Peter Thiel Leads $140 Million Series B for Panthalassa’s Ocean-Powered AI Infrastructure

Panthalassa announced today that it has secured $140 million in Series B financing to scale its ocean-based computing platform. The funding round was led by Peter Thiel and included participation from institutional investors such as John Doerr, Marc Benioff’s TIME Ventures, and Susquehanna Sustainable Investments.

The capital is earmarked for the completion of a pilot manufacturing facility near Portland, Oregon, and the accelerated deployment of the company’s Ocean-3 series nodes. These autonomous units are designed to host AI inference workloads at sea, utilizing energy harvested directly from ocean waves.

By deploying compute nodes offshore, the company aims to operate independently of terrestrial grid constraints and land use limitations.

The Series B round attracted a range of strategic and venture backers, including Super Micro Computer, Hanwha Group, and Max Levchin’s SciFi Ventures. Returning investors include Founders Fund, Gigascale Capital, and Lowercarbon Capital. The involvement of hardware providers like Super Micro suggests a focus on the specialized, ruggedized hardware required for maritime deployments.

Panthalassa’s approach targets the open ocean as a multi-terawatt energy resource for high-density computing. Garth Sheldon-Coulson, Co-Founder and CEO of Panthalassa, stated that the ocean represents one of three primary energy sources with the potential for tens of terawatts of new capacity.

The Ocean-3 nodes are intended to provide a scalable infrastructure for AI applications as global power demand continues to rise. This strategy follows a broader trend of AI infrastructure firms seeking "off-grid" power solutions. While firms like Crusoe focus on terrestrial energy storage and vertically integrated "AI factories," Panthalassa’s maritime model attempts to decouple compute growth from traditional utility providers.