Introduction
The climate tech industry continues to evolve amid political shifts and environmental urgency. While U.S. policies fluctuate—from pro-oil incentives under President Donald Trump to climate-forward legislation under Joe Biden—private innovation in renewable energy remains relentless. In 2025, climate-tech companies are driving progress through electric aviation, modular nuclear reactors, carbon capture, and more. Here are 11 groundbreaking companies shaping the sustainable future.
1. Also
Spun out from EV-maker Rivian, Also is building micromobility solutions like e-bikes and scooters. Although its first product is set for a 2026 commercial release, the company has already raised $105 million. Read more at TechCrunch.
2. Beta Technologies
Based in Vermont, Beta Technologies is developing electric aircraft, including eVTOLs (electric vertical takeoff and landing). The company has secured over $1 billion in funding and is also creating an EV charging network for air and ground vehicles. Read more on Bloomberg.
3. Brimstone
Brimstone is revolutionizing cement production, responsible for 8% of global CO2 emissions, by using carbon-free calcium silicate. Its cement even captures CO2 thanks to its magnesium content. Learn more via World Economic Forum.
4. Climeworks
Climeworks is a global leader in direct air capture. With facilities in Iceland and a major U.S. presence including Project Cypress in Louisiana, it enables carbon removal at scale. It also allows corporate partnerships via its carbon removal marketplace. Visit Climeworks.
5. Fervo Energy
Fervo Energy uses fracking techniques to access geothermal heat, offering a clean alternative to fossil fuels. It secured $500 million in 2024 and is focused on scaling in California. Explore details on NYT.
6. JetZero
JetZero is redesigning commercial aircraft with a futuristic blended wing body that boosts fuel efficiency and reduces emissions. Delta Airlines recently partnered with JetZero to bring these aircraft to market. Delta-JetZero partnership.
7. NuScale Power
NuScale Power became the first U.S. company to receive certification for its small modular reactor. Despite canceling a major 2023 project, NuScale remains pivotal in reshaping nuclear energy. Details from the U.S. Nuclear Regulatory Commission.
8. Sunrun
Sunrun is the largest residential solar installer in the U.S., now leading in home energy storage as well. Its solar-as-a-service model makes green energy accessible and efficient. Visit Sunrun’s website.
9. Telo
Telo is developing compact electric trucks with major utility. Backed by Tesla co-founders, it aims to compete in urban EV markets with vehicles expected by 2026. More at Electrek.
10. X-Energy
X-Energy focuses on small modular nuclear reactors and secured $500M from Amazon’s Climate Pledge Fund. With projects in the pipeline and tech expansion ahead, it joins TerraPower and Oklo in redefining the nuclear sector.
11. ZeroAvia
ZeroAvia is pioneering hydrogen-electric engines for aircraft, offering zero-emissions flight solutions. Supported by Breakthrough Energy Ventures, the startup is a major player in the sustainable aviation revolution. Visit ZeroAvia.
Conclusion
These 11 climate-tech companies are transforming energy, aviation, and materials in 2025. As they gain traction through innovation and strategic partnerships, they set the stage for a cleaner, greener future. For deeper dives into clean energy and AI’s role in sustainability, explore our related blogs:
