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Software · Internet & communication

GNUnet Messenger

GNUnet Messenger is a messaging program, available on Linux: group chats and calls.

  • Completely free
  • Linux
  • Open source

Overview

GNUnet Messenger is a messaging program, available on Linux.

Features described in its Flathub listing: group chats and calls.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Messenger-GTK is a convergent graphical messaging application using the GNUnet Messenger service.” — Flathub, 10 November 2026
  • “Creating direct chats and group chats” — Flathub, 10 November 2026

At a glance

GNUnet Messenger is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (AGPL-3.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

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.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 8 November 2026
  • Description from Flathub — AppStream (Flathub)

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