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Hubzilla vs Smithereen: catalog facts
Hubzilla	Smithereen
Free Free open-source software you host yourself.	Free Free and released into the public domain under the Unlicense.
Web, Self-hosted	Self-hosted
Nomadic identity with clones and backups Built-in files, photos, calendar, webpages and wikis	Friends, walls and groups instead of a microblog feed Federates with other ActivityPub servers
Many features make it more complex than simple microblogging servers Requires running your own web server	You need to run and maintain your own server Smaller community than Mastodon or other major fediverse servers
Self-hosted	Self-hosted
Open source	Open source
License not stated	License: Unlicense
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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