Top Clean Technology Startups in 2026

HAX is an SOSV program for hard-tech startups transforming industry. HAX started in 2012 with the goal to provide entrepreneurs with the opportunity to solve the world’s problems through hardware. We’ve spear-headed the hardware renaissance and created the lean hardware movement, which led us to build the world’s largest community of hardware companies with our two-stage programs - Stage I in Shenzhen which helps startups build and ship products, and a Stage II program in San Francisco which is helping them scale worldwide. The 300+ startups HAX invested in have been tackling extremely important world challenges in consumer, health, enterprise and industrial environments, while impacting the world with amazing products such as Particle, Makeblock, Yeelight, Avidbots, Opentrons, Nura, Simbe Robotics, etc... Companies are hailing from the US at 60%, 20% from Europe and 20% from Asia.

JETCOOL Technologies is an exciting new hardware startup commercializing its MIT-developed cooling technology for managing heat in electronic devices. We are integrating our ultra-high effectiveness liquid cooling mechanism into emerging high tech markets of defense and aerospace, electric vehicles, and performance processors. JETCOOL uses its patent-pending approach of directing small, high velocity fluid jets to remove heat from devices such as AI processors, EV powertrain modules, and RF communication amplifiers. By using creative fluid dynamics and improved thermodynamic design, JETCOOL's products offer over 10X better cooling ability compared to current commercially available approaches. The improved cooling effectiveness offers advantages to electronics everywhere, including improved efficiency, longer lifetimes, more compact packaging, higher computational power, and much more. Where current electronic designers are running into limits from heat, we are breaking down those barriers to enable the next generation of electronics via enhanced thermal management. We encourage you to visit our website (jetcool.com) and contact us to learn more about what we are building. Do you want to be a part of a groundbreaking thermal technology?

A ground-up electric RV design allows us to create a product that uniquely addresses the challenges of the towing and living RV experience. We are creating an RV that is built to last and preserves the ability to bring an RV outdoors as the towing vehicle moves to electric.

HomeWorks Energy, is an energy efficiency company tackling the massive problem of homes consuming between 30-50% more energy than necessary. We've taken the fractured energy efficiency market and created a single point-of-contact for homeowners to upgrade their homes with solar, heating and cooling, insulation, windows, and appliances and we help navigate the complex rebates and subsidies offered by various government programs.

Elemental Excelerator helps startups change the world, one community at a time. Each year, we find 12-15 companies that best fit our mission and fund each company up to $1 million to improve systems that impact people’s lives: energy, transportation, water, agriculture, and beyond. To date, we have awarded over $22 million to more than 60 companies. What makes us unique? We co-fund, co-design, and co-develop projects and strategies that improve infrastructure and sustainably enhance communities. Our program is funded by a diverse coalition of utility partners, corporate partners, the U.S. Navy, the U.S. Department of Energy, state government, and philanthropic organizations. We are a non-profit created in collaboration with Emerson Collective. For more information, please visit elementalexcelerator.com.

We’re using technology to create a leaner business from the ground up – doing away with long calls to call centres, letters piling up in mailboxes, and the notorious bureaucracy this industry is famous for.

Chloris is a venture-backed and mission-driven technology company changing the way businesses and governments use data about the environment and nature-based solutions to guide their investment and carbon management decisions. Our team of impact-driven experts in ecological science, remote sensing, machine learning, product development, and corporate strategy are committed to acclerating the global transition to a regenerative and nature-positive economy.

Moment Energy is repurposing Electric Vehicle (EV) batteries into clean, safe, and reliable power storage for on and off-grid applications. Their goal is to accelerate the transition to renewable power. By creating a circular economy for EV batteries, Moment extends their lifetime value by using them in second-life applications. As EV batteries still have up to 80% of the capacity left at the end of their life in a vehicle, we prevent toxic battery disposal in landfills and the need to mine lithium for the creation of new batteries.