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Inventaire vs BookLogr: catalog facts
Inventaire	BookLogr
Free Free to use and open source under the AGPL-3.0 licence.	Free Free and open source under the Apache 2.0 licence.
Web, Self-hosted	Web, Self-hosted
Book data from ISBNs and Wikidata Share a library with friends and communities	Book lookup by title or ISBN via OpenLibrary Export to CSV, JSON and HTML
Focused on books only Covers physical books rather than ebook files	Expect bugs and breaking changes during active development Tracks books rather than reading ebook files
Web application, Self-hosted	Self-hosted
Open source	Open source
License: AGPL-3.0	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it 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.