Compare software

Known vs Ech0: catalog facts
Known	Ech0
Free Free and open source software.	Free Free and open source under the AGPL-3.0 licence.
Self-hosted	Self-hosted
IndieWeb support with replies and bookmarks between sites ActivityPub delivery to the Fediverse	Lightweight and quick to deploy Full ownership of your posts on your own domain
Needs PHP 8.3+, a database and a background worker for ActivityPub Install packages are unofficial; main code is under active development	Some documentation is only in Chinese Not a note-taking or team documentation tool
Self-hosted	Self-hosted
Open source	Open source
License: Apache-2.0	License: AGPL-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 October 2, 2026

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