Startup Endurance Energy Raises $54M to Harness Ocean Geothermal Energy

Former SpaceX engineer Andrew Redd founded Endurance Energy, a startup aiming to harness geothermal energy from the ocean. The company raised $54 million in a Series A round led by Founders Fund, with participation from Point72 Ventures, Construct Capital, and other investors. The funds will be used to develop underwater power plants capable of generating hundreds of gigawatts of energy.

Endurance Energy plans to utilize heat from tectonic plate divergence zones, such as the Pacific Ring of Fire. In these regions, magma rises close to the surface, making them ideal for geothermal energy extraction. According to Redd, up to 6 terawatts of energy could be harnessed within the next 5–10 years, meeting the needs of major coastal cities.

The project faces technical challenges, including equipment corrosion in saltwater, high pressure at depth, and the need for robotic automation. However, Redd is confident these issues are solvable, citing the oil and gas industry's experience in underwater drilling. Unlike oil, leaks of hot water from geothermal sources pose minimal risk to ecosystems.

The Endurance Energy team consists of 25 members, 12 of whom previously worked at SpaceX. The Vice President of Engineering was formerly with Helion Energy, a fusion energy startup. The project aims to address the rising energy demands of data centers, electric vehicles, and industrial sectors.