Top 76 Clean (Renewable) Energy startups

Updated: Dec 05, 2025
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Clean Energy startups generate and distribute energy from renewable sources, basically solar and wind.
1
Tesla
Country: USA | Funding: $20.2B
Tesla is Elon Musk's automotive and clean energy company. It develops and manufactures popular electric vehicles, home energy storage systems, solar panels, solar roof tiles and related products and services for residential and industrial customers. Tesla sources its car and home batteries (Powerwall) from three suppliers: CATL, LG Energy Solution and Panasonic, the latter of which has located part of its battery production at the Tesla Gigafactory Nevada. Tesla is also currently expanding its own battery production capacity. Tesla also manufactures Tesla Solar Roof and Tesla Solar Inverter, while regular solar panels it buys from other companies. For larger customers Tesla provides an online platform that enables automated real-time demand forecasting and energy management, as well as a comprehensive Megapack energy storage system. For residential customers, the company operates a virtual energy company in Texas called Tesla Electric which controls the network of Powerwalls.
2
Avaada Energy
Country: India | Funding: $3.7B
Avaada Energy is committed to provide affordable, clean and abundant power for India. For us, it is a new journey. A journey fuelled by our passion for sustainable energy and backed by our credentials and the trust of our stakeholders.
3
Sunnova
Country: USA | Funding: $3.2B
Sunnova provides low-cost solar power to homes. It owns the equipment, installs it, and also eventually sells the electricity it creates to customers.
4
Octopus Energy
Country: UK | Funding: $2.9B
Octopus Energy develops cloud-based smart grid platform and provides fair prices forever and greener energy from the UK's largest investor in solar generation. It uses an innovative AI and data-based platform to balance loads around the grid.
5
Nexamp
Country: USA | Funding: $2.4B
Nexamp is bringing clean energy to homeowners and communities everywhere, and helping them save up to 10% on electricity costs without installing rooftop solar panels.
6
Palmetto
Country: USA | Funding: $2.2B
Palmetto is the leading clean technology software and fulfillment company.
7
Acciona
Country: Spain | Funding: $2.1B
ACCIONA is the development and management of infrastructure, renewable energy, water, and services.
8
Silicon Ranch
Country: USA | Funding: $2.1B
Silicon Ranch developer, owner and operator of solar energy facilities in US.
9
energyRe
Country: USA | Funding: $1.8B
energyRe is at the forefront of North America's energy transition. Building and delivering reliable clean power directly to where people live is not only our opportunity—it is our responsibility.
10
BrightNight
Country: USA | Funding: $1.6B
Bright Night provides renewable power solutions in a safe and reliable way.
11
Aira
Country: Sweden | Funding: $710M
Aira operates as a clean energy-tech company driving the clean energy revolution with air source heat pumps.
12
AES Solar
Country: USA | Funding: $700M
AES Distributed Energy creates solar plus storage facilities, which includes systems that can hold and release solar energy at will.
13
Arcadia
Country: USA | Funding: $575.5M
Arcadia Power is a nationwide home energy platform providing clean energy and savings.
14
Ovo Energy
Country: UK | Funding: £447M
OVO Energy is an independent energy technology company and supplier. OVO also installs world’s most advanced storage heaters
15
CrossBoundary Energy
Country: Kenya | Funding: $310M
CrossBoundary is an investment company that dedicate its funds to commercial and industrial solar in Africa.
16
Brighte
Country: Australia | Funding: $306.5M
Brighte is a digital credit platform for financing home energy improvements.
17
Fotowatio Renewable Ventures
Country: Spain | Funding: $284.9M
Fotowatio Renewable Ventures is providing comprehensive renewable energy solutions across the globe.
18
Zolar
Country: Germany | Funding: €259M
ZOLAR is an online provider of solar systems enables the entry into the private energy supply for private households.
19
Enviria
Country: Germany | Funding: €207.5M
ENVIRIA offers companies easy and safe access to scalable energy-as-a-service solutions and the renewable energy ecosystem.
20
BBOXX
Country: UK | Funding: $215M
BBOXX designs, manufactures, and distributes plug and play solar systems. It also offers pay-as-you-go solar power. BBOXX Power DC product range is closed DC systems in standardised sizes. BBOXX Hub brings the smart capabilities of remote monitoring and control to larger capacity systems and projects. BBOXX Pulse is a comprehensive management platform that enables growth of next generation utility businesses.
Alexander Gillet
Editor: Alexander Gillet
Alexander Gillet is a senior editor for EnergyStartups. He has a deep background in energy sector and startups. Alexander graduated from Emlyon Business School, a leading French business school specialized in entrepreneurship. He has helped several non-profit organizations dedicated to promoting environmental education and sustainability and has written over 250 articles on energy technology for various websites. In his free time, Alexander enjoys yoga, camping and exploring the Blue Ridge Mountains. You can contact Alexander at alexgillet(at)energystartups(dot)com