However, with the advent of the low carbon future, green hydrogen is turning out to be one technology that is likely to play an important role in the way the world thinks about decarbonizing the energy, industrial, and transportation sectors. Of the different methods used for the production of green hydrogen, the one that is currently the most developed is the Alkaline Electrolyzer (AEL) technology, followed by the Proton Exchange Membrane Electrolyzer (PEMEL) technology. The current work provides the comparison between AEL & PEMEL on the basis of the latest information available from literature, technology, and industrial experiences. The comparison highlights the importance of efficiency, response time, quality of hydrogen, capital cost, operational cost, and flexibility with intermittent renewables, among others. The outcomes reveal that the AEL process is more favorable in terms of capital cost, longer stack life, and suitable for constant, large-scale hydrogen production with poor response to fluctuating electric input, while the PEMEL process is more favorable with fast response time, high current density, and high purity hydrogen production, with high production cost, the involvement of scarce materials, and shorter stack life, among others. In sum, AEL is more applicable in cost-sensitive, continuously run processes, while the flexibility or availability of renewables renders the PEMEL system more appropriate, which is highly relevant for maximized blue hydrogen application strategies.