First steps with Decidim
Decidim is a digital platform
for citizen participation
Installing Decidim
You can install it yourself or find someone to help you with tech support.
The right tool for you
For big or small organisations, discover how Decidim can cater to your needs.
Decidim in your city
If your city is thinking of deploying participatory policies, find out how you can convince them to do it.
Is Decidim the right tool for you?
Decidim’s flexible features are designed to serve both small and large collectives, public and private organisations, with hundreds or thousands of potential users.
Explore all featuresBacked by technology, democracy and experience

City of Helsinki
We evaluated seven different kinds of participatory budgeting options to find the right platform to support...
Read the case study
European Commission
The digital platform was launched on 19 April 2021 and was open to contributions until 9 of May 2022. During this...
Read the case studyRead more case studies on our blog
Who’s behind the platform?
Metadecidim is the community that collaborates in the design of the platform and the development of the project. Together we design and create new features and report bugs for continuous improvement of the platform.
The Decidim Free Software Association is a democratic association for the governance of the Decidim community.
Decidimのおかげで、バルセロナでは市民と一緒に戦略的な都市計画を共同制作することができました。2016年には、Decidim Barcelonaによる参加型プロセスの形で、市のアクションプランを発足させました。現在、この計画には約7,000件の市民提案が含まれています。このプラットフォームを利用するメリットのひとつは、承認された提案の実施状況をいつでもモニターできることです。

デジタルプラットフォーム「Decide Mérida」は、メリダ市開発計画2018-2021の策定において、市民参加の仕組みをかつてないほどに開放する機会となりました。提案、コメント、提案、支援など、3,000人以上の市民が参加し、私たちの街にとって何がベストなのか、可能な限り高いコンセンサスを得ることができました。Decide Méridaプラットフォームは、メリダをますます参加しやすい社会にするための味方であり続けることは間違いありません。

このプロセスは、2019年10月に欧州委員会の科学・知識サービスである共同研究センターのコミュニケーション総局とeDemocracyユニットで始まりました。会議のニーズを分析し、どのツールがそれに適合するかを検討した結果、技術的な成熟度、幅広いコミュニティ、適応性を考慮して、オープンソースのツールDecidimを選択しました。

よくある質問
What do I need to install Decidim?
Installing Decidim is easy but you need some knowledge and technical requirements. See the documentation for installing Decidim.
What kind of members you accept into the Metadecidim community?
Anybody who has good faith and a correct attitude towards democratic collaboration.
Is there any tutorial to start setting it up?
You can check the latest version of our admin manual in the Documentation section.
I have ideas for new improvement features. I want to have a better understanding of the project. What can I do?
You can collaborate in multiple ways. One of them is through the Metadecidim community. If you want to propose new features, go here. If you have detected errors and want to notify them, go to this process. If you want to actively participate in the Metadecidim community, you can attend Community Meetings. Register as a participant of the community and participate with us. If your thing is the code, come to Github. If you are a researcher, you might be interested in coming to the LAB Metadecidim Seminars.