Solar Energy 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…

Cosmic Robotics builds autonomous construction robots for utility-scale solar farms, backed by Y Combinator.

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

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

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

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

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

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

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

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

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

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

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

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

Cowboy Space Corp. builds satellite infrastructure in Low Earth Orbit for space-based power generation, energy transmission via infrared lasers, and optical dat…

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

General Matter is a U.S. nuclear-fuel startup focused on domestic uranium enrichment to produce LEU and HALEU for reactors, supporting American energy independe…

General Galactic is a deep-tech startup developing water-based propulsion systems and spacecraft for in-space mobility and energy logistics using electrolysis.