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Sharkey vs Misskey: catalog facts
Sharkey	Misskey
Free Free to self-host.	Free Free and open source under the AGPL. Hosting is separate.
Web, Self-hosted	Web, Self-hosted
Tracks upstream Misskey while adding features Federates with Mastodon, Akkoma, Pixelfed and more	Custom reactions, quotes and a built-in file drive that Mastodon lacks Deep per-instance theming and customisation
Hosting an instance requires server administration Smaller project with a small maintainer team	Heavier to run than other fediverse servers Most documentation and community support is in Japanese
Self-hosted	Self-hosted, Web application
Open source	Open source
License not stated	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 23, 2026	Official website Full listing and sources Checked September 22, 2026

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