Thea Energy
Founded 2022 · 113 employees on LinkedIn · 9 known investors
Thea Energy develops fusion energy systems based on a stellarator architecture that replaces complex 3D magnet coils with arrays of mass-manufacturable planar magnets controlled by software. Its first system, Eos, is a neutron source stellarator intended to demonstrate fusion performance and de-risk its planned fusion power plant, Helios.
Founders & leadership
Thea Energy was founded in 2022 by Matt Miller.
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Matt Millerinco-founder and chairman2023–2026Matt Miller is the founder of Thea Energy, a fusion energy company developing a software-controlled stellarator built from arrays of mass-manufacturable planar magnets. He has a background in the communications, semiconductor, and nanotechnology sectors, contributed to the development and standardization of digital TV, HDTV, and broadband cable, and has worked as a venture capital consultant and served on public and private company boards.
Investors · 9
Beyond Earth VenturesWilmington · $500K – $2M
Emerald Technology Ventures AgZurich · $540K – $5.4M
Hitachi VenturesMunich
Linse CapitalSan Juan
LOWERCARBONJackson · $1M – $50M
Lowercarbon CapitalNew York · $100K – $5M
Prelude VenturesSan Francisco · $100K – $5M
VoLo Earth VenturesSnowmass Village · $2M
Starlight VenturesreportedMiami · $100K – $3M
Funding
SEC filings, press & company announcements- Undisclosed amountSeries BMay 2026Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Competitors · 8
by search overlap
Tri Alpha Energy19 shared keywordsTAE Technologies develops hydrogen-boron (aneutronic) fusion power using a beam-driven Field-Reversed Configuration reactor design, aiming to deliver utility-scale fusion electricity to the grid in the early 2030s. Through its subsidiaries, the company also works on grid energy storage solutions and cancer treatment technologies.
F17 shared keywordsFuse Energy develops fusion energy technology, with work spanning hardened electronics and radiation testing (HEART) and recycling of radioactive waste, aiming to provide an on-demand clean energy source. It brings together a team across engineering, fusion science, energy policy, and manufacturing.
Helion Energy17 shared keywordsHelion develops fusion energy systems designed to generate clean electricity for commercial use. The company builds pulsed magnetic fusion prototypes with applications for industrial and commercial electricity generation.
Pacific Fusion14 shared keywordsPacific Fusion is developing a high-gain pulsed magnetic inertial fusion system designed to achieve net facility gain, using a modular fast electric pulser, a meter-scale fusion chamber, and small fuel containers. The company aims to produce affordable, on-demand fusion power to meet global energy demand and address climate change.
General Fusion13 shared keywordsGeneral Fusion develops Magnetized Target Fusion (MTF) technology, combining plasma physics, mechanical compression, and liquid metal systems to build a practical, cost-competitive fusion power plant. The company operates large-scale demonstration machines, including LM26 at its Vancouver facility, on a roadmap toward a first fusion plant producing energy in the mid-2030s.
Commonwealth Fusion Systems12 shared keywordsCommonwealth Fusion Systems develops commercial fusion power plants using high-temperature superconducting magnet technology to provide grid-scale energy.
Avalanche Energy12 shared keywordsAvalanche Energy develops compact fusion technology to generate high-energy neutrons for materials testing, radioisotope production, and advanced nuclear battery systems serving defense, space, and commercial power applications. The company also provides high-voltage vacuum components and operates FusionWERX, a commercial-scale fusion testing facility.
Type One Energy11 shared keywordsType One Energy develops stellarator fusion technology for grid-scale power generation. The company partners with energy producers to commercialize and deploy commercial fusion power plants.
Companies competing with Thea Energy for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
US fusion reactor firm scales flat superconducting magnets with fundinginterestingengineering.com · Aug 2026
Thea Energy Extends Series B Funding After Earlier $100 Million Round | energynews.proenergynews.pro · Aug 2026
Thea Energy Extends Series B Funding to Deploy Efficient and Economical Fusion Power | The Manila Timesmanilatimes.net · Aug 2026Frequently asked questions
- What does Thea Energy do?
- Thea Energy develops fusion energy systems based on a stellarator architecture that replaces complex 3D magnet coils with arrays of mass-manufacturable planar magnets controlled by software. Its first system, Eos, is a neutron source stellarator intended to demonstrate fusion performance and de-risk its planned fusion power plant, Helios.
- Who founded Thea Energy?
- Thea Energy was founded by Matt Miller in 2022.
- Who are Thea Energy's investors?
- Thea Energy's investors include Beyond Earth Ventures, Emerald Technology Ventures Ag, Hitachi Ventures, Linse Capital, LOWERCARBON, Lowercarbon Capital, Prelude Ventures, VoLo Earth Ventures and 1 more.