Accompany cities in energy strategy (ACCENT) is an Innovation project developed within the Climate KIC, Europe’s largest public-private innovation partnership, working to address the challenge of climate change. ACCENT project started in 2014 with a proof of concept phase, intended to deepen the needs in key stakeholders with respect to energy planning. After having validated the feasibility and added value of its offer, ACCENT project have entered a demonstration phase in 2015. In order to support the energy transition of European cities, ACCENT will provide city stakeholders data and tools to map and diagnose existing energetic situation, and design energy strategies which maximize energy efficiency. ACCENT tool is being developed and tested in 4 pilot cities and will be available for every cities before the end of 2016.