Offen

About Offen

Offen is an open-source, self-hosted web analytics tool built around explicit user consent and data transparency. Site operators install a code snippet to track pages, while visitors must opt in before any data collection occurs and can review, export, or delete their own usage data at any time. The tool uses first-party cookies only, encrypts user data end-to-end, and retains it for six months before automatic deletion.

The operator dashboard (called the Auditorium) provides metrics such as unique users, unique sessions, top pages, referrers, location, UTM parameters, landing pages, exit pages, and weekly retention, with support for tracking multiple websites from a single installation and sharing website accounts across teams. Users get a parallel view showing which sites they've visited and their own session data across installations.

The product is aimed at website operators who need GDPR-compliant analytics without relying on third-party ad-tech or external data sharing. It is free to use, with source code available on GitHub, documentation for self-hosting, and a consent banner that can be customized in color, shape, and font, and localized into English, French, German, Portuguese, Spanish, and Vietnamese.

Key features

• Self-hosted, open source web analytics
• End-to-end encrypted, opt-in user data collection with GDPR compliance
• Users can review, export, or delete their own usage data at any time
• First-party cookies only, no third parties or ads
• Multi-website support with shared team accounts
• Available in English, French, German, Portuguese, Spanish, and Vietnamese

Frequently asked questions