Mycroft 🇪🇺If you're looking for a federated encrypted opensource messaging system, then please take a look at the #matrix protocol and it's different clients like #riot. They even release a video for news: https://www.youtube.com/watch?v=f6ZdmPSUUBA
Jonkman Microblog is a social network, courtesy of SOBAC Microcomputer Services. It runs on GNU social, version 1.2.0-beta5, available under the GNU Affero General Public License.
All Jonkman Microblog content and data are available under the Creative Commons Attribution 3.0 license.