CleanTech companies

Critical Energy Systems designs and builds factory-made, modular power plants that convert geothermal and waste heat into grid-scale electricity using custom tu…

Commonwealth Fusion Systems develops compact tokamak fusion power plants using high-temperature superconducting magnets to generate clean energy.

VÃÆRIDION is developing a fully electric nine-passenger aircraft called the Microliner for regional air travel, with a range of 400 km and sub-40-minute chargin…

Helion develops pulsed magneto-inertial fusion technology to build commercial fusion power plants for clean electricity generation.

Panthalassa is a public-benefit corporation building autonomous ocean-based platforms that generate terawatt-scale clean energy from open-ocean waves, combining…

Zap Energy is developing compact fission and fusion power systems using sheared-flow-stabilized Z-pinch technology to deliver carbon-free energy.

Kairos Power is a U.S. nuclear energy company developing fluoride salt-cooled high-temperature reactors using TRISO fuel, with demonstration reactors under cons…

Type One Energy is a fusion energy startup developing and commercializing stellarator-based power plants, including a project for the first grid-scale commercia…

Oklo is a public nuclear energy company developing advanced fast fission power plants and nuclear waste recycling technology.

Atomarine designs and manufactures floating data center platforms cooled by seawater and powered by nuclear ships, enabling rapid, location-agnostic deployment…

Xcimer Energy is an inertial fusion company developing excimer-based laser fusion technology to commercialize safe, affordable, and carbon-free fusion energy.

Radiant Nuclear is developing mass-produced portable nuclear microreactors to replace diesel generators for remote and critical infrastructure.

Valar Atomics is a nuclear energy startup building standardized high-temperature gas reactors on gigasites for industrial power, hydrogen, and clean fuels, and…

Mantis Space builds orbital power infrastructure using laser transmission technology to deliver continuous energy to satellites and spacecraft.

Gritt uses robotics and AI to automate physically demanding outdoor construction tasks, initially targeting solar energy infrastructure projects in the United S…

Heart Aerospace develops hybrid-electric regional aircraft, including the ES-30 airliner, aimed at reducing emissions and operating costs in short-haul commerci…