Maritime Fusion

Based in the US, Maritime Fusion specializes in innovative energy solutions, developing a unique fusion reactor aimed at marine and off-grid applications, leveraging high-temperature superconducting magnets for enhanced energy efficiency. Maritime Fusion was founded in 2024 in San Francisco, US, focused on pioneering fusion reactor technology for maritime and off-grid applications. The company has completed one deal as of November 2025, securing USD 4. 5 mn in Seed funding led by Trucks Venture Capital, with additional participation from Alumni Ventures Group, Aera, and Y Combinator.

The founder's history is not publicly available. Maritime Fusion is focused on the development of a first-of-its-kind fusion reactor specifically designed for marine and off-grid applications. Their flagship product, the Yinsen reactor, leverages decades of tokamak research and utilizes high-temperature superconducting (HTS) magnets to enable breakeven fusion energy. This innovative reactor seeks to address the growing demand for decarbonized large vessels and energy solutions in remote areas, where traditional energy sources are insufficient.

The company targets commercial maritime operators and defense organizations, with a market presence in North America, Europe, and other regions pursuing decarbonization in marine transport and remote energy installations. While specific revenue figures are not disclosed, Maritime Fusion's business model focuses on B2B transactions, primarily targeting the commercial and defense sectors that require robust, zero-emission energy solutions. The company's offerings are expected to involve partnerships and contracts with maritime operators and government entities, centering on the sale of their Yinsen reactors and related technologies. The estimated cost for the first-of-a-kind Yinsen reactor is approximately USD 1.

1 bn, with a projected levelized cost of energy (LCOE) approaching USD 125/MWh for subsequent units, reflecting anticipated economies of scale through mass manufacturing. In November 2025, Maritime Fusion raised USD 4. 5 mn in Seed funding to advance its HTS cable program, build its low-power tokamak, and expand its lab and research partnerships. The funding will support the development of new products and facilitate the company's entry into additional markets, furthering its mission to provide innovative energy solutions.

The company aims to enhance its product offerings and extend its reach in North America and Europe, responding to the increasing demand for clean energy solutions in maritime and off-grid applications.