PostHog 是开源产品分析平台，一站式提供产品分析、会话回放、功能开关、A/B 测试与 AI 洞察，可自托管且免费额度充足，是增长团队替代 GA 与 Mixpanel 的热门选择。 GitHub Stars: 37k+
Best open-source product analytics platform - product analytics, session replay, feature flags, A/B testing and AI-powered insights in one stack. Self-hostable with generous free tier. GitHub Stars: 37k+