv is a UK-based company specializing in power electronics and solar technology.](https://millionrounds.com/company/pulsiv) Pulsiv is a UK-based company specializing in power electronics and solar technology. *Founded* 2013 Milton, United Kingdom **$7.6M** last round Jul 2026
- 10 [**Cenergist** Cenergist is a specialist energy and water efficiency company.](https://millionrounds.com/company/cenergist) Cenergist is a specialist energy and water efficiency company. *Founded* 2012 Washington, United Kingdom **$7.4M** last round May 2022
- 11 [**AirEx Technologies** AirEx Technologies is a climate tech company based in London, UK, focused on addressing climate change and fuel poverty through innovative smart home solutions.](https://millionrounds.com/company/airex-technologies) AirEx Technologies is a climate tech company based in London, UK, focused on addressing climate change and fuel poverty through innovative smart home solutions. *Founded* 2016 London, United Kingdom **$7.1M** last round May 2026
- 12 [**SaveMoneyCutCarbon** SaveMoneyCutCarbon (SMCC) is a UK-based provider of clean technology and sustainability solutions, focused on enhancing energy and water efficiency for business](https://millionrounds.com/company/savemoneycutcarbon) SaveMoneyCutCarbon (SMCC) is a UK-based provider of clean technology and sustainability solutions, focused on enhancing energy and water efficiency for business *Founded* 2010 Bury Saint Edmunds, United Kingdom **$6.3M** last round May 2023
- 13 [**Magnomatics** Magnomatics is a UK-based clean technology company focusing on renewable energy and energy efficiency.](https://millionrounds.com/company/magnomatics) Magnomatics is a UK-based clean technology company focusing on renewable energy and energy efficiency. *Founded* 2006 Sheffield, United Kingdom **$5.7M** last round Oct 2023
- 14 [**Tewke** Tewke is a London-based climate technology and home automation company dedicated to enhancing domestic energy efficiency and simplifying smart-home control.](https://millionrounds.com/company/tewke) Tewke is a London-based climate technology and home automation company dedicated to enhancing domestic energy efficiency and simplifying smart-home control. *Founded* 2019 London, United Kingdom **$5.6M** last round Apr 2026
- 15 [**Measurable.energy** measurable.energy is a UK-based clean-tech and PropTech company that focuses on AI-driven plug load management and energy efficiency solutions for commercial bu](https://millionrounds.com/company/measurable-energy) measurable.energy is a UK-based clean-tech and PropTech company that focuses on AI-driven plug load management and energy efficiency solutions for commercial bu *Founded* 2018 Reading, United Kingdom **$5.2M** last round Aug 2025
- 16 [**viboo** viboo is a Swiss proptech startup founded in 2022, based in Dübendorf, Switzerland.](https://millionrounds.com/company/viboo) viboo is a Swiss proptech startup founded in 2022, based in Dübendorf, Switzerland. *Founded* 2022 Duebendorf, Switzerland **$4.7M** last round Sept 2025
- 17 [**Tribosonics** Tribosonics is a Sheffield-based company founded in 2006 that specializes in ultrasonic and embedded sensing technologies.](https://millionrounds.com/company/tribosonics) Tribosonics is a Sheffield-based company founded in 2006 that specializes in ultrasonic and embedded sensing technologies. *Founded* 2006 Sheffield, United Kingdom **$3.9M** last round Oct 2023
- 18 [**Future Motors** Future Motors aim is to provide businesses with the energy efficient green technologies and secure a strong commercial return on investment.](https://millionrounds.com/company/future-motors) Future Motors aim is to provide businesses with the energy efficient green technologies and secure a strong commercial return on investment. *Founded* 2018 United Kingdom **$3.6M** last round Feb 2024
- 19 [**Furbnow** Furbnow is a home energy efficiency and retrofit company based in Birmingham, England.](https://millionrounds.com/company/furbnow) Furbnow is a home energy efficiency and retrofit company based in Birmingham, England. *Founded* 2022 Birmingham, United Kingdom **$3.6M** last round Jul 2026
- 20 [**Heatio** Heatio provides affordable renewable energy to homeowners.](https://millionrounds.com/company/heatio) Heatio provides affordable renewable energy to homeowners. *Founded* 2022 United Kingdom **$3.5M** last round Jun 2024
- 21 [**TokWise** TokWise is a technology company based in Sofia, Bulgaria, that specializes in software and AI models for renewable energy.](https://millionrounds.com/company/tokwise) TokWise is a technology company based in Sofia, Bulgaria, that specializes in software and AI models for renewable energy. *Founded* 2019 Sofia, Bulgaria **$3.2M** last round Nov 2023
- 22 [**Octopus Lab** Octopus Lab is a French deep tech company focused on predictive software solutions that improve indoor air quality (IAQ), energy efficiency, and environmental s](https://millionrounds.com/company/octopus-lab) Octopus Lab is a French deep tech company focused on predictive software solutions that improve indoor air quality (IAQ), energy efficiency, and environmental s *Founded* 2017 La Madeleine, France **$3.1M** last round Jul 2022
- 23 [**UniSCool** UniSCool is an IT consulting firm that offers energy efficiency, sustainability, heat transfer, and thermal management services.](https://millionrounds.com/company/uniscool) UniSCool is an IT consulting firm that offers energy efficiency, sustainability, heat transfer, and thermal management services. *Founded* - Lleida, Spain **$3.0M** last round Feb 2026
- 24 [**Vibrant Energy** A green energy provider developing high-efficiency solar power plants to supply electricity to commercial & industrial customers](https://millionrounds.com/company/vibrant-energy) A green energy provider developing high-efficiency solar power plants to supply electricity to commercial & industrial customers *Founded* 2015 Hyderabad, United Kingdom **$2.9M** last round Jun 2008
- 25 [**Snugg** Snugg is working on a platform to assist homeowners in identifying, financing, and implementing energy efficiency upgrades in their houses.](https://millionrounds.com/company/snugg) Snugg is working on a platform to assist homeowners in identifying, financing, and implementing energy efficiency upgrades in their houses. *Founded* 2022 Edinburgh, United Kingdom **$2.5M** last round Jan 2024
- 26 [**Ecomer data** ECOMER Data is a software company established in 2024 as a subsidiary of the Francbord Group.](https://millionrounds.com/company/ecomer-data) ECOMER Data is a software company established in 2024 as a subsidiary of the Francbord Group. *Founded* - Nantes, France **$2.3M** last round May 2025
- 27 [**Nextgen Nano** Breakthrough technology replaces existing solutions with biopolymers to develop solar cells that produce energy with unrivalled efficiency.](https://millionrounds.com/company/nextgen-nano) Breakthrough technology replaces existing solutions with biopolymers to develop solar cells that produce energy with unrivalled efficiency. *Founded* 2017 United Kingdom **$2.2M** last round Jan 2025
- 28 [**Neuville Grid Data** Neuville Grid Data is a UK-based energy-tech company focused on enhancing power grid stability and efficiency.](https://millionrounds.com/company/neuville-grid-data) Neuville Grid Data is a UK-based energy-tech company focused on enhancing power grid stability and efficiency. *Founded* 2017 London, United Kingdom **$2.0M** last round Dec 2024
- 29 [**FuelSave** FuelSave is a disruptive energy efficiency enhancement company that provides innovative solutions.](https://millionrounds.com/company/fuelsave) FuelSave is a disruptive energy efficiency enhancement company that provides innovative solutions. *Founded* 2012 Walldorf, Germany **$1.6M** last round Jun 2022
- 30 [**Fifty Energy** Fifty Energy is a Swedish clean energy technology company founded in 2023, based in Åre.](https://millionrounds.com/company/fifty-energy) Fifty Energy is a Swedish clean energy technology company founded in 2023, based in Åre. *Founded* 2023 Are, Sweden **$1.6M** last round Aug 2025
- 31 [**JFS Howla Hay Biogas** Howla Hay Farm is a 200 acre site, situated near to Guisborough](https://millionrounds.com/company/jfs-howla-hay-biogas) Howla Hay Farm is a 200 acre site, situated near to Guisborough *Founded* 2012 United Kingdom **$1.2M** last round Mar 2013
- 32 [**Protio** Protio is a digital PropTech platform based in Athens, Greece, focused on real estate renovation, energy efficiency upgrades, and property investment.](https://millionrounds.com/company/protio) Protio is a digital PropTech platform based in Athens, Greece, focused on real estate renovation, energy efficiency upgrades, and property investment. *Founded* 2021 Athens, Greece **$1.1M** last round May 2025
- 33 [**Pydro** PYDRO GmbH is a German cleantech startup founded in 2016, headquartered in Rostock, with an additional location in Hamburg.](https://millionrounds.com/company/pydro) PYDRO GmbH is a German cleantech startup founded in 2016, headquartered in Rostock, with an additional location in Hamburg. *Founded* 2016 Rostock, Germany **$1.1M** last round May 2025
- 34 [**NOX Energy** NOX Energy is a Belgian-American startup founded in 2024, dedicated to enhancing energy efficiency by connecting devices like heat pumps to electricity markets.](https://millionrounds.com/company/nox-energy) NOX Energy is a Belgian-American startup founded in 2024, dedicated to enhancing energy efficiency by connecting devices like heat pumps to electricity markets. *Founded* 2024 Antwerp, Belgium **$1.0M** last round Dec 2024
- 35 [**Pipeline Organics** Pipeline Organics is a cleantech startup based in Nottingham, UK, founded in 2021.](https://millionrounds.com/company/pipeline-organics) Pipeline Organics is a cleantech startup based in Nottingham, UK, founded in 2021. *Founded* 2021 Nottingham, United Kingdom **$1.0M** last round Aug 2024
- 36 [**VASS Technologies** VASS Technologies is an Italian construction and building-tech company specializing in high-efficiency roofing solutions.](https://millionrounds.com/company/vass-technologies) VASS Technologies is an Italian construction and building-tech company specializing in high-efficiency roofing solutions. *Founded* 2012 Carmagnola, Italy **$780K** last round Oct 2012
- 37 [**Flint Engineering** Flint Engineering is dedicated to providing sustainable energy efficiency solutions.](https://millionrounds.com/company/flint-engineering) Flint Engineering is dedicated to providing sustainable energy efficiency solutions. *Founded* 2012 Hailsham, United Kingdom **$689K** last round Feb 2024
- 38 [**QwikSense** QwikSense is a Netherlands-based company that specializes in workplace environment analytics and smart building monitoring.](https://millionrounds.com/company/qwiksense) QwikSense is a Netherlands-based company that specializes in workplace environment analytics and smart building monitoring. *Founded* 2014 Bussum, Netherlands **$291K** last round May 2015
- 39 [**bettervest GmbH** bettervest GmbH is a German crowd-investing and crowdlending platform based in Frankfurt am Main, founded in 2012.](https://millionrounds.com/company/bettervest-gmbh) bettervest GmbH is a German crowd-investing and crowdlending platform based in Frankfurt am Main, founded in 2012. *Founded* 2012 Frankfurt, Germany **$229K** last round Aug 2024
- 40 [**HyWaves** HyWaves is a clean technology company founded in 2022, focused on making green hydrogen more accessible and affordable.](https://millionrounds.com/company/hywaves) HyWaves is a clean technology company founded in 2022, focused on making green hydrogen more accessible and affordable. *Founded* - Cranfield, United Kingdom **$140K** last round Jun 2024
- 41 [**Kestrix** Kestrix is a climate technology and energy efficiency startup founded in 2022 by Lucy Lyons and Matt Goodridge.](https://millionrounds.com/company/kestrix) Kestrix is a climate technology and energy efficiency startup founded in 2022 by Lucy Lyons and Matt Goodridge. *Founded* 1991 London, United Kingdom **$136K** last round Jun 2025
- 42 [**Lightricity** We enable a scalable and sustainable IoT by providing the world’s highest efficiency light energy harvesting technology](https://millionrounds.com/company/lightricity) We enable a scalable and sustainable IoT by providing the world’s highest efficiency light energy harvesting technology *Founded* 2017 Oxford, United Kingdom **$62K** last round Jun 2023
- 43 [**EINBLIQ.IO** EINBLIQ.IO helps media companies to reliably deliver excellent video streaming services at lower cost while optimizing for energy efficiency](https://millionrounds.com/company/einbliq-io) EINBLIQ.IO helps media companies to reliably deliver excellent video streaming services at lower cost while optimizing for energy efficiency *Founded* 2021 Munich, Germany **$50K** last round Feb 2023

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose own description names this theme, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

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## More energy efficiency lists

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[*CG* *UA* *PP* **Energy efficiency startups worldwide** 134 companies · $5.1B](https://millionrounds.com/top-lists/energy-efficiency-startups)

## More lists for Europe

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

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