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JARR vs Tiny Tiny RSS: catalog facts
JARR	Tiny Tiny RSS
Free Free and open source under the AGPL-3.0.	Free Free and open source under the GPL. Hosting is separate.
Web, Self-hosted	Web, Self-hosted
Three-column reading interface in the browser Folders for categories and a view of feeds with errors	Filtering and scoring rules that few other readers match API support means third-party mobile clients work against your own server
Documentation on the homepage is an older introduction post Small project with a small community	Official distribution is Docker-first and upstream is famously blunt about support Requires PHP and PostgreSQL or MySQL
Self-hosted	Self-hosted, Web application
Open source	Open source
License: AGPL-3.0	License: GPL-3.0
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 September 22, 2026

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