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Kryfo vs 0xchat: catalog facts
Kryfo	0xchat
Free Free and open source under GPL-3.0; optional anonymous backing supports development.	Free The homepage does not list any price or paid tier.
Android	Android, iOS
No phone number or email needed End-to-end encrypted chats and groups	No phone number or email address needed, only a Nostr private key End-to-end encrypted direct messages and private groups
Pre-alpha and not yet audited Android only	Losing the private key means losing the identity Contacts need a Nostr client to reach you
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	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 8, 2026	Official website Full listing and sources Checked October 1, 2026

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