Free, open-source participatory platforms like Decidim or Consul were designed by the 15M’ citizen activists in Spain. Initially implemented in Barcelona and Madrid, these platforms are spread in many countries. Castells has not examined the institutionalization of the 15M’s offspring, and thus we aim to contribute by studying the rollout of the Decidim platform in Catalan municipalities. We examine its disruptive potential along three democratic dimensions: transparency, participation and deliberation. Our study combines in-depth interviews and an online questionnaire administered to public officials in charge of the platform and analyses the levels of participation on the platform. The research shows elements of managerial continuity: the most valued goals are transparency, organisation of information and the collection of citizen proposals, rather than deliberation and transfer of sovereignty towards citizens. However, the platform forces administrations to consider individual citizens’ inputs, increases citizens’ proposals and initiatives, and brings in new participant publics. Furthermore, democratic innovation is being pushed ahead by a networkof activists and technological experts that continuously improve the platform and function as a counter-power (Castells, 2015, 2016).

像 Decidim 或 Consul 这样的免费开源参与平台是由西班牙的 1500 万公民活动家设计的。最初在巴塞罗那和马德里实施，这些平台分布在许多国家。Castells 尚未检查 15M 后代的制度化，因此我们旨在通过研究 Decidim 平台在加泰罗尼亚城市的推出来做出贡献。我们从三个民主维度考察其破坏性潜力：透明度、参与和审议。我们的研究结合了深度访谈和对负责平台的公职人员进行的在线问卷调查，并分析了平台的参与程度。研究显示了管理连续性的要素：最有价值的目标是透明度、信息组织和公民建议的收集，而不是审议和将主权移交给公民。然而，该平台迫使政府考虑个人公民的意见，增加公民的建议和倡议，并引入新的参与公众。此外，积极分子和技术专家网络正在推动民主创新，他们不断改进平台并发挥反作用力（Castells，2015，2016）。