Avalanche Energy is pursuing a radically miniaturized approach to nuclear fusion, building reactors as small as nine centimeters in diameter that confine plasma with high-voltage electric fields augmented by modest magnets. By keeping devices tiny, the team can test design changes multiple times per week, dramatically speeding learning cycles compared with multi-story tokamaks or laser arrays. A forthcoming 25-centimeter reactor is projected to generate about 1 MW of fusion power and deliver longer confinement times needed to push the system past breakeven (Q>1). The company operates FusionWERX, a commercial test facility it also rents to peer fusion startups, and expects the site to be licensed to handle tritium fuel by 2027. CEO Robin Langtry, who co-founded Avalanche after working at Blue Origin, believes the firm’s timeline is on par with larger efforts like Commonwealth Fusion Systems and Helion, anticipating industry-wide milestones between 2027 and 2029. Financially, Avalanche has collected $80 million in total funding to date—relatively modest in a sector where rivals have raised hundreds of millions to several billions of dollars. The company’s strategy relies on capital efficiency through small-scale hardware rather than the massive, costly builds typical of fusion research.

Total raised

$84M

Funding rounds

3

Latest round

Equity

Latest activity

Feb 2026