Data is a promising game-changer for future mobility. Effective data sharing between cities, public transport operators and private mobility service providers has the potential to boost better mobility management while enhancing the competitiveness of private stakeholders. This article provides a description of the different barriers that mobility stakeholders, both public and private, must overcome in order to unlock the value that data can provide to improve the business models of mobility operators and support informed urban mobility planning. In addition, the proliferation of micromobility services reshaping urban mobility generates a need for policymakers to understand these new trends by requesting data of mobility operators while ensuring fair data-informed mobility policies. This article also goes into depth on such intangible aspects as trust, which plays a key role in unlocking value from sharing data. Why are operators reluctant to share their data? How can users’ privacy be protected and operators’ competitiveness preserved by anonymising data? The MDS and CDS-M initiatives propose ways to govern data sharing from shared service providers to cities. A consensus option is that all parties trust a third party that handles data. An analysis of pros and cons is provided, including real-world examples, highlighting the fact that there is no optimal option for all possible scenarios, because this depends on the level of risk and intervention that the stakeholders involved are willing to take. Data also plays a key role in enabling MaaS (Mobility as a Service), as increasing the availability of data is a precondition to achieving superior integration levels (from one to four): many cities already have access to mobility datasets from private mobility operators as a prerequisite for receiving a licence to operate in cities (Level 1). Level 2 uses available data to develop evidence-based decisions aimed at creating more effective mobility policies, but only a few cities have reached this stage through pilot projects. Finally, MaaS Levels 3 and 4 will add pricing strategies with the ability to influence mobility users’ behaviour and mobility management to promote societal goals through access to real-time data from various mobility services. The use of Software as a Service platforms such as the novel Rideal will play a key role in designing incentives programmes to nudge behavioural change towards more sustainable mobility.