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SimpleX Chat vs Tox: catalog facts
SimpleX Chat	Tox
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, with no ads or paid features.
Windows, macOS, Linux, Android, iOS, Command line	Self-hosted
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 central servers that can be shut down or asked to hand over data Encrypted text, voice, video, screen sharing and file transfers
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	Core library has not been independently audited for cryptography Security model is not yet fully specified
Downloadable app	Downloadable app, Self-hosted
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 October 2, 2026

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