Hopium SA (ALHPI.PA), a French cleantech company founded in 2019 and headquartered at 22 rue des Frères Lumière in Saint-Bonnet-de-Mure, near Paris, France, develops and manufactures high-performance hydrogen fuel cell systems and hydrogen-powered vehicles for heavy mobility and industrial applications; its core offerings include compact 100 kW and 200 kW fuel cell modules designed for superior efficiency, modularity, reliability, and plug-and-play integration into electric powertrains for heavy goods vehicles, buses, coaches, maritime vessels, and aeronautics; previously focused on the high-end hydrogen sedan Hopium Machina with spare parts, accessories, repair, and maintenance services, the company has shifted to fuel cell technology solutions emphasizing decarbonized energy across land and marine sectors. Hopium operates primarily in Europe with technological advancements tested in France and partnerships extending internationally, targeting premium automotive manufacturers, heavy transport operators, and industrial clients in clean energy transition markets. In 2025, Hopium formed a 50/50 joint venture named Hynesis with Pegase System to supply stationary hydrogen fuel cell systems for land-based backup power in hospitals, data centers, critical infrastructure, and onboard electricity/hot water production for large vessels over 150 meters; the company continues improving its 200 kW system, achieving 212 kW power output and advancements in fuel cell technology via ongoing R&D and bench testing for marine versions; recent financial updates include improved 2024 annual results reflecting a new strategic phase, alongside regulatory approvals for a modified recovery plan with 12.5 million euros in new funding support.