Endurance Energy Inc., founded in 2024 by former SpaceX engineer Andrew Redd, secured $54 million in funding to advance its pioneering geothermal power technology that harnesses heat from undersea volcanoes along the ocean floor.
- Develops geothermal generators for undersea volcanic heat
- Plans grid-scale power from ocean-based magma hotspots
- Raised $54M led by Founders Fund to fund growth
What happened
Endurance Energy, a Seattle-based startup established in 2024 by ex-SpaceX engineer Andrew Redd, announced it raised $54 million in new financing to develop offshore geothermal power systems. The company is advancing technology to drill into the seabed near undersea volcanoes where tectonic activity creates extremely high heat suitable for electricity generation.
Having conducted four prototype tests at depths of nearly 1,000 feet on the ocean floor, Endurance plans to deploy its first complete 100-kilowatt generator named Adelie at the Juan de Fuca ridge later this year. The system integrates drilling, heat capture, power generation, and electricity transmission back to shore, with ambitions to scale production to the gigawatt level within two years.
Why it matters
Geothermal energy is a promising source of stable, carbon-free power but has been limited by geographic and logistical challenges, as most projects rely on land-based drilling in remote areas. Endurance’s approach targets the substantial untapped geothermal potential beneath the ocean floor, especially along the Pacific 'Ring of Fire,' which could yield approximately 6 terawatts over the next decade.
This development comes amid rising interest from investors and industries in sustainable energy sources that provide reliable baseload power for data centers, electric vehicles, and heavy industrial processes. By unlocking geothermal energy from undersea volcanic zones, Endurance could help transform renewable energy infrastructure and coastal power grids.
What to watch next
Key milestones include Endurance’s planned deployment of its Adelie system, which will demonstrate the viability of its integrated generation and power transmission for offshore geothermal energy. Progress in scaling this technology to gigawatt capacity will be critical to validating its commercial potential and impact on power markets.