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Damus vs Iris: catalog facts
Damus	Iris
Freemium Free to use; the optional Purple membership is paid.	Free The research shows no pricing for using the web client.
macOS, Android, iOS	Web
No phone number or email needed to sign up Built on the open Nostr protocol	Runs in the browser with nothing to install Relay list you can edit, with discovered relays
You must keep your private key safe yourself Some extras require the paid Purple membership	Content and reach depend on the relays you connect to Nostr has a smaller audience than mainstream networks
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
No account 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 23, 2026

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