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. Barcelona en Comú didn't build from scratch. It forked Madrid's Consul code and adapted it.
The bet soon grew bigger than any one city. Decidim would be a general-purpose, open-source framework for democratic participation, covering proposals, debates, participatory budgeting and assemblies, that any government or organization could run. And the software itself would be governed democratically by the community that built it.
Peak
Decidim was released as a standalone Ruby on Rails framework in 2017, under a copyleft AGPL-3.0 license. It spread to more than 450 organizations in 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 decide together where the software goes, bound by a written democratic "social contract." Decidim became the reference implementation for participatory democracy run as a commons rather than a product.
What worked
Because Decidim is open source, no city is captured by a vendor. Because Metadecidim governs it, the tool practices the participation it preaches, which is rare and matters. 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 can't. It can route a proposal to the right desk and record what happened to it. It can't make an elected body adopt it.
So the platform's impact in the world turns almost entirely on the commitment of whoever deploys it. Where an administration means it, Decidim is powerful. Where one doesn't, it is an elegant suggestion box. "Decidim is installed here" can mean everything or almost nothing.
The binding of participation to consequence still lives in politics, outside the code. That's why even the best-built participation tool inherits the oldest problem in the field.
What Agora takes from it
Decidim proves that open, well-governed, traceable participation software can be built, and it shows that the software alone isn't enough. The missing piece is a dependable path from input to a response and a consequence, and that can't be left to the goodwill of each deployment. Agora is designed around the response loop as the center of the product, though it cannot make an official answer.
The quieter lesson matters just as much. A civic platform earns trust partly by how it is governed, as well as by what it does.
Common questions
- What was Decidim?
- The open-source participation platform that outgrew the city that built it and is governed as a democratic commons, yet still meets the wall every such tool meets: it can gather a proposal but can't make a government act.
- Is Decidim still running?
- Decidim is recorded here as survived / thriving. We file it under the pattern we call The advisory ceiling, which describes how it endured and what it gave up to do so.
- When did Decidim operate?
- 2016–present; still actively developed and expanding.
- Better ReykjavíkIceland's post-crash participation platform, which wired citizen ideas into monthly council decisions and showed how much that wiring depends on a government that keeps choosing to listen.
- Decide MadridThe most celebrated citizen-proposal platform of its generation: hundreds of thousands of people took part, almost no proposal cleared the bar, and a change of government showed how little of it they owned.
- MyGovIndia's vast government "citizen engagement" portal, where tens of millions submit ideas into a channel no ministry is required to answer, so the conversation stays one-way.