Deep Fission, Inc. develops and deploys small modular nuclear reactors placed deep underground to generate electricity. Its reactors are designed for installation at a depth of one mile, providing carbon-free energy and capacity solutions. The company offers scalable configurations for onsite power or flexible offtake agreements in wholesale power markets, manages licensing with regulatory authorities, and supports decarbonization and reliability goals. It also provides advisory and partnership services for deployment and operation, using artificial intelligence to streamline operations. Deep Fission serves utilities, data centers, heavy industry, the military, government, and large cities. Founded in 2023, it is based in Berkeley, California.