The ENTROPY project aims to design and deploy an innovative IT ecosystem targeting at improving energy efficiency through consumers understanding, engagement and behavioural changes. The focus is given on the collection of energy-related information from heterogeneous data sources, the proper analysis of the available data and the provision of interactive services, applications and serious games to end users for stimulating their interest for energy efficient activities, recommending actions for adopting more energy efficient lifestyles and increasing their overall energy consumption awareness.