countly-server
Countly provides a comprehensive analytics platform to monitor user interactions across mobile, web, and desktop applications, offering both cloud and on-premises deployment options. With its Lite, Enterprise, and Flex editions, Countly adapts to the needs of organizations of all sizes, supporting features like session analytics, crash reporting, and customizable push notifications through a plugin-based architecture. The platform is backed by an active community and offers developers a secure, extensible API.