-   So is PostHogThe single platform to analyze, test, observe, and deploy new features ★ 29.8K Analytics Feature flagging A/B testing License: MIT ExpatPostHog provides open-source web & product analytics, session recording, feature flagging and A/B testing that you can self-host.  
Sure, Amplitude is awesome.
But have you considered these open source alternatives?
They are free, self-hostable and community-driven.
Check by yourself: PostHog .