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0xchat vs Keet: catalog facts
0xchat	Keet
Free The homepage does not list any price or paid tier.	Free Free to download and use.
Android, iOS	Windows, macOS, Linux, Android, iOS
No phone number or email address needed, only a Nostr private key End-to-end encrypted direct messages and private groups	No phone number or email needed to sign up Messages, calls and files go directly between peers with end-to-end encryption
Losing the private key means losing the identity Contacts need a Nostr client to reach you	Losing the 24-word seed phrase can mean losing access to your identity Peer-to-peer design depends on participants' devices rather than a server
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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