Mobility as a service (MaaS) is a unifying platform for diﬀerent transport services for a personalized journey with a single ticket. Blockchain is a distributed and immutable transaction ledger that provides trust between two actors without a need for a trusted third party. Blockchain is a clear candidate technology to solve some of the challenges presented in current MaaS platforms implementations. In this research we will explore how Blockchain technology can be integrated into existing MaaS platforms in order to mitigate some of the existing technological problems, speed up commercial transactions and maximize the revenues of diﬀerent stakeholders. The project aims at more accurate and timely predictability of user behavior and the related costs in MaaS. We expect, that the integration of the service providers to the MaaS platform infrastructure should prove signiﬁcantly easier with Blockchain than with the traditional middleware model and that the integration leads to more eﬃcient platforms enabling MaaS. Furthermore, we expect to solve some of the critical problems that prevent national and international coverage such as more ﬂexibility, privacy, security and a solution to the scalability problem. In the end, the results will be used in deﬁning clearer business plans for diﬀerent actors based on a decentralized solution and simpliﬁcation of the operations among the diﬀerent stakeholders.