PostHog

PostHog gathers in one product the tools an engineering team needs to understand how its software is used. Product Analytics shows trends, funnels, user paths and retention from events captured in a web or mobile app. Session Replay lets the team watch real sessions to see where users get stuck, and Feature Flags control who sees a new feature and support A/B tests without a new deployment. Surveys, error tracking and a managed data warehouse that can be queried in SQL sit alongside. The code is open source, pricing is based on usage with a free tier, and the product is aimed at developers and product teams in startups and software companies.