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Misskey vs Mastodon: catalog facts
Misskey	Mastodon
Free Free and open source under the AGPL. Hosting is separate.	Free Free and open source under the AGPL. Hosting is separate.
Web, Self-hosted	Android, Web, Self-hosted
Custom reactions, quotes and a built-in file drive that Mastodon lacks Deep per-instance theming and customisation	Chronological timelines with no engagement ranking Federated, so moving servers does not mean losing your network
Heavier to run than other fediverse servers Most documentation and community support is in Japanese	Your experience depends heavily on which server you join Running a server has real moderation and maintenance cost
Self-hosted, Web application	Self-hosted, Web application
Open source	Open source
License: AGPL-3.0	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 September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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