Silverpeas is an open-source collaboration platform that organisations use as an intranet or extranet. It combines electronic document management, content management, knowledge management, project documentation, picture management, data collection and a social network. Users work through a web browser or from a smartphone. Silverpeas is delivered as server software that you install yourself, including an official Docker image.
Silverpeas is developed by the French company Silverpeas, which also offers professional services. The software is freely available under the GNU Affero General Public License; the source code is on GitHub and the project site publishes new versions regularly. You can run the platform entirely on your own infrastructure, so your data stays under your control. The company also offers a cloud service; according to the vendor, its data is hosted in France and the service is GDPR-compliant. For European organisations looking for an intranet without a non-European parent company, Silverpeas is therefore an option they can operate themselves.