# Nuclear Energy Market Map 2026: 45 Startups in 4 Segments > Market map of 45 nuclear energy startups worldwide in 4 segments, from fusion, small modular and micro reactors and fission reactors on. Source: https://millionrounds.com/market-maps/nuclear-energy-market-map (Millionrounds; every figure on the page links to its filing or article) ## Fusion 25 - [Kyoto Fusioneering](https://millionrounds.com/company/kyoto-fusioneering) - [Pacific Fusion](https://millionrounds.com/company/pacific-fusion) - [Proxima Fusion](https://millionrounds.com/company/proxima-fusion) - [Helion Energy](https://millionrounds.com/company/helion-energy) - [General Fusion](https://millionrounds.com/company/general-fusion) - [First Light Fusion](https://millionrounds.com/company/first-light-fusion) - [Startous fusion](https://millionrounds.com/company/startous-fusion) - [Zap Energy](https://millionrounds.com/company/zap-energy) - [Thea Energy](https://millionrounds.com/company/thea-energy) - [Type One Energy](https://millionrounds.com/company/type-one-energy) - [Energy Singularity](https://millionrounds.com/company/energy-singularity) - [Marvel Fusion](https://millionrounds.com/company/marvel-fusion) - [Astral Systems](https://millionrounds.com/company/astral-systems) - [Realta Fusion](https://millionrounds.com/company/realta-fusion) - [Mach42](https://millionrounds.com/company/mach42) - [Tokamak Energy](https://millionrounds.com/company/tokamak-energy) - [Gauss Fusion](https://millionrounds.com/company/gauss-fusion) - [Fusionality](https://millionrounds.com/company/fusionality) - [Marathon Fusion](https://millionrounds.com/company/marathon-fusion) - [Molten Salt Solutions](https://millionrounds.com/company/molten-salt-solutions) - [ExoFusion](https://millionrounds.com/company/exofusion) - [Qdot Technology](https://millionrounds.com/company/qdot-technology) - [Tibbar Plasma Technologies](https://millionrounds.com/company/tibbar-plasma-technologies) - [MuWave](https://millionrounds.com/company/muwave) +1 more ## Small modular and micro reactors 7 - [Oklo](https://millionrounds.com/company/oklo) - [Rolls-Royce SMR](https://millionrounds.com/company/rolls-royce-smr) - [Bluecore Energy](https://millionrounds.com/company/bluecore-energy) - [Blykalla](https://millionrounds.com/company/blykalla) - [Calogena](https://millionrounds.com/company/calogena) - [Blue Capsule Technology](https://millionrounds.com/company/blue-capsule-technology) - [*M* m2p-labs](https://millionrounds.com/company/m2p-labs) ## Fission reactors 7 - [Valar Atomics](https://millionrounds.com/company/valar-atomics) - [Deep Fission](https://millionrounds.com/company/deep-fission) - [NuCube Energy](https://millionrounds.com/company/nucube-energy) - [Fission](https://millionrounds.com/company/fission) - [Blossom Energy](https://millionrounds.com/company/blossom-energy) - [Applied Atomics](https://millionrounds.com/company/applied-atomics) - [Veracity Nuclear](https://millionrounds.com/company/veracity-nuclear) ## Nuclear fuel 6 - [Standard Nuclear](https://millionrounds.com/company/standard-nuclear) - [Project Omega](https://millionrounds.com/company/project-omega) - [Uranium Royalty](https://millionrounds.com/company/uranium-royalty) - [General Matter](https://millionrounds.com/company/general-matter) - [Deep Isolation](https://millionrounds.com/company/deep-isolation) - [Thorizon](https://millionrounds.com/company/thorizon) ## Segment by segment ### Fusion 25 startups · $4.4B raised - [**Kyoto Fusioneering**](https://millionrounds.com/company/kyoto-fusioneering) Kyoto Fusioneering Ltd. Japan $1.3B - [**Pacific Fusion**](https://millionrounds.com/company/pacific-fusion) Pacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes. United States $900M - [**Proxima Fusion**](https://millionrounds.com/company/proxima-fusion) Proxima Fusion is a European fusion energy company based in Munich, Germany, founded in 2023 as the first spin-out from the Max Pl Germany $636M - [**Helion Energy**](https://millionrounds.com/company/helion-energy) Helion Energy is a fusion power company developing the world's first fusion generators, enabling a future with unlimited clean energy. United States $437M - [**General Fusion**](https://millionrounds.com/company/general-fusion) General Fusion develops commercial fusion energy using Magnetized Target Fusion technology. Canada $241M - [**First Light Fusion**](https://millionrounds.com/company/first-light-fusion) First Light Fusion is a British company based in Oxfordshire, focused on developing innovative solutions for fusion energy through United Kingdom $167M - [**Startous fusion**](https://millionrounds.com/company/startous-fusion) Startous fusion focuses on commercializing fusion energy aiming to build commercial controllable fusion reactor. China $143M - [**Zap Energy**](https://millionrounds.com/company/zap-energy) Zap Energy is an American company founded in 2017, headquartered in Everett, Washington, with research facilities in Mukilteo and Seattle. United States $130M ### Small modular and micro reactors 7 startups · $2.8B raised - [**Oklo**](https://millionrounds.com/company/oklo) About Oklo Inc.: Oklo Inc. United States $1.4B - [**Rolls-Royce SMR**](https://millionrounds.com/company/rolls-royce-smr) Rolls-Royce SMR specializes in producing factory-built nuclear power plants and offers sustainable, low-cost energy solutions. United Kingdom $1.2B - [**Bluecore Energy**](https://millionrounds.com/company/bluecore-energy) Bluecore Energy designs and builds compact, zero-emission small modular nuclear reactors on floating barges. United States $69M - [**Blykalla**](https://millionrounds.com/company/blykalla) Blykalla is a Swedish deep-tech company founded in 2013, specializing in lead-cooled small modular reactors (SMRs) to provide safe Sweden $50M - [**Calogena**](https://millionrounds.com/company/calogena) Calogena is a French technology company founded in 2021, specializing in the design and deployment of Small Modular Reactors (SMRs France $45M - [**Blue Capsule Technology**](https://millionrounds.com/company/blue-capsule-technology) Blue Capsule Technology is a French start-up founded in 2022, focused on developing a modular, high-temperature small modular reactor (SMR). France $2.2M - [*M* **m2p-labs**](https://millionrounds.com/company/m2p-labs) m2p-labs is a biotechnology company that provides microreactor and biochemical engineering solutions. Germany $768K ### Fission reactors 7 startups · $1.7B raised - [**Valar Atomics**](https://millionrounds.com/company/valar-atomics) Valar Atomics is a U.S.-based advanced nuclear energy startup founded in 2023 and headquartered in El Segundo, California. United States $1.6B - [**Deep Fission**](https://millionrounds.com/company/deep-fission) Deep Fission is transforming the energy landscape by installing modular nuclear power reactors a mile deep. United States $80M - [**NuCube Energy**](https://millionrounds.com/company/nucube-energy) We are an innovative company that will transform how nuclear fission is used to power our society. United States $29M - [**Fission**](https://millionrounds.com/company/fission) Fission is a software development company located in Vancouver, Canada. United States $10M - [**Blossom Energy**](https://millionrounds.com/company/blossom-energy) Blossom Energy is a manufacturing company that develops advanced nuclear reactors that can produce clean energy. Japan $4.4M - [**Applied Atomics**](https://millionrounds.com/company/applied-atomics) Applied Atomics is a private company focused on nuclear power infrastructure and space propulsion. United Kingdom $4.0M - [**Veracity Nuclear**](https://millionrounds.com/company/veracity-nuclear) Veracity Nuclear specializes in nuclear reactor software and engineering analysis services for the nuclear power industry. United States $1.1M ### Nuclear fuel 6 startups · $395M raised - [**Standard Nuclear**](https://millionrounds.com/company/standard-nuclear) Standard Nuclear manufactures advanced nuclear fuel for next-generation reactors and high-temperature applications. United States $140M - [**Project Omega**](https://millionrounds.com/company/project-omega) Project Omega is a nuclear technology startup founded in 2026 and headquartered in Rhode Island. United States $92M - [**Uranium Royalty**](https://millionrounds.com/company/uranium-royalty) Uranium Royalty is a pure-play uranium royalty company that focuses on the uranium and nuclear energy sectors. Canada $63M - [**General Matter**](https://millionrounds.com/company/general-matter) General Matter is a nuclear energy company that produces enriched uranium fuel for nuclear energy applications. United States $50M - [**Deep Isolation**](https://millionrounds.com/company/deep-isolation) Deep Isolation is an innovator in nuclear waste disposal technology, founded in 2016 in Berkeley, California. United States $33M - [**Thorizon**](https://millionrounds.com/company/thorizon) THORIZON is a European deep-tech nuclear company focused on developing next-generation Molten Salt Reactors (MSR) that utilize Tho Netherlands $18M **How this map is made.** Every startup here has raised money in rounds we track. It joins the map when its sectors, read from its rounds, or the opening of its own description say it works in nuclear energy, and goes to the first segment whose words it carries. Each segment shows its best-funded first. Rebuilt nightly; updated 15 November 2026. ## More market maps [All maps](https://millionrounds.com/market-maps) [**Cybersecurity** 817 startups · 9 segments · $33B](https://millionrounds.com/market-maps/cybersecurity-market-map)[**Agritech** 719 startups · 7 segments · $15B](https://millionrounds.com/market-maps/agritech-market-map)[**HR software** 664 startups · 8 segments · $13B](https://millionrounds.com/market-maps/hr-software-market-map)[**CFO tech stack** 564 startups · 6 segments · $19B](https://millionrounds.com/market-maps/cfo-tech-stack-market-map)[**Social and dating apps** 486 startups · 5 segments · $4.1B](https://millionrounds.com/market-maps/social-and-dating-apps-market-map)[**Supply chain tech** 472 startups · 7 segments · $32B](https://millionrounds.com/market-maps/supply-chain-tech-market-map) ## Who backs nuclear energy? Open any company for its rounds and investors, or search the investors behind these startups in the app, with filters, lists and exports. [Find their investors](https://millionrounds.com/login?join=1&next=/app/investors)[Top lists](https://millionrounds.com/top-lists)