Maritime Fusion
Fusion reactors for ships
Founders
Not read from YC yet; the weekly run fills these in.
Same space
Competitors
Closest in what they build, same category.
Adjacent
Overlapping tags, a different niche.
EnodeW21Energy Orchestration PlatformShared: energyActive
FerveretS21Nuclear-inspired cooling that turns wasted power into more AI computeShared: energyActive
AtomarineS26Floating nuclear powered data centers at sea.Shared: energyActive
NODI EnergyX25Distributed energy infrastructure unlocking grid power to data centersShared: energyActive
Voxel EnergyW26Energy independent data centers with solar and repurposed batteries.Shared: energyActive
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Batchmates in Winter 2025.
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About Maritime Fusion
Maritime Fusion is building fusion reactors for ships and off grid energy markets. En route on this endeavor we’re commercializing High Temperature Superconducting (HTS) cable technology for power distribution while advancing the physics basis of our HTS tokamak to decarbonize global shipping. Breakeven fusion is coming soon, but the first-of-a-kind (FOAK) reactors will be costly, high maintenance, and have low capacity factors, leading to 5–10x higher electricity cost on the grid. Maritime Fusion is pursuing the most widely accepted approach to fusion, the tokamak, but specifically designed for the marine environment where the challenges that arise between breakeven and a commercially viable energy source are alleviated. The market we're targeting requires 15x less power, lower up-time, and costs the same as alternative fuels but without any emissions. Since fusion does not use highly radioactive fuels or materials – unlike fission – we sidestep the vast majority of regulatory challenges and safety risks associated with nuclear energy. Our team brings over a decade of industry and research experience in plasma physics, nuclear engineering, and electrical engineering with backgrounds at SpaceX, Tesla, Columbia University, and University of Pennsylvania.
San Francisco, CA, USA
Maritime Fusion: questions
Which YC batch was Maritime Fusion in?
Maritime Fusion was in Y Combinator's Winter 2025 batch (W25).
Is Maritime Fusion still active?
Y Combinator lists Maritime Fusion as active.
Where is Maritime Fusion based?
Maritime Fusion lists San Francisco, CA, USA as its location on YC's directory.
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