Maritime Fusion

Fusion reactors for ships

Y CombinatorWinter 2025ActiveIndustrialsEnergyFusion EnergyHard TechEnergy

What they do

Problem

Global shipping and remote/off-grid sites need scalable, low-carbon power sources that avoid the cost and operational constraints of early grid-scale fusion plants.

Solution

The company is developing HTS tokamak fusion reactors optimized for ships and off-grid power, while commercializing high-temperature superconducting cable technology for power distribution.

Who it's for

Commercial shipping operators and off-grid/remote energy users needing clean high-power generation and distribution.

Founders

Justin Cohen

Founder

Nuclear engineer and plasma physicist working on fusion reactors for defense and commercial shipping applications. Previously Tesla, SpaceX, Columbia University, Princeton Plasma Physics Laboratory, NC State.

Jason Kaufmann

Founder

I'm a hardware engineer with a passion for building cool electronics and systems. With a background in physics and computer engineering from Penn, I've worked on everything from AI hardware at Tesla to power systems for rockets at SpaceX. Currently focused on making a fusion reactor for ships.