Offen is an open-source web analytics tool that its makers describe as lightweight, self-hosted and free. It shows page views, users, top pages and weekly retention, with filters for URL, location, referrer and UTM parameters, among others. One installation can serve several websites, and accounts can be shared within teams. Visitors give consent through a customisable banner and can view and delete their own data. According to the project, usage data is end-to-end encrypted and the server cannot decrypt it. Offen uses first-party cookies only.
The code is licensed under Apache-2.0. You run Offen yourself, as a single binary or a Docker image, optionally with SQLite; the website mentions no hosted service. The data then sits on your own infrastructure, in the region of your choice. The website is operated by Frederik Ring in Berlin and hosted by Hetzner in Germany. The project was partly funded by NLnet's Next Generation Internet programme. According to its makers, all components have been mature since summer 2024.