1001 Smart Cities
🇪🇸 Barcelona

Decidim Participation Platform

🤖 AI-generated summary of the sources below · 🔎 Last verified · ◆ 9 sourced claims, none individually verified yet

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

Barcelona City Council put its own participation platform online in February 2016; the free-software project that grew out of it, Decidim, counted 400 instances in more than 20 countries by 2022, used by Mexico City, Helsinki, New York and France's National Assembly. Barcelona itself still runs its 2024-27 participatory budget on it, with 1,700+ resident proposals submitted for €30 million in district spending.

Live 📅 since 2016
Outcome🎯 Succeeded
Evidence🏛️ Official
what does this mean?The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →
Run byAjuntament de Barcelona (Barcelona City Council)
Scale🏙️ City-wide

📊 Impact

Barcelona City Council reports on its own decidim.barcelona platform that the participatory budget projects approved by residents were 25 % executed overall in April 2026 ("el grau d'execució global del conjunt de projectes aprovats ja se situa en el 25%"); its live monitoring page has since put the figure at 40.5 % across 76 actions. Self-reported by the city throughout, with no independent check.

🏛️ GovernanceCitizen participation

Sources

↗ Decidim (project)Published 1 February 2022Official project blog: 400 instances, 20+ countries, named institutional users.
↗ Ajuntament de Barcelona (authority)City's live decidim.barcelona instance running the 2024-27 participatory budget process.
↗ Universitat Oberta de Catalunya (research)Published 20 June 2019Co-developing research university on Decidim's 2019 EU Sharing & Reuse Award (second place, most innovative open-source software).
↗ Ajuntament de Barcelona — participatory budget monitoringThe city's live monitoring component for the 2024-27 participatory budget: a global execution level, a percentage per district and 76 individual actions, downloadable as CSV. Read on 22 August 2026 showing "Estat d'execució global 40,5 %"; the page is continuously updated and carries no publication date.
↗ Ajuntament de Barcelona — execution reaches 25%Published 4 April 2026The official post the 25 % figure comes from, with its date shown to the reader directly under the headline.
Show 1 more sourcesShow fewer
↗ Ajuntament de Barcelona — proposals submitted 2024-27The component that carries the submitted-proposal count itself: 1,727 proposals. The process landing page shows a larger, space-wide 2,454, which counts the 727 prioritised proposals a second time.

📅 How old is the evidence?

Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. Documented span: since 2016. 3 of 6 sources carry a publication date, from 20 June 2019 to 4 April 2026.

When the sources were published

  1. Universitat Oberta de Catalunya · researchUniversitat Oberta de Catalunya (research)
  2. Decidim Association · ngoDecidim (project)
  3. Ajuntament de Barcelona · city governmentAjuntament de Barcelona — execution reaches 25%

Every source, with links ↑

What happened to this record

  1. Sources last read
  2. Entered the record

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 9 claims with their sources · the forensic record

Evidence Passport · public beta 9 addressable claims, 6 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 9

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-4b99f3fc3e5422ea quantitative
Barcelona City Council put its own participation platform online in February 2016
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The Decidim project's own fifth-anniversary post states: "On 1 February 2017 decidim.org was born, the free and open source platform for participatory democracy, conceived and promoted by the Barcelona City Council." and "Exactly one year earlier, the first instance of decidim's software, Decidim.Barcelona, was born, which to this day is the largest". The UOC news item, from the university that co-develops the project, confirms the attribution: decidim.barcelona "is the digital platform for participatory democracy of the City Council of Barcelona".
Caveat
The source attaches February 2016 to Barcelona's own installation, not to the open-source project. Decidim dates decidim.org, the software project, to 1 February 2017 — a year later.

Sources carrying this claim

  1. Decidim (project)
  2. Universitat Oberta de Catalunya (research)
Claim 2 clm-939e9f95534b10d6 quantitative
counted 400 instances in more than 20 countries by 2022
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The project's post of 1 February 2022 says: "Five years have passed since its birth and there are already 400 instances worldwide, both in pre-production and in production. It has been implemented in more than 20 countries".
Caveat
The source counts 400 instances, not more than 400, and explicitly includes installations still in pre-production, so not all of them were in active use. The count describes the Decidim software worldwide, not Barcelona's own platform.

Sources carrying this claim

  1. Decidim (project)
Claim 3 clm-caafa2d95e93b4a5 descriptive
used by Mexico City, Helsinki, New York and France's National Assembly
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The same post names the adopters: "It has been implemented in more than 20 countries, by local governments and very diverse institutions such as the governments of Mexico City, Helsinki, New York, Kakogawa (Japan), the European Commission and the National Assembly of France, to name but a few."
Caveat
The list comes from the project's own anniversary post and records that these institutions run the software, not how much they use it or with what result.

Sources carrying this claim

  1. Decidim (project)
Claim 4 clm-4a133ba3af43e410 quantitative
Barcelona itself still runs its 2024-27 participatory budget on it
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The council's own instance hosts the live process "Pressupostos participatius 2024 - 2027", whose current phase is given as "Seguiment de l'execució dels projectes d'inversió" (monitoring the execution of the investment projects), running since 1 October 2025.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Ajuntament de Barcelona (authority)
Claim 5 clm-422dd349e53d0a1b quantitative
with 1,700+ resident proposals submitted
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The proposals component of the 2024-27 process states the count directly: 1,727 proposals.
Caveat
The process landing page shows 2,454 instead; that larger number counts the 727 prioritised proposals a second time, in a separate component.

Sources carrying this claim

  1. Ajuntament de Barcelona — proposals submitted 2024-27
Claim 6 clm-14cd5d5688b8e2c8 quantitative
for €30 million in district spending
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The process page states the amount: "30 milions d'euros per dur a terme projectes d'inversió proposats i triats directament per les veïnes i veïns de la ciutat" — 30 million euros for investment projects proposed and chosen directly by the city's residents, allocated across the ten districts.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Ajuntament de Barcelona (authority)
Claim 7 clm-fe5ef072255145fb quantitative
the participatory budget projects approved by residents were 25 % executed overall in April 2026
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
A post on the council's platform, dated 4 April 2026 and headed "Post oficial", reads: "Actualment, el grau d'execució global del conjunt de projectes aprovats ja se situa en el 25%" — the overall execution level of the approved projects currently stands at 25 %. The post places this in the edition that began in October 2024.
Caveat
This is a snapshot from April 2026. The monitoring section of the same platform now reports a global execution level of 40.5 %, so the figure belongs with a date beside it.

Sources carrying this claim

  1. Ajuntament de Barcelona (authority)
Claim 8 clm-4ec136a48ef65640 descriptive
Self-reported by the city throughout
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The figure is published by the council itself on its own participation platform; the item carries the platform's "Post oficial" marker and no outside body is cited for it.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Ajuntament de Barcelona (authority)
Claim 9 clm-fcf90b8174b5f9ca descriptive
with no independent check.
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The post gives the single overall percentage and nothing else: it describes the move from decision to execution and the value of publishing progress, but names no number of completed projects.
Caveat
The platform's monitoring section does publish an execution percentage for each of the ten districts and lists 76 individual actions. What is missing is a tally of how many of them are complete.

Sources carrying this claim

  1. Ajuntament de Barcelona (authority)
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-23-evidence-baseline effective 2026-07-18 · created 2026-08-23

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:ad5d2a018eb50c2f259ff2b0621077624c7cf10c09884eacc8222f7794e510a2
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
9
of 9 claims mapped
6
source dossiers
3
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Ajuntament de Barcelona (Barcelona City Council)
Actor types
city-government
Funding model
public
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

6 source dossiers

Decidim (project) decidim.org · 3 linked claims

Open original source ↗

Stable source ID
src-27b7dec90ffc2556
Publisher
Name not classified · decidim.org
Type / language
web-page · language not classified
Published
2022-02-01
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-18
Dossier created
2026-08-23
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official project blog: 400 instances, 20+ countries, named institutional users.

Descriptive only — not page/paragraph exact
Claims linked
Ajuntament de Barcelona (authority) decidim.barcelona · 5 linked claims

Open original source ↗

Stable source ID
src-c72fb6695a4194b5
Publisher
Name not classified · decidim.barcelona
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-18
Dossier created
2026-08-23
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

City's live decidim.barcelona instance running the 2024-27 participatory budget process.

Descriptive only — not page/paragraph exact
Claims linked
Universitat Oberta de Catalunya (research) uoc.edu · 1 linked claim

Open original source ↗

Stable source ID
src-5a23df5925ed5c85
Publisher
Name not classified · uoc.edu
Type / language
web-page · language not classified
Published
2019-06-20
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-18
Dossier created
2026-08-23
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Co-developing research university on Decidim's 2019 EU Sharing & Reuse Award (second place, most innovative open-source software).

Descriptive only — not page/paragraph exact
Claims linked
Ajuntament de Barcelona — participatory budget monitoring decidim.barcelona · background

Open original source ↗

Stable source ID
src-4a81ccd6dfe4aee8
Publisher
Name not classified · decidim.barcelona
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-18
Dossier created
2026-08-23
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The city's live monitoring component for the 2024-27 participatory budget: a global execution level, a percentage per district and 76 individual actions, downloadable as CSV. Read on 22 August 2026 showing "Estat d'execució global 40,5 %"; the page is continuously updated and carries no publication date.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Ajuntament de Barcelona — execution reaches 25% decidim.barcelona · background

Open original source ↗

Stable source ID
src-e57decf6ea0e7060
Publisher
Name not classified · decidim.barcelona
Type / language
web-page · language not classified
Published
2026-04-04
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-18
Dossier created
2026-08-23
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The official post the 25 % figure comes from, with its date shown to the reader directly under the headline.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Ajuntament de Barcelona — proposals submitted 2024-27 decidim.barcelona · 1 linked claim

Open original source ↗

Stable source ID
src-73b848d63c8ee586
Publisher
Name not classified · decidim.barcelona
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-18
Dossier created
2026-08-23
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The component that carries the submitted-proposal count itself: 1,727 proposals. The process landing page shows a larger, space-wide 2,454, which counts the 727 prioritised proposals a second time.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this passport
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.

Continue exploring

Compare this project

🇫🇷 Budget Participatif — Citywide Participatory Budgeting · Paris Both hand residents real budgeting power: Decidim (2016) is Barcelona's own platform, Paris runs a citywide vote since 2014. 🇨🇭 Smart City Zürich Strategy · Zürich Two governance-tech paths: Barcelona open-sourced its own participation platform, Decidim (2016); Zurich built a broader digital strategy. 🇪🇸 VinclesBCN — Tablets Against Unwanted Loneliness · Barcelona Two Barcelona digital services from the same 2016 wave: Decidim gives residents a governance voice, VinclesBCN an elder social one.

The participation platform, and what happened after the launch

Four cities put proposals and budgets online, three of them on software another city wrote. The interesting part is not the launch — it is what the same city's own data says a few years later.

ProjectSinceStatusOutcomeEvidenceRun byCostWhere it stands now
Budget Participatif — Citywide Participatory BudgetingParis, 🇫🇷 2014 Live Succeeded Official City government not public A decade in and still running at scale, with thousands of projects delivered — and no edition in an election year.
Decidim Participation PlatformBarcelona, 🇪🇸 2016 Live Succeeded Official City government not public The software outgrew the city that wrote it, running in hundreds of institutions while Barcelona still uses it at home.
Decide MadridMadrid, 🇪🇸 2015 Live Scaled back Peer-reviewed City government not public The engine was reused worldwide; the platform that produced it was pared back by the administration that inherited it.
BA Elige: Buenos Aires's Online Participatory BudgetBuenos Aires, 🇦🇷 2017 Completed Scaled back Peer-reviewed City government not public Three editions on Madrid's software, and the city's own dataset records the traffic falling away between them.

Explore the wider context

🌍 Hardware Stops, Data Doesn't🗳️ Citizen participation guide🏙️ Barcelona city profile🏛️ Governance projects📖 Civic participation platform📖 Participatory budgeting📖 Digital identity
📎 Cite this project

1001 Smart Cities (2026). “Decidim Participation Platform” — Barcelona, Spain. The Smart City Atlas. https://1001smartcities.org/projects/barcelona-decidim/ (last verified 2026-07-18). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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