Radiant

TAE Technologies, founded in 1998 in Foothill Ranch, California, USA, develops fusion energy systems capable of delivering on-demand clean energy with no radioactive waste or meltdown risk. The breakthrough in the company's 'Norm' technology—achieving stable plasma at over 70 million degrees Celsius in a simplified fusion device—was achieved in part through TAE's decade-long collaboration with Google.

Acceleron Fusion was founded in 2023 in Cambridge, Massachusetts, as a spinout from NK Labs. The company develops clean energy systems using muon-catalyzed fusion technology, enabling fusion reactions at temperatures below 1,000°C, and has received two ARPA-E grants.

Beijing ENN Fusion Energy Technology Co., Ltd. is a subsidiary of ENN Group and one of China's earliest private enterprises to pursue commercial fusion energy development. Since 2017, the company has focused on a hydrogen-boron fusion approach targeting neutron-free, low-cost, and commercializable fusion. Headquartered in Beijing and using a spherical tokamak technology path, it has independently designed and built two generations of experimental devices—'XuanLong-50' and 'XuanLong-50U.' In 2025, XuanLong-50U achieved mega-ampere-level hydrogen-boron plasma discharge. Cumulative investment exceeds 4 billion RMB, with a team of approximately 300.

Helion, founded in 2013 in Everett, Washington, develops fusion energy generators that produce electricity through nuclear fusion.

Thera Energy, founded in 2022 in Princeton, New Jersey, designs a novel fusion reactor using programmable magnets to redefine global energy supply.

Zap Energy, founded in 2017 in Everett, Washington, generates fusion energy by driving electrical current through plasma.