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Mastodon vs Hollo: catalog facts
Mastodon	Hollo
Free Free and open source under the AGPL. Hosting is separate.	Free Free to self-host from the GitHub repository.
Android, Web, Self-hosted	Self-hosted
Chronological timelines with no engagement ranking Federated, so moving servers does not mean losing your network	Federates with Mastodon and the wider fediverse Works with existing Mastodon client apps
Your experience depends heavily on which server you join Running a server has real moderation and maintenance cost	Single-user only You must run and maintain the server yourself
Self-hosted, Web application	Self-hosted
Open source	Closed source
License: AGPL-3.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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