An open-source digital democracy platform, Decidim empowers citizens to actively participate in shaping policies and urban development. Originally developed by Barcelona City Council in 2016, the platform facilitates proposal submission, debate, and voting on civic initiatives. Its core mission is to foster transparency, accountability, and collaborative decision-making processes within communities and organisations.
Now adopted by over 400 entities across 35+ countries, Decidim has gained traction as a globally recognised tool for digital democracy. Notable users include cities such as Helsinki and Mexico City, as well as the European Commission, demonstrating its scalability and adaptability across diverse contexts. The platform operates as a commons-based digital public good, governed by the Decidim Association, ensuring its continued accessibility and collaborative development. By offering a structured and accessible environment for online participation, Decidim strengthens citizen engagement and contributes to more inclusive and responsive governance in European smart cities and beyond. The technology promotes informed decision-making and helps bridge the gap between policymakers and the public, ultimately fostering stronger and more democratic communities.