Private and secure communication
The tool messenger-cli is an terminal interface for the GNUnet Messenger service. The goal is to provide private and secure communication between any group of devices.
Chats will generally created as opt-in. So you can decide who may contact you directly and who does not, accepting to a direct chat. Leaving a chat is also always possible.
The application is compatible with the Messenger-GTK graphical interface:
https://snapcraft.io/messenger-gtk