fusion-energy
(2)
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.