Quaise raises $134M for superhot geothermal power
Quaise Energy’s Series B backs a plan to turn superhot geothermal into a broader source of firm power, targeting one of the hardest constraints in the AI era: electricity supply.
The AI infrastructure boom is turning reliable power into one of technology’s biggest bottlenecks.
What happened
Quaise Energy raised $134M in the initial close of its Series B, with additional equity and debt financing expected.
The round was led by Prelude Ventures, with strategic investment from Japanese energy groups JERA and Idemitsu. Nearly all existing investors also participated.
The company is developing utility-scale superhot geothermal technology and says the financing will support construction of what it aims to make the world’s first superhot geothermal power plant.
Why it matters
Conventional geothermal is geographically constrained because projects need accessible heat and suitable underground conditions.
Quaise is betting that much deeper, hotter resources can be reached and used more broadly. If that becomes commercially viable, geothermal could provide firm power in more locations rather than remaining a niche resource tied to a small number of natural hotspots.
The challenge is substantial. Deep drilling, materials performance and project economics all become harder at extreme temperatures and depths.
The bigger picture
Energy is becoming part of the core technology stack.
AI data centres, electrification and industrial demand are all increasing pressure on grids, pushing capital into nuclear, geothermal, storage and fusion. Quaise’s round shows how once-specialised energy technologies are becoming strategic infrastructure bets.