Decidim

The bet

Decidim began in 2016 as Barcelona's answer to the same demand that produced Decide Madrid: the 15-M movement's insistence that institutions give citizens real ways to shape decisions. Rather than build from scratch, Barcelona en Comú forked Madrid's Consul code and adapted it. But the bet quickly became bigger than any one city. Decidim would be a general-purpose, open-source framework for democratic participation — proposals, debates, participatory budgeting, assemblies — that any government or organization could run, and that would itself be governed democratically by the community that built it.

Peak

Decidim outgrew its origin. Released as a standalone Ruby on Rails framework in 2017 under a copyleft AGPL-3.0 license, it spread to more than 450 organizations across over 30 countries — Helsinki, Mexico City, Nancy, Québec, Puglia, universities, unions. Around it grew Metadecidim, an open community of citizens, developers, designers, and public officials who co-decide the software's direction, bound by a written democratic 'social contract.' It became the reference implementation for participatory democracy done as a commons rather than a product.

What worked

Nearly everything about the model is worth keeping. Because it is genuinely open-source, no city is captured by a vendor. Because it is governed by Metadecidim, the tool practices the participation it preaches — a rare and important thing. And it learned from its predecessor: Decidim added accountability and traceability features specifically to address the feedback gap that had discredited Decide Madrid, so a proposal can be followed through the system. As civic infrastructure, it is the field's clearest success.

What failed — the mechanism

Decidim fixed what software can fix and then met what software cannot. It can route a proposal to the right desk and record what happened to it, but it cannot make an elected body adopt it. So the platform's real-world impact turns almost entirely on the commitment of whoever deploys it: powerful where an administration means it, an elegant suggestion box where one does not. 'Decidim is installed here' can therefore mean everything or almost nothing. The binding of participation to consequence still lives in politics, outside the code — which is why even the best-built participation tool inherits the oldest problem in the field.

What Agora takes from it

Decidim is the proof that open, well-governed, traceable participation software is achievable — and the proof that it is not enough on its own. The missing piece is a dependable path from input to a response and a consequence, which cannot be left to the goodwill of each deployment. Agora treats that response loop as the core of the product rather than a feature bolted on, so participation is answered by design rather than by luck. Decidim's other lesson is quieter and just as important: a civic platform earns trust partly by how it is governed, not only by what it does.