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Tumblr vs Threads: catalog facts
Tumblr	Threads
Free Free to join and post.	Free Free to use.
Web	Android, iOS, Web
Reblogging makes sharing and discovery easy Mix of text, image and video posts	Large mainstream audience Optional fediverse sharing over ActivityPub
Centralised, proprietary platform owned by a single company	Centrally owned and operated by Meta Fediverse support is optional and partial
Web application	Downloadable app, Web application, Hosted service
Closed source	Closed source
License not stated	License: Proprietary
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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