Captura is a climate technology company that has developed a Direct Ocean Capture (DOC) process to remove carbon dioxide from seawater, thereby amplifying the ocean's natural ability to absorb atmospheric carbon. The company's core technology is a high-performance bipolar membrane electrodialysis system that extracts dissolved CO2 from seawater without the use of additives or by-products, then returns the treated water to the ocean to draw down additional atmospheric carbon. Captura operates a 1,000 ton-per-year pilot plant in Hawaii and manufactures its electrodialysis platform from a production facility in Pasadena, California. Captura's mission is centered on harnessing the ocean as a scalable, natural resource for climate healing while prioritizing ocean health throughout its operations. The company was invented at Caltech and has received support from prominent backers including XPRIZE, Frontier, and the U.S. Department of Energy. In June 2026, Captura raised $12.5 million in the first close of its Series B financing round to expand its electrodialysis platform. Beyond carbon removal, Captura's electrodialysis technology serves a range of industrial sustainability markets, including direct lithium extraction, desalination, wastewater valorization, energy storage, and electrochemical carbon capture. The company has also secured a supplier deal to provide ocean-captured CO2 for an electro-sustainable aviation fuel (eSAF) plant in France, demonstrating the commercial versatility of its platform.