Pug

Pug is an open-source product analytics platform focused on recording what happens inside a product and tying those events to individual user profiles. It captures page views, clicks, scrolls, and custom events, then lets teams explore the data through trends, funnels, retention, and user flows. The project is positioned as a lightweight alternative for teams that want ownership of their analytics stack.

The core workflow starts with initializing the SDK, after which auto-tracking begins immediately without a predefined event plan. Pug is cookieless by default, writing nothing to the device until consent is granted. When a user signs in, the identify() call merges their anonymous history into a single profile, giving a unified view of activity across sessions and devices.

Pug supports web, Flutter, Node, and Ruby SDKs, and the whole stack can be self-hosted under AGPL-3.0 or used through Pug Cloud. The interface shows profile-level details such as events, sessions, pageviews, device, location, and recent activity, making it useful for product managers, developers, and growth teams who need practical behavioral insight.

For best results, start with the free cloud tier or a self-hosted instance, initialize the SDK early, and use identify() at sign-in to unify anonymous and known users. Teams should also review consent handling and hosting requirements before production use. Overall, Pug is a focused, developer-friendly option for product analytics with clear data ownership.