Market map · Worldwide

Nuclear energy market map

45 nuclear energy startups worldwide that have raised money in rounds we track, placed in 4 segments by what each says it does. Together they have raised $9.3B; the biggest segment is fusion, with 25 companies.

45startups on the map
4segments
$9.3Braised between them
Fusionmost funded segment

Fusion

25

+1 more

Small modular and micro reactors

7

Fission reactors

7

Nuclear fuel

6

Segment by segment

Fusion

25 startups · $4.4B raised

  1. Kyoto FusioneeringKyoto Fusioneering Ltd.Japan$1.3B
  2. Pacific FusionPacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes.United States$900M
  3. Proxima FusionProxima Fusion is a European fusion energy company based in Munich, Germany, founded in 2023 as the first spin-out from the Max PlGermany$636M
  4. Helion EnergyHelion Energy is a fusion power company developing the world's first fusion generators, enabling a future with unlimited clean energy.United States$437M
  5. General FusionGeneral Fusion develops commercial fusion energy using Magnetized Target Fusion technology.Canada$241M
  6. First Light FusionFirst Light Fusion is a British company based in Oxfordshire, focused on developing innovative solutions for fusion energy throughUnited Kingdom$167M
  7. Startous fusionStartous fusion focuses on commercializing fusion energy aiming to build commercial controllable fusion reactor.China$143M
  8. Zap EnergyZap 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

  1. OkloAbout Oklo Inc.: Oklo Inc.United States$1.4B
  2. Rolls-Royce SMRRolls-Royce SMR specializes in producing factory-built nuclear power plants and offers sustainable, low-cost energy solutions.United Kingdom$1.2B
  3. Bluecore EnergyBluecore Energy designs and builds compact, zero-emission small modular nuclear reactors on floating barges.United States$69M
  4. BlykallaBlykalla is a Swedish deep-tech company founded in 2013, specializing in lead-cooled small modular reactors (SMRs) to provide safeSweden$50M
  5. CalogenaCalogena is a French technology company founded in 2021, specializing in the design and deployment of Small Modular Reactors (SMRsFrance$45M
  6. Blue Capsule TechnologyBlue Capsule Technology is a French start-up founded in 2022, focused on developing a modular, high-temperature small modular reactor (SMR).France$2.2M
  7. Mm2p-labsm2p-labs is a biotechnology company that provides microreactor and biochemical engineering solutions.Germany$768K

Fission reactors

7 startups · $1.7B raised

  1. Valar AtomicsValar Atomics is a U.S.-based advanced nuclear energy startup founded in 2023 and headquartered in El Segundo, California.United States$1.6B
  2. Deep FissionDeep Fission is transforming the energy landscape by installing modular nuclear power reactors a mile deep.United States$80M
  3. NuCube EnergyWe are an innovative company that will transform how nuclear fission is used to power our society.United States$29M
  4. FissionFission is a software development company located in Vancouver, Canada.United States$10M
  5. Blossom EnergyBlossom Energy is a manufacturing company that develops advanced nuclear reactors that can produce clean energy.Japan$4.4M
  6. Applied AtomicsApplied Atomics is a private company focused on nuclear power infrastructure and space propulsion.United Kingdom$4.0M
  7. Veracity NuclearVeracity 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

  1. Standard NuclearStandard Nuclear manufactures advanced nuclear fuel for next-generation reactors and high-temperature applications.United States$140M
  2. Project OmegaProject Omega is a nuclear technology startup founded in 2026 and headquartered in Rhode Island.United States$92M
  3. Uranium RoyaltyUranium Royalty is a pure-play uranium royalty company that focuses on the uranium and nuclear energy sectors.Canada$63M
  4. General MatterGeneral Matter is a nuclear energy company that produces enriched uranium fuel for nuclear energy applications.United States$50M
  5. Deep IsolationDeep Isolation is an innovator in nuclear waste disposal technology, founded in 2016 in Berkeley, California.United States$33M
  6. ThorizonTHORIZON is a European deep-tech nuclear company focused on developing next-generation Molten Salt Reactors (MSR) that utilize ThoNetherlands$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.

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