Countly

A product analytics platform that tracks how people use your mobile, web and desktop apps through lightweight SDKs, then turns event data into dashboards, funnels and retention curves. It covers the engagement loop with cohorts, user profiles, crash reporting, surveys, push notifications, remote config and A/B testing, plus a natural-language assistant.

App developers and product managers use it to see which features get used, where users drop off, and which releases cause instability.

On your own servers, the event stream and user profiles stay under your control, there is no per-event fee, and a scheduled database dump gives you a restore path. The self-hosted edition can run on your own infrastructure.