Smart City Expo World Congress is held at Fira Barcelona Gran Via and focuses on urban innovation, with city leaders, technology companies, startups and researchers. The 2025 edition drew more than 27,000 attendees from 138 countries, with 592 speakers and 1,190 exhibitors. The 2026 edition runs alongside Tomorrow.Mobility, Tomorrow.Building, Tomorrow.Blue Economy and the Barcelona Cybersecurity World Congress. Topics include responsible AI, sustainable mobility, energy efficiency, digital equity and open governance.