PostHog is an open-source, all-in-one product development platform designed to help engineers build, analyze, and improve software products. It combines multiple tools—traditionally spread across different services—into a single unified system for understanding user behavior and shipping better features.

The platform solves the fragmentation problem in modern product development, where teams often rely on separate tools for analytics, experimentation, error tracking, and data pipelines. PostHog consolidates these into one “Product OS,” allowing teams to collect, analyze, and act on product data in a single place.

PostHog provides deep product and web analytics, enabling teams to track user behavior through events, funnels, retention analysis, and user paths. It also includes session replay, which allows developers to watch real user interactions to diagnose issues and improve UX.

Beyond analytics, PostHog includes tools for shipping and testing features, such as feature flags, A/B experiments, and surveys. These allow teams to roll out changes safely, test impact, and gather feedback directly within their products.

A major differentiator is its integrated data infrastructure. PostHog includes a built-in data warehouse, pipelines, and integrations with external tools, enabling teams to combine product data with business data for deeper insights. It also offers an AI assistant that helps query data, generate insights, and automate workflows.

PostHog is widely used by startups and engineering teams who want a developer-first, self-serve platform that replaces multiple SaaS tools with a single, extensible system.

Key features include:

• Product and web analytics (funnels, retention, user paths)
• Session replay for observing real user behavior
• Feature flags and experimentation (A/B testing)
• Error tracking and debugging tools
• Built-in data warehouse and integrations • AI assistant for querying data and automating tasks

Common use cases include:

• Analyzing user behavior
• Debugging product issues
• Running experiments
• Rolling out new features safely
• Monitoring app performance
• Consolidating product data into a single platform

PostHog was founded in 2020 by James Hawkins and Tim Glaser and is developed as an open-source, developer-first product platform.