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The clean energy sector is attracting major investment for a wide range of technologies. Startups are developing everything from commercial fusion systems to advanced nuclear reactors.
For example, Commonwealth Fusion Systems has secured $2.9 billion to pursue fusion energy, while Masdar has raised $3.3 billion for its renewable projects.
Below is our list of 100 Clean Energy startups worth keeping an eye on.
Everything you need to raise funding for your startup, including 3,500+ investors, 7 tools, 18 templates and 3 learning resources.
Buy It For $97 $297 →Information about the industries, countries, and cities they generally invest in.
Get the Sheet for $50Information about their valuation, HQ's location, founded year, name of founders, funding amount and number of employees.
Get the Sheet for $50List of startup investors in the BioTech, Health, and Medicine industries, along with their Twitter, LinkedIn, and email addresses.
Get the Sheet for $50List of 250 startup investors in the AI and Machine Learning industries, along with their Twitter, LinkedIn, and email addresses.
Get the Sheet for $50List of 250 startup investors in the FinTech and Finance industries, along with their Twitter, LinkedIn, and email addresses.
Get the Sheet for $50Commonwealth Fusion Systems builds compact, powerful fusion machines with the goal of bringing limitless clean energy to the grid. Their approach relies on groundbreaking high-temperature superconducting magnet technology to create commercially viable fusion power plants on a faster timeline.
X-energy develops advanced modular nuclear reactors and proprietary fuel technology to generate clean, carbon-free energy. The company's reactor designs focus on safety and scalability, making them a potential power source for public grids and heavy industry.
Masdar develops and operates a global portfolio of renewable energy projects, including solar, wind, energy storage, and geothermal power. They are recognized for their large-scale utility projects and commitment to advancing clean technology worldwide.
EcoFlow builds portable power stations and other renewable energy solutions. Their popular DELTA and RIVER product lines provide clean, reliable electricity for home backup, professional work, and off-grid living.
Radiant is building portable nuclear microreactors that function as a clean energy alternative to diesel generators. The technology provides reliable, zero-emission power for remote communities and military operations.
BLUETTI builds clean energy storage systems for homes and outdoor adventures. Their product line includes portable power stations and home battery backup solutions designed for reliable, off-grid power.
Mainspring Energy created a new type of power generator to provide clean and reliable electricity for commercial and industrial use. Their signature linear generator offers fuel flexibility, helping businesses reduce costs and carbon emissions on the path to a net-zero grid.
Ultraviolette Automotive builds high-performance electric motorcycles that integrate advanced battery technology with aviation-inspired design. Their flagship F77 model provides riders with a powerful combination of speed, performance, and connected features.
Nexamp builds and manages community solar farms that make clean energy accessible to homeowners, renters, and businesses. Through a subscription service, customers can save on their electricity bills by tapping into local solar power.
Last Energy builds and operates micro modular nuclear power plants, offering a new model for clean energy delivery. Their system is designed to provide scalable, carbon-free power directly to industrial customers.
The top 10 are just a small slice of the activity happening in the clean energy sector. Founders have collectively raised tens of billions of dollars, building everything from brand new hardware to AI-powered grid management.
This wave of work is what will define the industry for years to come. Below is a look at 90 more companies that are part of this important movement.
| Startup | Main Industry | Year Founded | Amount Raised | Last Funding Round |
|---|---|---|---|---|
| Energy | 2016 | $26.6M | Series C | |
| Energy | 2017 | $18.2M | — | |
| Energy | 2023 | $46.3M | Series A | |
| Energy | 2017 | $3.5B | Undisclosed | |
| Energy | 2013 | $106.6M | Venture Round | |
| Energy | 2016 | $55.6M | Venture Round | |
| Energy | 2023 | $196.5M | Series A | |
| Energy | 2020 | $867M | Undisclosed | |
| Energy | 2019 | ¥22.3B | Debt Financing | |
| Energy | 1981 | $1B | Debt Financing | |
| Energy | 2020 | $298.3M | Venture Round | |
| Environment | 2021 | $7M | Grant | |
| Environment | 2007 | $505.3M | Grant | |
| Energy | 2021 | $151.7M | Debt Financing | |
| Energy | 2021 | $11M | Grant | |
| Energy | 2020 | $9M | Seed | |
| Energy | 2011 | $489.2M | Private Equity | |
| Energy | 2013 | $19.5M | Venture Round | |
| AI | 2012 | $95.3M | Series C | |
| Energy | 2019 | $82.5M | Seed | |
| Energy | 2009 | $7.7B | Debt Financing | |
| Energy | 2021 | $373.3M | Private Equity | |
| Energy | 2016 | $212.5M | Undisclosed | |
| Mobility | 2019 | $2.7M | Seed | |
| Energy | 2021 | $8.5M | Series A | |
| Energy | 2021 | $677.1M | Series A | |
| Energy | 2020 | $20.3M | Series A | |
| Energy | 2014 | $4.7M | Grant | |
| Energy | 2020 | $10.9B | Debt Financing | |
| Energy | 2018 | $23M | Series B | |
| Energy | 2006 | $1.5B | Venture Round | |
| Energy | 2020 | $798.3M | Debt Financing | |
| Energy | 2017 | $90.9M | Series C | |
| Energy | 2014 | $575.5M | Series E | |
| Energy | 2017 | $1.5B | Debt Financing | |
| Energy | 2013 | $392.4M | Series D | |
| Energy | 2019 | $297M | Corporate Round | |
| Energy | 2011 | $835M | Debt Financing | |
| Hardware | 2016 | $13.8B | Debt Financing | |
| AI | 2016 | $46M | Undisclosed | |
| Energy | 2022 | $7.7M | Seed | |
| Hardware | 2018 | $136M | Private Equity | |
| Energy | 2009 | $1.8B | Debt Financing | |
| Energy | 2020 | $300M | Series C | |
| AI | 2015 | $145M | Venture Round | |
| Energy | 2014 | $266.6M | Grant | |
| Energy | 2013 | SEK80M | Grant | |
| Energy | 2022 | $20M | Grant | |
| Energy | 2014 | ₹103.5B | Debt Financing | |
| Hardware | 2010 | $169.2M | Series E | |
| Energy | 2011 | $130.5M | Debt Financing | |
| Hardware | 2016 | $68.8M | Debt Financing | |
| Mobility | 2018 | $69.8M | Series B | |
| Energy | 1996 | $225M | Debt Financing | |
| Energy | 2001 | $145M | Venture Round | |
| Energy | 2007 | $950M | Debt Financing | |
| AI | 2024 | CA$220k | Pre-Seed | |
| Mobility | 2017 | CN¥18.3B | Series A | |
| Energy | 2011 | $400.7M | Corporate Round | |
| Hardware | 2023 | £800k | Grant | |
| Energy | 2012 | $73.2M | Series A | |
| Energy | 2019 | $1.2B | Debt Financing | |
| Energy | 2018 | $42.5M | Series A | |
| Energy | 2022 | $36.4M | Series A | |
| Energy | 2011 | $250.1M | Corporate Round | |
| Energy | 2017 | $3.7B | Debt Financing | |
| Energy | 2016 | $9.8M | Venture Round | |
| Energy | 2014 | €4.6M | Grant | |
| Energy | 2024 | $3M | Seed | |
| Energy | 2022 | ₹3.6B | Debt Financing | |
| AI | 2018 | £12.3M | Series A | |
| Energy | 2019 | CN¥1.5B | Series C | |
| Manufacturing | 2022 | €2M | Pre-Seed | |
| Energy | 2015 | $11.1M | Grant | |
| AgTech | 2013 | £139.1M | Private Equity | |
| AI | 2017 | £56.6M | Series B | |
| Environment | 2012 | £12.2M | Grant | |
| Energy | 1995 | £15.4M | Debt Financing | |
| Energy | 2019 | $15M | Private Equity | |
| Mobility | 2020 | $6M | Grant | |
| Energy | 2016 | $15.2M | Venture Round | |
| Media | 2017 | ₩104B | Venture Round | |
| Energy | 2016 | $2.7M | Seed | |
| Energy | 2008 | $13.7M | Grant | |
| Manufacturing | 2022 | $6M | Series A | |
| Energy | 2014 | $5.2M | Venture Round | |
| Energy | 2023 | $717.1k | Undisclosed | |
| Energy | 2011 | €12M | Debt Financing | |
| Energy | 2015 | €6.3M | Venture Round | |
| Energy | 2012 | €14M | Series B |
