Panthalassa has raised $140 million in a new funding round led by Peter Thiel, a deal that lifts the U.S.-based startup’s valuation close to $1 billion as it pushes ahead with plans to power floating data centers from the ocean. The company, which designs nodes that sit on top of the water with nearly 280-foot-long steel structures extending below the surface, says its hermetically sealed AI server is cooled by seawater around it.
The funding was announced earlier this month and comes as demand for ai news keeps climbing alongside the need for more computing power. Panthalassa has spent years designing its Ocean-1 and Ocean-2 prototypes, starting in 2021, and now plans to deploy Ocean-3 in the northern Pacific Ocean this year. Commercial deployment is expected to follow in 2027.
Garth Sheldon-Coulson, the company’s founder, has cast the open ocean as one of the few places left with real room to grow. “There are three sources of energy on the planet with tens of terawatts of new capacity potential: solar, nuclear, and the open ocean,” he said. In another statement, he said the company has built a platform that works in the planet’s most energy-dense wave regions, far from shore, and turns that resource into reliable clean power.
The pitch arrives at a moment when the U.S. data center boom is running into a harder reality. Surging AI demand has collided with an aging grid system that is vulnerable to extreme weather, while Wood Mackenzie said earlier this year that data center development has slowed because electricity capacity is not growing fast enough. Ocean-based compute is part of a wider hunt for places to build more capacity without putting more strain on land-based infrastructure.
Thiel’s backing also fits a pattern that reaches back nearly two decades. In 2008, he donated $500,000 to The Seasteading Institute, and Founders Fund backed Panthalassa in 2018. He has kept an interest in ocean-based ventures for years, and his support now gives Panthalassa both money and a powerful signal as it tries to move from prototype to commercial scale. “The future demands more compute than we can imagine. Extra-terrestrial solutions are no longer science fiction. Panthalassa has opened the ocean frontier,” Thiel said in the company’s announcement.
What comes next is straightforward and difficult at the same time: Panthalassa has to prove that a fleet of floating data centers can survive the open ocean, carry useful computing loads, and do it at a cost that makes sense beyond the demo stage. The company is betting that the waves can become infrastructure.
