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

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