PostHog

PostHog builds tools for product engineers to understand customer behavior, investigate problems, and improve software. Its platform combines product analytics, session replay, feature flags, experiments, error tracking, and AI observability. A context warehouse brings product data together with external business data so people and agents can query it directly. Its self-driving development approach connects that context to automated problem diagnosis, bug fixes, and pull requests, with access through web, Slack, desktop, CLI, and MCP interfaces.

Founded in 2020 by James Hawkins and Tim Glaser, who serve as co-CEOs, PostHog began as open-source product analytics for developers. Its engineering approach includes HogQL, a translation layer over ClickHouse SQL that simplifies access to event and person properties and automatically adds joins across tables. Engineers can use it to filter events, extend analytics, and write custom queries within the same platform.

As of August 2026, the company reported more than 500,000 teams, with 98% of customers using PostHog free. Paid products use usage-based pricing with monthly free tiers. PostHog became cashflow positive in December 2024 and announced a $75 million Series E in 2025, led by Peak XV Partners at a $1.4 billion valuation.