Radicle is an open-source, peer-to-peer code collaboration stack built on Git, which its developers call a sovereign code forge. Instead of keeping repositories with one hosting provider, it replicates them across peers: every user runs a node, and anyone can run an always-on seed node. Issues, patches and code review are stored in the Git repository as signed objects, so work continues offline. It offers a command-line tool, a web interface, a terminal interface and a desktop client, and users install and operate it themselves.
The Radicle 1.0 release was announced from Zug, Switzerland. There is no client-server model: peers act as both clients and servers. The software is released under the MIT and Apache 2.0 licences. Repository data sits on the nodes that seed it, so its location depends on where you and your collaborators run them. A European organisation can operate its own seed nodes within the EU or EFTA and keep control of its repositories.