The Urban Transitions Alliance (UTA) is designed to help industrial legacy cities to share knowledge, discover new solutions and better navigate their own urban transitions towards a sustainable future. It is coordinated by ICLEI – Local Governments for Sustainability and funded by the Stiftung Mercator. The Wuppertal Institute supported the Stiftung Mercator in conducting an evaluation of UTA implementation. The evaluation aimed at assessing the extent to which the UTA functioned effectively as a platform to support learning and collaboration of the industrial legacy cities in its network on sustainable transformation and providing recommendations for improvement.