The International Telecommunication Union (ITU), the United Nations (UN) specialized agency for information and communication technologies (ICTs) and an international standard developing organization, has developed a set of International Standards (ITU-T Recommendations) on key performance indicators (KPIs) for smart sustainable cities (SSC) to assist cities in becoming smarter and more sustainable and provide cities with a tool for selfassessment. In 2018, Moscow initiated a partnership with ITU to implement the United for Smart Sustainable Cities (U4SSC) KPIs on smart sustainable cities. These KPIs are based on Recommendation ITU-T Y.4903/L.1603 on “Key performance indicators for smart sustainable cities to assess the achievement of sustainable development goals”. The KPIs are categorized into three key dimensions: Economy, Environment, and Society and Culture. These KPIs are specifically designed to assess compliance with existing international city KPIs, to assist in measuring Moscow’s progress towards its Smart Moscow 2030 strategy and to help cities achieve the UN Sustainable Development Goals (SDGs). This case study documents the key findings arising from the first year of the close working relationship between Moscow and ITU. It also highlights the activities carried out by different entities to support Moscow’s various Smart City initiatives.