PostHog - Open source product analytics on your infrastructure.
June - Instant analytics reports, built on top of Segment
Mixpanel - Mixpanel is the most advanced analytics platform in the world for mobile & web.
ProfitWell Engagement - Free product usage analytics for teams who care about growth
Pulsetic - Pulsetic makes monitoring your SaaS products simple and easy with Status badges to show the status of the site without changing pages and you will also be alerted when your site goes down.
Countly - Product Analytics and Innovation. Build better customer journeys.