Three licenses, one open project.

You may

• Clone the repository, study the code, audit it freely.
• Modify it for your own needs (local government, non-profit, research).
• Redeploy it for your territory (multi-city, multi-region, national scale).
• Use it commercially (training, consulting, custom integration).

You must

• Preserve copyright notices and the license in any redistribution.
• If you run a modified version on a publicly accessible server (website, SaaS), publish your modified version under AGPL-3.0 as well.
• Allow users of your modified version to access your source code.

If your organisation wishes to integrate our code into a proprietary product without publishing its modifications (e.g. a consulting firm integrating our pipeline into a software suite sold to its clients), a commercial license alternative to AGPL can be negotiated. Contact us to discuss terms.

You may

• Download files freely for any purpose, including commercial.
• Republish, modify, and cross with other datasets.
• Embed them in paid products (reports, studies, dashboards).

You must

• Attribute each source dataset in the form its producer requires. For the City of Paris: "Dataset name, Ville de Paris, sous licence ODbL".
• Share-alike (ODbL) — if you redistribute a database derived from our Paris or Recife exports, publicly or as a service, it must itself be under ODbL. This does not apply to exports built solely from French State data (Etalab Open Licence 2.0) or from DataSF (PDDL).
• Credit Qipu as the producer of the derived database: "Qipu · derived database, licensed ODbL".
• Keep the source and source_url fields present in our JSON files — they trace the origin row by row.
• Not imply that Qipu endorses your reuse.

Licence by source

You may

• Quote a paragraph or an entire article in another medium.
• Translate an article and publish the translation.
• Reuse an analysis in a book, a course, a report (including commercial ones).

You must

• Cite Qipu (or the named author when indicated) with a link to the original article.
• Indicate whether you have modified the text (translation, summary, edit).

Some short summaries published on this site (grant-purpose plain-language rewrites, automatic translations) are generated by language models (Gemini, Claude). They are released under CC BY 4.0 like other editorial content, but their AI provenance must be disclosed if you republish them, in line with Paris Open Data editorial guidance and the European AI Act of August 2024 on transparent labelling of synthetic content.

If you are a journalist, researcher, student, or just curious, here is the recommended citation format for your articles, theses and reports:

Based on qipu.org, a derived database licensed ODbL, built from Paris Open Data (Ville de Paris, sous licence ODbL), Etalab and INSEE (Etalab Open Licence 2.0). Full methodology: qipu.org/methode. Accessed [date].