Top 100 Energy Startups to Watch in 2026
The energy sector is being reshaped by startups attracting major funding for new technologies.
For instance, Commonwealth Fusion Systems has raised $2.9 billion to commercialize fusion energy. On the other end, recent startups like Base Power are providing home backup power solutions.
Below is our list of 100 Energy startups worth keeping an eye on.
Failory's Top 10 Picks
Tether builds AI software that turns millions of parked electric vehicles into the world’s largest battery. Their platform manages this distributed energy network, helping to balance the power grid and integrate more renewable sources.
| Headquarters | Stockholm, Stockholms Lan, Sweden |
| Year Founded | 2022 |
| Founders | Luis Medina Rivas, Martim Perestrelo |
| Funding Amount | $1.5M |
| Startup Size | Founding Team (1-10) |
| Last Funding Status | Pre-Seed |
| Top Investors | Techstars, K Fund, Draper B1, Enzo Ventures, Inclimo Climate Tech Fund |
Commonwealth Fusion Systems is creating a faster path to commercial fusion energy. They build compact, powerful tokamak systems using high-temperature superconducting magnets to deliver clean power to the grid.
| Headquarters | Cambridge, Massachusetts, United States |
| Year Founded | 2017 |
| Founders | Dan Brunner, Martin Greenwald, Robert Mumgaard |
| Funding Amount | $2.9B |
| Startup Size | Major Organization (1,001-5,000) |
| Last Funding Status | Series B |
| Top Investors | Temasek Holdings, Khosla Ventures, HOF Capital, Quiet Capital, Google |
X-energy designs and builds advanced small modular nuclear reactors and the fuel technology required for clean energy generation. Their work focuses on creating a safer, more scalable source of carbon-free power for industrial use and electricity grids.
| Headquarters | Rockville, Maryland, United States |
| Year Founded | 2009 |
| Founders | Kam Ghaffarian |
| Funding Amount | $1B |
| Startup Size | Large Team (251-1,000) |
| Last Funding Status | Private Equity |
| Top Investors | Alumni Ventures, Ares Management, Jane Street Capital, University of Michigan, NGP Energy Capital Management |
Helion Energy develops fusion power technology with the goal of generating clean, carbon-free electricity. Their team is building the world's first fusion power plants to help decarbonize the global energy grid.
| Headquarters | Everett, Washington, United States |
| Year Founded | 2013 |
| Founders | Chris Pihl, David Kirtley, George Votroubek, John Slough |
| Funding Amount | $1B |
| Startup Size | Large Team (251-1,000) |
| Last Funding Status | Series F |
| Top Investors | Lightspeed Venture Partners, Y Combinator, SoftBank Vision Fund, Mithril Capital Management, Sam Altman |
Torus develops smart energy storage systems that help homeowners and communities manage their own renewable power. Their integrated hardware and software solutions aim to make clean energy more accessible and reliable for everyday use.
| Headquarters | Lehi, Utah, United States |
| Year Founded | 2021 |
| Founders | Nate Walkingshaw |
| Funding Amount | $267M |
| Startup Size | Mid-Size Team (51-250) |
| Last Funding Status | Venture Round |
| Top Investors | ICONIQ Capital, EPIC Ventures, Origin Ventures, Pelion Venture Partners, Magnetar Capital |
Base Power pairs a home battery with an electricity plan to give homeowners reliable backup power. Their integrated system helps lower monthly energy bills and ensures the lights stay on during an outage.
| Headquarters | Austin, Texas, United States |
| Year Founded | 2023 |
| Founders | Zachary Dell |
| Funding Amount | $268M |
| Startup Size | Mid-Size Team (51-250) |
| Last Funding Status | Series B |
| Top Investors | Andreessen Horowitz, Valor Equity Partners, Lightspeed Venture Partners, Thrive Capital, Addition |
Masdar develops and operates a global portfolio of renewable energy projects, with a focus on solar, wind, and geothermal power. They are a key player in advancing clean energy initiatives and investing in sustainable technologies around the world.
| Headquarters | Abu Dhabi, Abu Dhabi, United Arab Emirates |
| Year Founded | 2006 |
| Founders | H.E. Sultan Al Jaber |
| Funding Amount | $3.3B |
| Startup Size | Large Team (251-1,000) |
| Last Funding Status | Debt Financing |
| Top Investors | European Investment Bank, European Bank for Reconstruction and Development, International Finance Corporation, Asian Development Bank, Asian Infrastructure Investment Bank |
EcoFlow builds a range of portable power stations and solar-powered generators designed for off-grid living and home backup. They create accessible, eco-friendly energy solutions that provide reliable power for everything from camping trips to professional work sites.
| Headquarters | San Francisco, California, United States |
| Year Founded | 2016 |
| Founders | Eli Harris, Fan Zheng, Hannah Sieber, Lei Wang |
| Funding Amount | $114.4M |
| Startup Size | Major Organization (1,001-5,000) |
| Last Funding Status | Product Crowdfunding |
| Top Investors | HSG, CICC, GL Ventures LLC, Delian Capital, Guoxin Fund |
Aalo Atomics develops and manufactures compact nuclear reactors for clean energy production. Their advanced, sodium-cooled power plants are designed to help create a zero-carbon world.
| Headquarters | Austin, Texas, United States |
| Year Founded | 2023 |
| Founders | Matt Loszak, Yasir Arafat |
| Funding Amount | $136M |
| Startup Size | Lean Team (11-50) |
| Last Funding Status | Series B |
| Top Investors | Alumni Ventures, Gaingels, Valor Equity Partners, Tishman Speyer, Hitachi Ventures |
Unbound Potential builds large-scale energy storage systems to help manage power grids and integrate renewable sources. Their work focuses on creating advanced battery technology for applications ranging from industrial use to utility-scale power.
| Headquarters | Thalwil, Zurich, Switzerland |
| Year Founded | 2023 |
| Founders | Anetta Platek-mielczarek, David Taylor, Emilio Dal Re, Federico Paratore, Pier Giuseppe Rivano |
| Funding Amount | $20.4M |
| Startup Size | Lean Team (11-50) |
| Last Funding Status | Grant |
| Top Investors | Amazon, Founderful, Zürcher Kantonal Bank, Innosuisse, Kvanted Ventures |
90 Additional Energy Startups Worth Following
Our top ten picks offer a snapshot of a much larger movement. Founders are building everything from new hardware to AI platforms that make our grid smarter.
Many of these companies are young, yet together they have raised tens of billions of dollars. Here is a look at the other startups defining the energy sector in 2026.
| Startup | Main Industry | Year Founded | Amount Raised | Last Funding Round |
|---|---|---|---|---|
 Radiant | Energy | 2019 | $218.8M | Series C |
 Fourth Power | Hardware | 2021 | $39M | Series A |
 Koolboks | Hardware | 2018 | $15.4M | Series A |
 Group14 Technologies | Hardware | 2015 | $1.2B | Series D |
 BLUETTI | Hardware | 2019 | $24.1M | Product Crowdfunding |
 Emerald AI | AI | 2024 | $41.5M | Corporate Round |
 DroneDeploy | AgTech | 2013 | $157.6M | Venture Round |
 Mainspring Energy | Energy | 2010 | $813M | Series F |
 Ultraviolette Automotive | Mobility | 2016 | $90.2M | Venture Round |
 General Fusion | Energy | 2002 | $392M | Venture Round |
 Sempra Infrastructure | Energy | 1998 | $15.2B | Secondary Market |
 Nexamp | Energy | 2007 | $2.4B | Debt Financing |
 Span | Energy | 2018 | $229.8M | Series B |
 Last Energy | Energy | 2020 | $64M | Series B |
 Chakr Innovation | Energy | 2016 | $26.6M | Series C |
 OXCCU | Biotech | 2021 | $54.1M | Series B |
 Eden | Energy | 2017 | $18.2M | — |
 XL Batteries | Energy | 2019 | $25.4M | Seed |
 Serentica Renewables | Energy | 2022 | $1.9B | Debt Financing |
 The Nuclear Company | Energy | 2023 | $46.3M | Series A |
 Nitricity | AgTech | 2018 | $90.9M | Series B |
 Pure Lithium | Hardware | 2020 | $30.3M | Grant |
 Arevon | Energy | 2017 | $3.5B | Undisclosed |
 SingAuto | Energy | 2023 | $95M | Venture Round |
 Terrestrial Energy | Energy | 2013 | $106.6M | Venture Round |
 Deep Isolation | Energy | 2016 | $55.6M | Venture Round |
 Proxima Fusion | Energy | 2023 | $196.5M | Series A |
 Fuse Energy | Energy | 2022 | $100.7M | Venture Round |
 Factorial Energy | Hardware | 2021 | $240M | Series D |
 EV Realty | Mobility | 2021 | $103M | Private Equity |
 Verlume | Hardware | 2013 | £13.8M | Grant |
 Deep Sky | Environment | 2022 | $93.6M | Grant |
 Aspen Power | Energy | 2020 | $867M | Undisclosed |
 Kyoto Fusioneering | Energy | 2019 | ¥22.3B | Debt Financing |
 Electra | Energy | 2020 | $299.5M | Series B |
 GoodLeap | Fintech | 2003 | $1.2B | Debt Financing |
 Nuclearn | AI | 2021 | $13M | Series A |
 S.P.O.N.S.O.R. (SCOP) | AI | 2025 | $850k | Seed |
 Holtec International | Energy | 1986 | $1.5B | Debt Financing |
 Motiv Electric Trucks | Mobility | 2009 | $310.8M | Undisclosed |
 Odyssey | Fintech | 2017 | $39.1M | Debt Financing |
 ENGIE North America | Energy | 1981 | $1B | Debt Financing |
 Fortera | Manufacturing | 2007 | $175.5M | Venture Round |
 ABO Energy | Manufacturing | 2013 | $240M | Debt Financing |
 Euclid Power | Energy | 2021 | $20M | Series A |
 Sympower | Energy | 2015 | $76.8M | Series B |
 Terra One | Hardware | 2021 | $157M | Debt Financing |
 Rad Power Bikes | Environment | 2007 | $329.3M | Series D |
 Moleaer | Energy | 2016 | $67.5M | Corporate Round |
 Amogy | Energy | 2020 | $298.3M | Venture Round |
 Radia | Mobility | 2016 | $100M | Series C |
 Natron Energy | Hardware | 2012 | $352.6M | Venture Round |
 Electrify America | Mobility | 2016 | $450.7M | Grant |
 Mercuria | Energy | 2004 | $15.4B | Debt Financing |
 Consumers Energy | Retail | 1886 | $100M | Grant |
 WAAT | Mobility | 2018 | $130M | Venture Round |
 Madison Energy Infrastructure | Energy | 2019 | $1.5B | Debt Financing |
 Leap | Energy | 2017 | $60.1M | Series B |
 Nexus Renewable Power | Hardware | 2016 | $320M | Undisclosed |
 Nanoramic Laboratories | Manufacturing | 2009 | $130.1M | Venture Round |
 Peak Energy | Energy | 2023 | $65M | Series A |
 Seabound | Environment | 2021 | $7M | Grant |
 Univers | Energy | 2017 | $210M | Venture Round |
 Bidgely | Analytics | 2011 | $100.7M | Venture Round |
 Nyobolt | Hardware | 2020 | $113.6M | Venture Round |
 TechMet | Energy | 2017 | $551.5M | Private Equity |
 Voltus | Energy | 2016 | $66.1M | Series C |
 Zelestra | Energy | — | $557.7M | Debt Financing |
 Instagrid | Hardware | 2018 | $124.9M | Series C |
 Svante | Environment | 2007 | $505.3M | Grant |
 ICE Thermal Harvesting | Energy | 2021 | $151.7M | Debt Financing |
 Edify Energy | Energy | 2015 | A$57.7M | Grant |
 GameChange Solar | Energy | 2012 | $151.7M | Series A |
 Fervo Energy | Energy | 2017 | $991.6M | Debt Financing |
 Form Energy | Hardware | 2017 | $1.6B | Debt Financing |
 Moment Energy | Hardware | 2020 | $61.5M | Grant |
 Ascend Elements | Manufacturing | 2015 | $1.8B | Secondary Market |
 LevelTen Energy | Analytics | 2016 | $139.6M | Series D |
 itselectric | Energy | 2021 | $11M | Grant |
 24M Technologies | Hardware | 2010 | $184.8M | Series H |
 Aetherflux | Energy | 2024 | $50M | Series A |
 SSEN Transmission | Energy | 2000 | $2.6B | Debt Financing |
 Invenergy | Enterprise | 2001 | $10.5B | Debt Financing |
 Hydrostor | Energy | 2010 | $2.3B | Debt Financing |
 encentive | Energy | 2020 | $9M | Seed |
 enadyne | Manufacturing | 2022 | $7M | Seed |
 Reach | Energy | 2014 | $39.1M | Series A |
 HIF Global | Energy | 2019 | $480M | Corporate Round |
 Mosaic | Energy | 2011 | $489.2M | Private Equity |
 EnergyX | Manufacturing | 2018 | $649.5M | Equity Crowdfunding |
