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SimpleX Chat vs StoneAge Messenger: catalog facts
SimpleX Chat	StoneAge Messenger
Free Free and open source under the AGPL 3.0. The company is funded by investment and…	Free Free and open source under GPL-3.0-only.
Windows, macOS, Linux, Android, iOS, Command line	Android
No user identifier of any kind, so conversations cannot be correlated by account Double ratchet encryption with an additional layer for the relay servers	End-to-end encrypted messaging over user-provided storage Supports 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	Requires an S3 bucket or an invite to someone else's No voice or video calls
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0-only
No account needed	No account needed
Works offline	Needs internet
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 8, 2026

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