# Top 19 Energy Startups in Spain by Funding (2026)

> The 19 best-funded energy startups in Spain, ranked by total funding raised: $4.1B combined. With founding year, headquarters and each company's rounds.

Source: https://millionrounds.com/top-lists/energy-startups-spain (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 [**Global Power Generation** Global Power Generation is an electricity energy generation business company.](https://millionrounds.com/company/global-power-generation) Global Power Generation is an electricity energy generation business company. *Founded* 2014 Canberra, Spain **$1.5B** last round Dec 2024
- 3 [**Matteco** Matteco is a materials technology company based in Valencia (Paterna), Spain, founded in 2023.](https://millionrounds.com/company/matteco) Matteco is a materials technology company based in Valencia (Paterna), Spain, founded in 2023. *Founded* 2023 Paterna, Spain **$16M** last round Oct 2024
- 4 [**Green Bunkers** Green Bunkers provides a digital bunkering platform linking shipowners with fuel suppliers and carbon tools.](https://millionrounds.com/company/green-bunkers) Green Bunkers provides a digital bunkering platform linking shipowners with fuel suppliers and carbon tools. *Founded* - Alcobendas, Spain **$5.9M** last round Sept 2025
- 5 [**H2SITE** H2SITE produces onsite and renewable H2 for small and medium companies.](https://millionrounds.com/company/h2site) H2SITE produces onsite and renewable H2 for small and medium companies. *Founded* 2019 Spain **$3.9M** last round Sept 2026
- 6 [**Clevergy** Clevergy is a climate-tech startup based in Madrid, Spain, founded in 2021.](https://millionrounds.com/company/clevergy) Clevergy is a climate-tech startup based in Madrid, Spain, founded in 2021. *Founded* 2021 Madrid, Spain **$3.7M** last round Oct 2025
- 7 [**Energiot** Energiot is a Barcelona-based technology startup founded in 2017 as a spin-off from the Spanish National Research Council.](https://millionrounds.com/company/energiot) Energiot is a Barcelona-based technology startup founded in 2017 as a spin-off from the Spanish National Research Council. *Founded* 2017 Cerdanyola del Valles, Spain **$1.7M** last round Jun 2026
- 8 [**IONLY** IONLY is a Spanish company based in Valencia that focuses on electromobility and energy storage.](https://millionrounds.com/company/ionly) IONLY is a Spanish company based in Valencia that focuses on electromobility and energy storage. *Founded* 2024 La Pobla de Farnals, Spain **$1.4M** last round Mar 2026
- 9 [**ADN Mobile Solution** ADN Mobile Solution is specialized in improving efficiency and safety of transport fleet operators, especially of bus fleet operators.](https://millionrounds.com/company/adn-mobile-solution) ADN Mobile Solution is specialized in improving efficiency and safety of transport fleet operators, especially of bus fleet operators. *Founded* 2010 Gijón, Spain **$1.3M** last round Jul 2017
- 10 [**Fundeen** Fundeen is a Spanish investment platform that focuses on co-investment in renewable energy projects.](https://millionrounds.com/company/fundeen) Fundeen is a Spanish investment platform that focuses on co-investment in renewable energy projects. *Founded* 2017 Ávila‎, Spain **$1.1M** last round Apr 2025
- 11 [**Solum** Solum manufactures and delivers advanced digital labeling solutions and other electronic products to businesses.](https://millionrounds.com/company/solum) Solum manufactures and delivers advanced digital labeling solutions and other electronic products to businesses. *Founded* 2015 Spain **$1.1M** last round May 2026
- 12 [**Mirubee** Mirubee is the manufacturer Mirubox that allows to save energy intended only to households, knowing your power consumption in real time.](https://millionrounds.com/company/mirubee) Mirubee is the manufacturer Mirubox that allows to save energy intended only to households, knowing your power consumption in real time. *Founded* 2011 Spain **$1.1M** last round Jun 2014
- 13 [**Energy Solar Tech** Energy Solar Tech is a solar energy technology company.](https://millionrounds.com/company/energy-solar-tech) Energy Solar Tech is a solar energy technology company. *Founded* 2019 Madrid, Spain **$919K** last round Jul 2022
- 14 [**Gnanomat** Gnanomat is a company involved in emerging field of nanomaterials technology.](https://millionrounds.com/company/gnanomat) Gnanomat is a company involved in emerging field of nanomaterials technology. *Founded* 2014 Madrid, Spain **$845K** last round Dec 2024
- 15 [**Effilogics Technologies** Effilogics Technologies provides a unique energy management software.](https://millionrounds.com/company/effilogics-technologies) Effilogics Technologies provides a unique energy management software. *Founded* 2011 Barcelona, Spain **$340K** last round Dec 2013
- 16 [**Napptilus Battery Labs** ENERGY STORAGE SOLUTIONS](https://millionrounds.com/company/napptilus-battery-labs) ENERGY STORAGE SOLUTIONS *Founded* 2021 Barcelona, Spain **$309K** last round Oct 2022
- 17 [**Zonox** Zonox is a technology platform based in Malaga, Spain, founded in 2022 by Iñigo Flores and Manuel Palacin Pinazo.](https://millionrounds.com/company/zonox) Zonox is a technology platform based in Malaga, Spain, founded in 2022 by Iñigo Flores and Manuel Palacin Pinazo. *Founded* 2022 Malaga, Spain **$286K** last round Nov 2024
- 18 [**LightBee** LightBee is a company with a solid background team in Visible Light Communications Technology (VLC).](https://millionrounds.com/company/lightbee) LightBee is a company with a solid background team in Visible Light Communications Technology (VLC). *Founded* 2013 Las Palmas de Gran Canaria, Spain **$250K** last round May 2021
- 19 [**HelmX Co.** HelmX develops AI-powered smart helmets that turn everyday industrial fieldwork into continuously updated visual on-site intelligence.](https://millionrounds.com/company/helmx-co) HelmX develops AI-powered smart helmets that turn everyday industrial fieldwork into continuously updated visual on-site intelligence. *Founded* - Alicante, Spain **$150K** last round Aug 2026

**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?

Open any company for its rounds and investors, or search the investors who back energy startups in Spain in the app, with filters, lists and exports.

[Find their investors](https://millionrounds.com/login?join=1&next=/app/investors)[All top lists](https://millionrounds.com/top-lists)

## More energy lists

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

[*CE* *C* *SE* **Energy startups worldwide** 1,800 companies · $129B](https://millionrounds.com/top-lists/energy-startups)[*CE* *C* *SE* **Energy startups in the United States** 741 companies · $110B](https://millionrounds.com/top-lists/energy-startups-united-states)[*N* *V* *S* **Energy startups in Europe** 607 companies · $39B](https://millionrounds.com/top-lists/energy-startups-europe)[*C* *ME* *W* **Energy startups that raised in 2026** 429 companies · $73B in 2026](https://millionrounds.com/top-lists/energy-startups-raised-2026)[*S* *RS* *C* **Energy startups in the United Kingdom** 206 companies · $15B](https://millionrounds.com/top-lists/energy-startups-united-kingdom)[*C* *ME* *W* **Energy startups in the United States that raised in 2026** 194 companies · $63B in 2026](https://millionrounds.com/top-lists/energy-startups-united-states-raised-2026)[*AE* *TE* *RS* **Energy startups founded in 2021** 111 companies · $8.5B](https://millionrounds.com/top-lists/energy-startups-founded-2021)[*V* *UC* *E* **Energy startups founded in 2020** 105 companies · $15B](https://millionrounds.com/top-lists/energy-startups-founded-2020)

## More lists for Spain

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

[*CG* *GP* *N* **Startups in Spain** 1,335 companies · $20B](https://millionrounds.com/top-lists/startups-spain)[*S* *U* *OT* **Health startups in Spain** 167 companies · $1.4B](https://millionrounds.com/top-lists/health-startups-spain)[*MC* *X* *J* **AI startups in Spain** 127 companies · $1.9B](https://millionrounds.com/top-lists/ai-startups-spain)[*IE* *T* *O* **IT Services startups in Spain** 124 companies · $790M](https://millionrounds.com/top-lists/it-services-startups-spain)[*S* *U* *OT* **Healthcare startups in Spain** 86 companies · $894M](https://millionrounds.com/top-lists/healthcare-startups-spain)[*S* *OT* *AB* **Biotech startups in Spain** 81 companies · $966M](https://millionrounds.com/top-lists/biotech-startups-spain)[*L* *P* *C* **Internet startups in Spain** 54 companies · $2.5B](https://millionrounds.com/top-lists/internet-startups-spain)[*H* *C* *Z* **Transport startups in Spain** 52 companies · $1.8B](https://millionrounds.com/top-lists/transport-startups-spain)