Sustainability Assessment is an essential process that guides the decision-makers to the most sustainable option. In the case of the Philippine transportation sector, one of the rising transportation systems is the different ride-hailing services. The main objective of this study is to evaluate the overall sustainability of the taxi service operation in Manila and propose improvements for the system’s development. This assessment is performed using a modified Fuzzy Evaluation for Life Cycle Integrated Sustainability Assessment (FELICITA). Sustainability indicators are identified as the basis for a sustainable transport system. The data gathered is prepared as inputs to undergo the fuzzy inference system. Based on the threshold values from existing literature/standards, MC taxi, RH taxi, and traditional taxi are not sustainable. The main weakness of the MC taxi service lies in the social aspect, while the main weakness of the RH and traditional taxi is in the economic aspect.