The Finnish Meteorological Institute (FMI) has embraced open data and open-source software, transitioning from a closed ecosystem to one that supports collaboration and innovation in weather services. Since 2013, FMI has opened its data and is actively developing open-source software to enhance weather forecasting and emergency responses, aiming to support both national and international meteorological services. Various software tools like SmartMet are being utilized for data sharing, visualization, and operational activities, significantly improving forecasting capabilities across different regions.