Smart Cities use information and communication technology to offer better and more cost-effective quality of life to residents, encompassing everything from infrastructures and energy, water, and phone networks to transport, via the management of administrations, educational and cultural facilities, and waste management. To be a part of this market, actors are diversifying and engaging in vertical integration to become systems suppliers. Who are the big players in Smart Cities in France? Which projects have made the most progress? Is there a place for public transport operators on this market? What added value can they provide?