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Smithereen vs Open Source Social Network: catalog facts
Smithereen	Open Source Social Network
Free Free and released into the public domain under the Unlicense.	Freemium The core is free to download and self-host; some marketplace add-ons and managed setup are…
Self-hosted	Self-hosted
Friends, walls and groups instead of a microblog feed Federates with other ActivityPub servers	Profiles, groups, photo albums and messaging included out of the box Preconfigured VM image available alongside the zip installer
You need to run and maintain your own server Smaller community than Mastodon or other major fediverse servers	Some business add-ons are paid Uses its own license alongside CAL-1.0, so check the terms before redistributing
Self-hosted	Self-hosted
Open source	Open source
License: Unlicense	License: CAL-1.0
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 September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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