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Tox vs SimpleX Chat: catalog facts
Tox	SimpleX Chat
Free Free and open source under GPL-3.0, with no ads or paid features.	Free Free and open source under the AGPL 3.0. The company is funded by investment and…
Self-hosted	Windows, macOS, Linux, Android, iOS, Command line
No central servers that can be shut down or asked to hand over data Encrypted text, voice, video, screen sharing and file transfers	No user identifier of any kind, so conversations cannot be correlated by account Double ratchet encryption with an additional layer for the relay servers
Core library has not been independently audited for cryptography Security model is not yet fully specified	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
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License: GPL-3.0	License: AGPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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