Abstract: Following the growing world population and associated need for increased transportation, there is a growing interest in some aspects of transport such as sustainability, to reduce CO₂ emissions and reach climate objectives. Modern urban living is rapidly changing with new technological innovations, one of which is the possibility to integrate different electronic “on demand” services into one single medium. Public transport users need innovative, multi-applicative, multi-functional, safe and secure ticketing systems, easy to use. Concept of Mobility as a Service (MaaS) as an integration of various forms of transport services into a single mobility service accessible on demand is a new way of thinking about public transport. This paper focuses on mobility market transformation with main question how Mobility as a Service based on open source principles will impact the ecosystem.