TechCrunch Startup News This startup wants to build a fusion reactor — on a boat; plus, Momentic raises $15M to automate software testing
Nov 24, 2025
Discover how Maritime Fusion plans to revolutionize fusion power by deploying a reactor on a boat, tackling economic and regulatory hurdles. Dive into the benefits of fusion over fission and learn about their ambitious Yensen power plant set for 2032. Then shift gears to Momentic, an AI-driven startup that just raised $15 million to automate software testing, transforming dull tasks into efficient processes. With competitive insights and a focus on customer needs, both ventures are poised to reshape their respective industries.
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Sea-Based Fusion Could Beat Grid Economics
- Maritime Fusion argues putting tokamaks on ships could be a faster commercial path than land-based plants.
- At-sea economics may let early fusion compete with costly marine fuels like ammonia and hydrogen.
Building Superconducting Cables As An Early Revenue Stream
- Maritime Fusion has begun assembling high-temperature superconducting cables from tape bought from suppliers, mostly Japanese firms.
- They plan to sell these cables to other companies while developing their tokamak.
Yensen: A Customer-Facing 30 MW Tokamak
- Maritime's first plant, Yensen, aims for ~30 MW, an 8-meter tokamak and a 2032 operational target at ~$1.1B.
- Justin Cohen frames this as a customer-facing energy-producing device rather than a break-even demo.