fusion-energy
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Inertia Wants to Turn a Fusion Experiment Into a Factory
The fusion shot worked. Now Inertia has to make it happen ten times a second, at a price a power plant can afford. That turns a triumph of physics into a test of factories.
The Fusion Bet That Looks Like a Barbell, Not a Donut
Most fusion companies bend plasma into a ring. Realta Fusion is betting that a straight magnetic bottle - built for industrial heat first - can make the economics less contorted.
The Only Two Bets BlueYard Will Make: Utopia or Oblivion
BlueYard hands early-stage founders a check between $500K and $5M to chase problems most investors call radioactive - fusion reactors, hypersonic defense, decentralized money, engineered cells. Since 2016 it has backed Solana, Groq, IonQ and Filecoin from a partnership split between Berlin and the US.
Thea Energy
Thea Energy is a New Jersey fusion power company building a simplified, mass-manufacturable stellarator. Instead of the exotic, millimeter-precise 3D magnet coils that defined earlier stellarators, Thea uses arrays of small, planar high-temperature-superconductor electromagnets steered by software - shifting complexity from hardware fabrication to control code. Spun out of the Princeton Plasma Physics Laboratory in 2022, the company is building Eos, a neutron-source stellarator meant to prove power-plant-relevant performance and generate near-term revenue, ahead of its first commercial plant, Helios.
Acceleron Fusion, Inc.
Acceleron Fusion is a Cambridge, Massachusetts deep-tech company reviving muon-catalyzed fusion, a phenomenon first observed in the 1950s, as a path to abundant clean energy. Instead of confining a 100-million-degree plasma, Acceleron fires a beam of muons - subatomic particles roughly 200 times heavier than electrons - at highly compressed deuterium-tritium fuel, triggering fusion at temperatures closer to 500-1,000 C. Founded in 2023 by NK Labs veterans Ara Knaian and Seth Newburg and backed by a $24M Series A from Lowercarbon Capital and Collaborative Fund, the company is building two core technologies: a high-efficiency muon source and a high-density fusion cell, with the goal of a fusion power plant that beats natural gas on cost.