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Misskey vs Tumblr: catalog facts
Misskey	Tumblr
Free Free and open source under the AGPL. Hosting is separate.	Free Free to join and post.
Web, Self-hosted	Web
Custom reactions, quotes and a built-in file drive that Mastodon lacks Deep per-instance theming and customisation	Reblogging makes sharing and discovery easy Mix of text, image and video posts
Heavier to run than other fediverse servers Most documentation and community support is in Japanese	Centralised, proprietary platform owned by a single company
Self-hosted, Web application	Web application
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	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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