This quantitative study examined the future sustainability of taxicabs in Tanzania with the emergence of boda boda (motorcycles and Bajajs) in supporting tourism sector in Tanzania. Specifically the study aimed at establishing whether service delivery and price negotiation have effect on taxicabs sustainability. A total of 130 registered taxicabs in Mbeya Urban were involved in this study, from ... [Show full abstract] which 97 taxicab owners were randomly selected to form the sample. The study was interested to understand the effect of introduction of motorcycles on taxicabs sustainability as the use of motorcycle is used for tourists' transportation. Chi-square and Pearson correlation were used to measure the relationship between variables leading to sustainability. Findings suggest that, taxicabs business in this area is experiencing stiff challenges to compete with motorcycles in the evolving market. The results show further that there is positive relationship between the services delivered and sustainability of taxicabs business. However, price negotiation showed negative relationship with taxicabs sustainability. It is recommended that business owners should be in a position to put forward pricing strategies in relation to demand for service; take precautions to monitor the market and its competition; put in place strategies to compete in the marketplace for the sustainability of taxicabs business.