CO3, Digital Disruptive Technologies to Co-create, Co-produce and Co-manage Open Public Services along with Citizens, aims at assessing the benefits and risks of disruptive technologies, namely: blockchain, augmented reality, geolocated social network, liquid democracy tools and gamification, in the co-creation, co-production and co-management of public services with citizens as PAs partners. Augmented Reality becomes a single shared layer on the urban paysage and part of citizen’s public life, AR enables manipulation of financial objects built on blockchains, information sharing on a map, online deliberations and so constitutes an infrastructure for service co-production by citizens. CO3 pilots the technologies’ ecosystem of in three sites: Paris, Turin and Atherns. It evaluates the outcomes of the new interaction model between PA and citizens under a set of metrics in three dimensions: social and cultural: citizen engagement, change in relationship with public servants. economic: value of services produced, effects on workplaces, consumptions and economic sustainability legal: legal implications for PA including privacy and data protection. CO3 will devise a business plan ensuring long term sustainability for the PAs on the basis of the metrics applied on the pilots’ data. Impacts Enable Public authorities to develop pathways for the introduction of disruptive technologies while addressing societal challenges raised by such technologies. Enhance knowledge on digital democracy based on a thorough understanding of users’ needs and develop new ways of providing public services, of ensuring public governance and of boosting public engagement with the help of disruptive technologies. Contribute to developing new practices, to optimize work processes and to integrating evidence-based decision-making processes in public services and in services such as health, education, social welfare and mobility.