RT Journal Article T1 Smart cities and open innovation: what is known, how it is known and future agenda A1 Lima Rua, Orlando A1 Arias Oliva, Mario A1 Shu, Ziwei A1 Souto-Romero, Mar AB The relationship between smart cities and open innovation has attracted growing interest from the scientific community. However, there is still a scarcity of empirical studies on the subject. This study presents a Systematic Literature Review (SLR) supported by Bibliometrix, an R-based tool for science mapping. Based on 61 documents (56 articles and 5 reviews), this study traces the development of the theme by identifying the most relevant journals, authors, citations, keywords, and emerging trends. The findings show that the motor themes are smart city, open innovation, co-creation, and e-government, and that the main trends in evolution are Internet of Things (2017), smart cities (2019), and open innovation (2019). This study contributes to the theoretical understanding of the intersection between smart cities and open innovation by mapping the intellectual structure, key contributors, and thematic evolution of the field. For practitioners, policymakers, and urban planners, the findings provide a strategic map to support evidence-based decisions on where to source cutting-edge research, build collaborations, and benchmark innovative practices. PB Springer YR 2026 FD 2026-01-28 LK https://hdl.handle.net/20.500.14352/135056 UL https://hdl.handle.net/20.500.14352/135056 LA eng NO Rua, O.L., Arias-Oliva, M., Shu, Z. et al. Smart cities and open innovation: what is known, how it is known and future agenda. Discov Sustain 7, 293 (2026). https://doi.org/10.1007/s43621-025-02470-5 NO Universitat Rovira i Virgili NO Universitat de Barcelona DS Docta Complutense RD 28 abr 2026