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SimpleX Chat vs qTox: catalog facts
SimpleX Chat	qTox
Free Free and open source under the AGPL 3.0. The company is funded by investment and…	Free Free and open source under the GPL.
Windows, macOS, Linux, Android, iOS, Command line	Windows, macOS, Linux
No user identifier of any kind, so conversations cannot be correlated by account Double ratchet encryption with an additional layer for the relay servers	Peer-to-peer encrypted messaging without a central server Voice, video and file transfer in one client
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	Contacts must also use Tox Smaller user base than mainstream messengers
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0
No account needed	Not stated if an account is 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.