Mazama Energy, a geothermal startup backed by Khosla Ventures, has raised $135 million in a funding round announced this week. The capital will be used to advance drilling technology for accessing super-hot-rock geothermal resources, which can provide a more efficient and sustainable source of clean energy. The round reflects growing investor interest in next-generation geothermal solutions.
The funding round was led by Khosla Ventures, with participation from existing and new investors. Mazama Energy plans to deploy the funds to enhance its drilling capabilities, targeting rock temperatures above 400 degrees Celsius, which are hotter than conventional geothermal wells. The company’s approach aims to unlock vast untapped geothermal energy potential by drilling deeper and more precisely.
This investment highlights the increasing focus on geothermal energy as a reliable, low-carbon power source amid global efforts to decarbonize. Mazama Energy’s technology could complement solar and wind by providing stable baseload power. Comparable recent deals in the geothermal sector have drawn attention as governments and private capital seek to diversify clean energy portfolios beyond intermittent renewables.
Mazama Energy’s $135 million raise positions it to scale its drilling projects and technology development. The company has scheduled pilot drilling operations for late 2027 to validate its super-hot-rock geothermal approach, aiming to demonstrate commercial viability and attract further investment.