Inventaire review covering the open-source, Wikidata-federated book inventory app, its features, self-hosting, and alternatives like Goodreads.
Inventaire is a free, open-source application for cataloguing personal book collections and connecting readers so they can lend, borrow, sell or give away books within their own social network. The project began around 2015 under French developer Maxime Lathuiliere and was formalized in 2019 as a French nonprofit association so its founders could work on it as paid staff.
Unlike commercial book-tracking apps, Inventaire is a community-governed, grant-funded project (notably supported by NLnet Foundation grants) rather than a venture-backed company, and its codebase is fully open source under the AGPLv3 license, with anyone free to run their own self-hosted, federated instance.
Inventaire's core innovation is that its book data is not a proprietary database but a CC0-licensed, Wikidata-federated bibliographic graph, linking books, authors and editions to Wikipedia and national library catalogs rather than maintaining a walled-garden metadata set. Users add books by scanning ISBN barcodes or searching titles, then tag copies as available to lend, sell or give away.
The platform supports private groups and networks so users can see what people they know currently have listed, private messaging to arrange exchanges, and wishlists, all with multilingual coverage inherited from Wikidata. There is deliberately no built-in payment or shipping system, since Inventaire is built around local, trust-based exchanges rather than a commercial marketplace model.
Inventaire is entirely free to use on its flagship instance at inventaire.io, with no subscription tiers, transaction fees or premium features gated behind a paywall. The project is sustained through grants (including NLnet Foundation funding) and donations rather than user fees.
Because the software is open source under AGPLv3, organizations and communities can also self-host their own federated Inventaire instance at no licensing cost, taking on only their own infrastructure costs in exchange for full control over their book data.
Inventaire is used to catalog personal book collections and let your network know which books are available to lend, sell or give away.
Yes, Inventaire is entirely free to use, sustained through grants and donations rather than user fees.
Yes, the codebase is open source under the AGPLv3 license and available on Codeberg.
Inventaire reuses and contributes to Wikidata's open bibliographic graph rather than maintaining a proprietary book database.
Yes, anyone can deploy their own federated Inventaire instance instead of using the main inventaire.io site.
Common alternatives include Goodreads, LibraryThing, and other open-source library cataloguing tools.