PostHog
“The open-source product analytics platform that replaces your entire analytics stack.”
PostHog is an open-source product intelligence platform that consolidates what used to require four or five separate tools into a single environment: product analytics, session replay, feature flags, A/B testing, surveys, error tracking, and data warehouse sync. Founded in 2020 and backed by Y Combinator, PostHog has become the default analytics platform for engineering-led teams who want transparent pricing, no per-seat taxes, and the ability to self-host for complete data control. The free tier is the most generous in the analytics category — 1 million events, 5,000 session recordings, and 1 million feature flag requests per month, all without a credit card.
Tech Specifications
“PostHog is the most defensible analytics investment for product and engineering teams in 2026. The free tier alone replaces tools that collectively cost $200–500/month at comparable usage limits. The consolidation economics are strongest for teams between Series A and Series B — complex enough to need the full stack, cost-conscious enough to appreciate the pricing model. If you are a non-technical founder who primarily wants to understand which marketing channels drive revenue, start with Datafast instead.”
Key Features
- Product analytics — funnels, retention, paths, lifecycle analysis, and user timelines with full SQL access to your event data
- Session replay — 5,000 recordings/month free, with rage-click detection, network monitoring, and console log capture
- Feature flags — 1 million requests/month free, multivariate flags, percentage rollouts, and user targeting by property
- A/B experiments — built on feature flags, with statistical significance testing and impact measurement on any metric
- Surveys — in-app and email surveys with conditional logic, 1,500 responses/month free
- Error tracking — 100,000 exceptions/month free with stack traces and session replay linking
- Data warehouse — sync from Stripe, Hubspot, Salesforce, Zendesk, and BigQuery directly into PostHog for cross-source analysis
- PostHog AI — natural language querying, AI-powered session summaries, and anomaly detection (2,000 credits/month free)
- Open source and self-hostable — full data control with no vendor lock-in, EU and US cloud hosting available
- Unlimited team members on all plans — no per-seat pricing at any tier