The global fuel cells for marine vessels market is expected to see substantial growth, reaching USD 234.6 million by 2029, driven by the demand for alternative propulsion systems and research in fuel cell technology. Private companies like Ballard Power Systems are at the forefront, developing sustainable solutions for both commercial and defense marine vessels to comply with environmental regulations. Despite challenges like vibration, noise, endurance, and fuel accessibility, fuel cells offer a promising alternative for reducing greenhouse gas emissions. Governments globally are investing heavily in R&D programs to mitigate high upfront costs and promote the adoption of fuel cells in marine operations. The integration of fuel cell propulsion systems into marine vessels addresses efficiency concerns and emissions reduction, paving the way for a sustainable marine industry. The market segmentations cover commercial, military, and other applications, various fuel cell technologies, and geographic regions.