The transport system with the private car as the main mode of transport is unsustainable. Mobility-as-a-Service (MaaS) is a system that can improve the efficiency and sustainability of the transport system. MaaS in developing countries needs to be adjusted from the MaaS operations in developed countries for it to be successful.The objective of this research is to evaluate the potential userbase of different MaaS configurations in a developing country. This is achieved by first characterizing the characteristics of a potential global MaaS user from literature. The typical global MaaS user can be described as a young, educated and employed with a high income, who values reliability and quality service in the mode of transport. The potential userbase of MaaS is evaluated based on two perspectives, the perspective of the population and the perspective of the travel mode. Secondary data sources such as the National Household Travel Survey (NHTS) and the Community Survey (CS) was used to evaluate the potential userbase of different MaaS configurations in Gauteng. The penetration rate of MaaS was determined to be between 4% - 5.36% of the general population, depending on which perspective was used. The results also showed that the penetration rate of social night trips was the highest, while workers contributed the majority of the trips and potential userbase. This research can assist potential operators, public entities and researchers with for marketing, policies, knowledge of transport in developing countries and analyzing the potential demand for MaaS in other countries