<p>Liquefied natural gas (LNG) regasification terminals dissipate large amount of cryogenic energy during regasification, while simultaneously requiring effective boil-off gas (BOG) management. LNG cold energy recovery along with effective BOG management can significantly enhance the economics of LNG value chain. Thus, it is important to determine the most economical process for recovering the available cold energy. To address this, a comparative technoeconomic analysis of two competing waste cold energy valorization processes i.e., power generation (LNG_cold-PG) and hydrogen liquefaction (LNG_cold-HL), integrated with BOG management is presented in this study. A simulation-based optimization framework is developed to maximize the net present value (NPV) of both these processes. Impact of different terminal conditions on technoeconomics of proposed configurations are also investigated. The results indicate that both LNG cold energy recovery pathways are economically viable under diverse regasification terminal conditions. Comparative assessment reveals that the LNG_cold-HL configuration offers greater economic benefits owing to its enhanced recovery and utilization of LNG cold energy. These findings demonstrate that the proposed integrated hydrogen liquefaction process emerges as an effective pathway for waste cold energy valorization, thereby enhancing the technoeconomics of LNG regasification terminals. The proposed framework can further aid in decision-making for policymakers seeking to valorize the available LNG cold energy via sustainable integrated processes.</p> Graphical Abstract <p></p>