Naver announced the investment on August 13 but did not disclose the amount. The move gives Naver exposure to a technology that combines renewable ocean energy, offshore computing and seawater cooling in a single infrastructure concept.
Panthalassa is developing autonomous offshore computing systems designed to generate electricity from ocean waves and use that power to run AI workloads at sea. The company says its approach could reduce dependence on land-based power infrastructure while using the surrounding ocean for cooling.
The investment comes as AI companies face a growing infrastructure problem. Advanced AI models require large amounts of electricity and computing capacity, while building new data centres on land can face constraints around grid connections, power availability, cooling and construction.
Panthalassa's technology is built around offshore nodes that combine power generation and computing. The company has been developing the systems as a way to move some AI inference workloads away from traditional data-centre locations and closer to a renewable energy source.
The startup raised $140 million in Series B funding in May. The round was led by Peter Thiel and included investors such as John Doerr, Marc Benioff's TIME Ventures, Fortescue Ventures, Super Micro Computer and returning investors including Founders Fund and Lowercarbon Capital, according to Panthalassa's financing announcement.
The funding was intended to complete Panthalassa's pilot manufacturing facility near Portland, Oregon, and accelerate deployment of its Ocean-3 systems. The company said those systems would perform AI inference computing at sea using electricity generated from ocean waves.
The concept could offer another advantage beyond electricity generation. Data-centre operators normally need substantial cooling infrastructure because AI processors generate significant heat. Panthalassa's offshore approach uses seawater as part of its cooling strategy, potentially reducing the need for conventional cooling systems.
For Naver, the investment fits into a broader push to expand AI infrastructure. The company is already developing large-scale AI computing capacity in South Korea with Nvidia and Brookfield, with plans that could eventually expand its AI infrastructure deployment to one gigawatt.
Naver's investment in Panthalassa therefore does not replace its conventional data-centre strategy. Instead, it gives the company exposure to a different infrastructure model that could become useful if AI computing demand continues to grow faster than traditional power and data-centre capacity.
There are also significant technical challenges. Offshore computing equipment must operate in harsh marine conditions, while maintenance, connectivity and the reliability of wave-generated power remain important questions for large-scale deployment.
Panthalassa's systems are designed to operate away from traditional grid connections, which could reduce dependence on land-based electricity infrastructure. But moving computing offshore also creates new engineering requirements, including remote operations and reliable communications between the ocean-based systems and users.
The startup's plans remain at an early stage compared with the established global data-centre industry. Its latest financing is intended to move the technology from prototypes towards initial deployments, rather than representing a mature commercial network.
The investment highlights a wider shift in the AI industry: the race to build better models is increasingly linked to the race to find enough electricity, cooling and computing infrastructure to run them.
For Naver, Panthalassa represents a bet on whether the ocean can become part of that infrastructure equation. The next test will be whether wave-powered offshore computing can move from demonstration projects to reliable commercial AI workloads.
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