IFPEN released a report commissioned by CMA CGM evaluating the performance of methanol and ammonia for maritime transport decarbonization. The Life Cycle Assessment focused on e-methanol, bio-methanol, e-ammonia, and blue ammonia. E-methanol showcased a 70% reduction in GHG emissions compared to VLSFO in container unit transportation, contingent on biogenic CO2 availability. Bio-methanol exhibited high potential for decarbonization, achieving an 80% lower WtW emissions than VLSFO with sustainable biomass feedstocks. E-ammonia, though showing a 50% reduction in emissions, requires technological advancements for efficiency and emissions reduction. Blue ammonia's emissions levels currently hinder its decarbonization potential, necessitating improvements in methane emissions control and carbon capture. The study underscores the impact of production regions and transport distances on emissions, highlighting the role of renewable energy sources in reducing WtW emissions. Strategic decisions in the shipping industry should consider not only regulatory compliance but also full life-cycle emissions and fuel feasibility.