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SimpleX Chat vs Keet: catalog facts
SimpleX Chat	Keet
Free Free and open source under the AGPL 3.0. The company is funded by investment and…	Free Free to download and use.
Windows, macOS, Linux, Android, iOS, Command line	Windows, macOS, Linux, 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 needed to sign up Messages, calls and files go directly between peers with end-to-end encryption
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 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
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 September 23, 2026

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