Kairos Power vs TerraPower
October 15, 2025
Kairos Power ($629M)
TerraPower ($1.5B)
Kairos Power and TerraPower are both American startups developing next-gen nuclear reactors. Their goal is safe, affordable and sustainable carbon-free energy. They produce serial modular reactors with advanced cooling systems and materials.
But Kairos Power (founded in 2016) is developing a Fluoride Salt-Cooled High-Temperature reactor, which uses fluoride salt as a coolant. This is smaller modular reactor (SMR) that offers the advantage of low cost and a rapid development cycle. The project is supported by the US Department of Energy.
TerraPower (2008) is collaborating with GE Hitachi to develop a sodium-cooled fast reactor with thermal storage, which uses liquid sodium as a coolant. The company emphasizes integration with renewable energy sources to balance their uneven energy production. The company's primary investor is Bill Gates.
But Kairos Power (founded in 2016) is developing a Fluoride Salt-Cooled High-Temperature reactor, which uses fluoride salt as a coolant. This is smaller modular reactor (SMR) that offers the advantage of low cost and a rapid development cycle. The project is supported by the US Department of Energy.
TerraPower (2008) is collaborating with GE Hitachi to develop a sodium-cooled fast reactor with thermal storage, which uses liquid sodium as a coolant. The company emphasizes integration with renewable energy sources to balance their uneven energy production. The company's primary investor is Bill Gates.
★
See also:
