Top Clean Technology Startups in 2026

Aurora Solar develops cloud-based software that enables sophisticated solar PV engineering design, provides workflow management functionality, and facilitates sales and customer acquisition for solar installers and financiers. Our software is used to create over 200,000 solar projects a month across the US and around the world.

We save building owners money on their energy bills by managing their onsite energy assets (such as battery storage, HVAC controls, solar, cogeneration, and electric vehicles) intelligently and efficiently with our machine learning platform. Our position as a retail electricity provider allows us to unlock value streams to customers currently unavailable to them.

bluerivert.com We use computer vision to identify weeds in organic crop fields and then selectively eliminate them using very hot organic oil. Our product mounts behind a tractor. We are an alternative to chemical fertilizers which organic farmers can't use. Our first target is organic vegetables growers who currently spend upto $1000 per acre to weed their fields by hand. Longer term will move to weeding of corn in glyphosate resistant areas. $25B/yr are spent in herbicides. Update: 5/13. We've started recurring revenue in lettuce thinning - an application that is very well suited to our technology. Our first customer is the largest lettuce grower in the world. Out team has now 15 people including 4 PhDs, an agronomist, and experienced business people in the Ag-tech area.

Wunder is a Modern Energy Company. We help businesses, municipalities, and schools save money by delivering clean on-site power. We convert simple warehouses into electrified industrial platforms built for the future. We enable the nation’s leading commercial and industrial real estate firms to capture the benefits of solar across their properties. We align ESG goals with revenue targets. We deploy renewable energy assets today that will power America’s tomorrow. We open new markets, we launch new partnerships, and we build new solar and energy storage projects every day. Join us at wundercapital.com/careers

Oklo is a California-based company developing clean energy plants to provide emission-free, reliable, and affordable energy using advanced fission. Oklo is a fast-growing startup with a history of reliable funding and milestones for more than 5 years. Oklo’s first product is a microgrid scale powerhouse. The powerhouse can produce clean energy for decades without needing to refuel, and also has the capability to turn nuclear waste into clean energy. Oklo received a Site Use Permit from the U.S Department of Energy, demonstrated fabrication of its fuel, was awarded fuel from the Idaho National Laboratory, and submitted the first accepted advanced fission license application to the regulator. Oklo has been featured in Popular Mechanics, Wired, Architectural Digest, Hyperallergic, POWER Magazine, and has been the subject of a Harvard Business School case, and was featured in the documentary The New Fire, among many other features.

Here at Piaggio Fast Forward we build technology products that move the way people move. We created the gita personal robot which can follow you around relieving you of the chore of carrying your things while also charging your cell phone. We believe design comes first, are inclusive and collaborative, turn problems into opportunities and do more with less. We are a company with Italian roots that is building the future.

We provide innovative artificial intelligence systems which utilize end-to-end deep-learning that enables driving across diverse urban environments. This unique approach to software development and implementation allows our systems to learn and adapt to never-before-seen urban environments seamlessly and safely without making compromises in safety or ease of utilization to allow the efficient movement of people, goods and more. This isn't just a single-city trial, our aggressive implementation will place us as the first company to launch our software in over 100 different urban environments.

Omnidian’s award-winning teams have been protecting the large-scale residential solar portfolios of our fortune 1000 clients and now - the industry’s leading residential solar protection plan with a 95% performance guarantee is available to homeowners through select elite and premier dealers. in 2017, we were awarded the department of energy sunshot grant, which accelerates the development of highly impactful solar energy technologies.

Commonwealth fusion systems (cfs) was spun out of mit's plasma science and fusion center to leverage the decades of fusion research combined with the innovation and speed of the private sector. supported by the world’s leading investors in breakthrough energy technologies, the cfs team is uniquely positioned to deliver the fastest path to commercial fusion energy. cfs has assembled a world class team that includes experts in magnets, manufacturing and plasma physics dedicated to the mission of delivering clean, limitless fusion power to the world.

At Rhythm Energy, we’re redefining what it means to power a home. Launched in 2021, we help Texans transition to 100% renewable energy through thoughtfully designed products that put customers in control. Our approach combines technology, transparency, and a customer-first mindset to create a smarter, more sustainable energy experience. But what really sets us apart is our people. We’re a multidisciplinary team of builders—engineers, product thinkers, data experts, creatives, and customer advocates—working together to solve complex problems in a simple, human way. We move fast, think independently, and care deeply about the impact of our work. Our mission is straightforward: make clean energy more accessible, intuitive, and valuable for everyday life. If you’re someone who likes building from the ground up, thrives in ambiguity, and wants your work to matter, you’ll fit right in. We’re always looking for people who bring curiosity, ownership, and a bias toward action.