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Inventaire vs Openshelf: catalog facts
Inventaire	Openshelf
Free Free to use and open source under the AGPL-3.0 licence.	Free Free and open source under the GPL-3.0 licence.
Web, Self-hosted	Android
Book data from ISBNs and Wikidata Share a library with friends and communities	No account and data stays on the device Flexible organisation by category, collection and imprint
Focused on books only Covers physical books rather than ebook files	Android is the supported platform No cloud sync between devices
Web application, Self-hosted	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0-only
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.