Wire - Simply the most Secure Messenger
wire.com
Always-on end-to-end encrypted instant messaging, voice- and videoconferencing with up to 100 participants - future proof with MLS integration

It’s based on Signal protocol and it’s also open source. However, unlike Signal it doesn’t harvest phone numbers.

https://github.com/wireapp

  • CO5MO ✨
    1•8 months ago

    Looks like it is listed on the iOS App Store ‘App Privacy’ section for the Wire app.