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SimpleX Chat vs 0xchat: catalog facts
SimpleX Chat	0xchat
Free Free and open source under the AGPL 3.0. The company is funded by investment and…	Free The homepage does not list any price or paid tier.
Windows, macOS, Linux, Android, iOS, Command line	Android, iOS
No user identifier of any kind, so conversations cannot be correlated by account Double ratchet encryption with an additional layer for the relay servers	No phone number or email address needed, only a Nostr private key End-to-end encrypted direct messages and private groups
Connecting means exchanging a link or QR code in person or elsewhere No contact list means a lost device is a lost set of conversations unless backed up	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: AGPL-3.0	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 1, 2026

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