Messenger-GTK is a convergent graphical messaging application using the GNUnet Messenger service. The goal is to provide private and secure communication between any group of devices.
The application provides the following features:
- Creating direct chats and group chats
- Managing your contacts and groups
- Invite contacts to a group
- Sending text messages
- Sending voice recordings
- Sharing files privately
- Deleting messages with any custom delay
- Renaming contacts
- Exchanging contact details physically
- Verifying contact identities
- Switching between different accounts
- Chatting live via video or voice streaming
- Sharing your screen with a selected group
- Writing notes to yourself
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.
Screenshots
Observed history
| App | Change | Version | When ↓ |
|---|---|---|---|
| updated | 0.12.0 | 13 Oct 2026 |
Upstream releases
Release notes supplied by the developer. These dates are not Flathub package publication times.
0.12.019 Mar 2026
- Accounts will encrypt their key storage using unique secrets
0.11.017 Sept 2025
- Private chats for writing notes to yourself can be opened
0.10.28 Jan 2025
- Notifications play sounds if enabled.
- Contacts can be filtered by tags.
0.10.129 Aug 2024
- Discourses have been added for live voice and video chats with other contacts.
- Capturing a specific application or a whole monitor can be selected as video source in a live chat.