OPENTUNITY’s mission is to create a flexibility ecosystem reducing interoperability barriers and favouring the use of standards in order to decarbonize EU grids and put the end-user in the spotlight. Grid operators, prosumers, market actors etc. will be supported by OPENTUNITY via innovative methodologies backed by advanced, interoperable software modules, in order to provide them with new features and services related to: 1) Technologies to boost flexibility in prosumer’s environment; 2) Technologies for grid operators to better manage grid operations). OPENTUNITY will also evolve, adapt and integrate a Federated Data Space infrastructure in which actors from different fields will share services and find synergies among them in order to create a reliable energy system in which different verticals (electromobility, gas, OEM etc.) will be able to seamlessly collaborate with each other. OPENTUNITY will be demonstrated in 4 different countries (Greece, Slovenia, Spain and Switzerland), benefitting 26.852 citizens and reducing 91,22 MtCO2eq GHG emissions and energy poverty by 30% by 2032.