PostHog is an open-source product analytics platform that enables engineering and product teams to track events, build funnels, run A/B tests, record sessions, and manage feature flags — all on their own infrastructure or via cloud. It was founded in 2020 with a mission to give companies full control over their product data without vendor lock-in. PostHog has grown rapidly into a comprehensive product OS used by thousands of companies worldwide.

PostHog is in a strong growth phase, expanding its all-in-one product OS vision with new features including data warehouse, surveys, CDP capabilities, and error tracking added to the core platform. The company has a large and active open-source community with tens of thousands of GitHub stars and strong developer word-of-mouth. Revenue is growing rapidly as they convert self-hosted users to their cloud offering and upsell larger teams.

PostHog is well-positioned to become the default product infrastructure layer for engineering-led companies, competing not just with analytics tools but with entire categories including session recording, feature management, and experimentation. The open-source model creates a strong moat through community contributions and trust, particularly with privacy-conscious European customers. A future Series C or growth round seems likely as they scale go-to-market and expand enterprise features.