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Bluesky vs Iris: catalog facts
Bluesky	Iris
Free Free to use; the flagship app is a hosted service built on the open AT Protocol.	Free The research shows no pricing for using the web client.
Android, iOS, Web	Web
Built on an open protocol rather than one closed platform Lets users migrate their identity between providers	Runs in the browser with nothing to install Relay list you can edit, with discovered relays
Most users rely on the official hosted service rather than running their own infrastructure Ecosystem of alternative apps and providers is still maturing	Content and reach depend on the relays you connect to Nostr has a smaller audience than mainstream networks
Web application, Downloadable app	Web application
Closed source	Closed source
License not stated	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 September 23, 2026

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