Geothermal
4 companies
Fervo Energy
FeaturedUSA
Fervo is rapidly gaining a great deal of interest, not least raising over $400m in Dec 2025 to accelerate the development of their Cape Station geothermal project.
In their projects, cold water is pumped underground, heated up by the Earth’s temperature, and brought back to the surface. Modern Organic Rankine Cycle generating technology converts the geothermal energy into electricity in a highly efficient process that emits no carbon or other harmful pollutants. Using this technology, 100% of the water is reinjected back into the ground.
Pretty basic. Pretty clever.
Investors
Eavor
Canada
Eavor has developed a closed-loop geothermal system that circulates fluid through deep underground radiator-like loops — delivering 24/7 dispatchable heat and power from almost any location.
Quidnet Energy
USA
Quidnet Energy stores energy by pumping water underground into pressurised rock formations using well-drilling technology — a modular, geography-independent form of long-duration storage that works like pumped hydro but deployable almost anywhere.
Sage Geosystems
USA
Sage Geosystems is a Houston-based startup pioneering pressure geothermal — a technology that enables 24/7 baseload power generation and long-duration energy storage from hot dry rock formations anywhere in the world.