GREENGAGE aims to promote innovative governance process and help public authorities in shaping their climate mitigation and adaptation policies. To achieve this aim, the GREENGAGE project leverages citizens' participation and equips them with innovative digital solutions that will transform citizen's engagement and cities' effectiveness in delivering the European Green Deal objectives for carbon neutral cities. GREENGAGE is a 3-year long pan-European Innovation Action funded under the Horizon Europe Framework Programme. Consortium, led by Austrian Institute of Technology, consists of 17 research and industry partners from the EU and the UK.