PostHog is a product data platform that stores analytics, session replays, errors, and warehouse data in one place. Teams query it directly or through AI assistants with an MCP integration.

Product analytics - Chart funnels, trends, and retention on event data, with SQL access to the warehouse.
Session replay - Watch recordings of user sessions with console logs and network activity.
Feature flags and experiments - Roll out to selected users and measure A/B tests on the same data.
Surveys and workflows - Ask users questions in the product and trigger actions from findings.
Data pipelines - Import from over 100 sources such as Stripe, Postgres, and HubSpot.

It is used by product and engineering teams that want analytics, replay, and experimentation on one data store.

Pricing is usage-based with monthly free tiers: product analytics includes 1 million events, session replay includes 5,000 recordings, feature flags include 1 million requests, and warehouse includes 1 million rows; paid use is billed per event, recording, request, or row.