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LinkAce vs Briefkasten: catalog facts
LinkAce	Briefkasten
Free Free and open source under the GPL-3.0 license.	Free Free and open source under the MIT licence.
Web, Self-hosted	Web, Self-hosted
Automatic archiving via the Internet Archive Regular dead-link monitoring with notifications	Self-hostable with Docker files included Also offered as a hosted instance
Archived copies depend on the Internet Archive rather than local storage Not meant to replace everyday browser bookmarks	Setup needs a database and an OAuth provider configured No tagged releases
Self-hosted	Self-hosted, Hosted service
Open source	Open source
License: GPL-3.0	License: MIT
Not stated if an account is needed	Account 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.