Next-generation geothermal’s rapid growth
January 31, 2026
Investment in next generation geothermal has grown by 70% or more each year since 2020. Two prominent technologies have made the largest advancements over the past few years: closed-loop geothermal and enhanced geothermal. Unlike traditional geothermal which needs to tap into an underground water source, closed-loop geothermal circulates fluid through a fully sealed loop and just needs hot rock. Enhanced geothermal systems on the other hand borrow techniques from the oil and gas industry of directional drilling and hydraulic fracturing (fracking) to create an artificial geothermal reservoir in any location with underground heat. In December 2025, Fervo Energy, one of the industry's leading enhanced geothermal companies, closed a $462 million Series E funding round. Source: IEA.