Top Clean Energy Startups in 2026

We imagine a future where sunlight continues powering solar farms and providing lighting after the sun sets. We’re a small team of engineers who make progress by building things quickly and iteratively. Time is our greatest constraint. Join us!

We exist to to accelerate the monumental shift away from the supersystem of extraction, processing, and burning of fossil fuels - toward lightweight capture and consumption from entirely renewable sources. While decarbonization seems to be beyond our horizon, we remain undaunted; the long arc of energy consumption must bend toward sustainability. We believe in energy from renewable sources seamlessly integrated into everyday life. The future is silent, efficient, zero emission, flexible, distributed, and clean.

We’re supercharging the clean economy Crux is the capital markets platform changing the way clean energy and manufacturing projects are financed in the U.S. Crux’s platform, market intelligence, and expert team help developers and manufacturers unlock financing through all stages of project development and operation. Our team of 60+ is composed of experts in energy, tax, finance, government, and technology. We have raised $77 million in capital from some of the best investors, including Andreessen Horowitz, Lowercarbon Capital, New System Ventures, Overture, Ardent Venture Partners, QED, Canapi, and others. These funds are joined by strategic investors including Pattern Energy, Clearway Energy, EDF Renewables, Intersect Power, LS Power, Orsted, Hartree Partners, Liberty Mutual Strategic Ventures, MassMutual Ventures, and OMERS Ventures. An inflection point in American energy and manufacturing. Energy demand is growing for the first time in 20 years, driven by surging manufacturing, transportation, electrification, and data centers. Simultaneously, hundreds of billions of dollars are being invested in domestic supply chains for critical minerals and components. Developers and manufacturers will require trillions of dollars in capital to meet growing needs. Prior to Crux, the capital markets supporting this transformation were opaque, fragmented, and complex. At Crux, we recognized the missing infrastructure: a central capital markets platform designed specifically for the next century of American energy and industry. By connecting counterparties, providing market intelligence, and streamlining transactions, we unlock faster decision making, lower cost of capital, and accelerated investment.

At Halo Industries, we’re on a mission to reinvent a decades-old semiconductor manufacturing process that wastes billions of dollars each year. Our laser-based technology will provide a drastic reduction in cost and improvement in performance that will enable advancements in a diverse set of high-tech industries, such as solar, semiconductor, battery, LED, telecommunications, and power electronics. Our company spun out of Stanford University in 2014 and is funded by a combination of VCs, government grants, and strategic corporate partners. We are hitting the ground running after a recent funding round and are looking to continue building a passionate team to meet our next milestone of deploying a pilot production line to make the world more connected, efficient, and clean.

Founded in 2012, Pegasus Solar designs and manufactures innovative rooftop mounting systems for global solar markets. The company began commercialization in mid-2014 and is supplying the LightSpeed Mount, a revolutionary new rail-less system, to major solar installers nationwide. Operating from facilities in Richmond, California, Pegasus Solar’s team of solar industry veterans, talented engineers and experienced business executives are dedicated to simplifying solar, speeding up installations and driving out cost.

Eagle Creek Renewable Energy is devoted to our energy future. We own and operate a fleet of 85 hydropower plants in 17 states. These facilities are our laboratory for developing technologies for the next generation of renewables. We are continuously optimizing our facilities and are always searching for better ways of doing things while maintaining operational excellence. We prize safety and stewardship and know that the best path forward aligns with the needs of our communities. We are growing our fleet and our portfolio of technologies as we accelerate towards a sustainable energy future.

GreenLancer is a web-based startup that provides engineering support and deliverables to clients on all sides of the clean technology industry. Our services help contractors develop and design clean energy projects, we are their comprehensive technical backoffice. GreenLancer's post industrial model leverages best practices with powerful collaboration and automation strategies that improves qualtiy, accelerates delivery, and reduces soft costs associated with engineering and design.

Coreshell Technologies is accelerating the world’s transition to electric transportation and renewable energy by solving the key degradation issue in rechargeable batteries. Their breakthrough nanolayer thin-film coating technology protects batteries from degrading chemical reactions and is uniquely capable of seamlessly fitting into existing manufacturing while producing the step change needed in the capacity, safety, and cost of batteries.

NET Power is a clean energy technology company with a mission to globally deploy affordable and reliable zero-emissions energy solutions. The Company licenses its proprietary NET Power Cycle, which transforms natural gas into low-cost, clean power that's available 24/7. Founded in 2010 and headquartered in Durham, North Carolina, NET Power is driving global adoption by partnering with power producers, technology providers, investors and other innovators to deliver utility-scale plants.