INSIEME (Integrated Network for data Space and Interoperable Energy Management in Europe) is an EU-funded project under the DIGITAL Europe Programme, launched on 15th April 2025. It aims to establish the Common European Energy Data Space (CEEDS) to enable secure, interoperable, and federated energy data exchange across Europe. By integrating existing national and regional energy data platforms into a federated ecosystem, INSIEME supports improved grid management, energy efficiency, and the integration of renewable energy sources. The project involves 54 consortium partners from across Europe, and runs until March 2028.