Compare software

SimpleX Chatsignal-cli
Free

Free and open source under the AGPL 3.0. The company is funded by investment and…

 Free

The open-source software is available without a license fee. Hosting, hardware and…

Windows, macOS, Linux, Android, iOS, Command line Windows, macOS, Linux, Command line
  • No user identifier of any kind, so conversations cannot be correlated by account
  • Double ratchet encryption with an additional layer for the relay servers
  • Provides a daemon interface for notification integrations.
  • 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 a registered or linked Signal account.
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

Checked September 21, 2026

Checked September 22, 2026

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