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SignalJami
Free

Free; developed by a nonprofit funded by grants and donations

 Free

Free software under the GPLv3 or later. A GNU project with no paid tier.

Android, iOS, Windows, macOS, Linux Windows, macOS, Linux, Android
  • End-to-end encryption on every message and call using the open source Signal Protocol
  • No ads, affiliate marketers or tracking
  • Completely peer to peer, with no server relaying data between users
  • No phone number or email needed to create an account
  • Requires a phone number that can receive an SMS or phone call to register
  • Desktop app requires Signal to be installed on a phone first
  • Peer-to-peer delivery means messages to an offline device wait until it reconnects
  • Connection reliability varies more than with a server-relayed service
Downloadable app Downloadable app
Open source Open source
License: AGPL-3.0 License: GPL-3.0
Account needed No account needed
Needs internet Needs internet

Checked September 20, 2026

Checked September 21, 2026

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