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License:MIT (core)
Open source Self-hostable API available Sign-up required

PostHog

About

Open-source product analytics with event tracking, session replay, feature flags, experiments and a data warehouse. Privacy-friendly alternative to Google Analytics and Amplitude.

Pricing

Free / monthly

PostHog is an all-in-one product analytics platform — event tracking, session replay, feature flags, A/B testing and SQL queries over your data. It is open source and can be self-hosted.

Key Features

  • Product analytics with funnels, trends and retention.
  • Session replay to see what users actually do.
  • Feature flags for gradual rollouts.
  • Experiments / A/B testing built in.
  • Data warehouse with SQL insights.
  • Privacy-friendly: cookieless tracking, GDPR-ready.

Pricing

  • Free tier: 1 million events/month, unlimited seats.
  • Paid: from ~$0.00002/event with volume discounts.
  • Self-hosted: free, MIT-licensed core (some features under other licenses).

Getting Started

npm install posthog-js
posthog.init('<your-api-key>', { api_host: 'https://us.i.posthog.com' });
posthog.capture('event_name', { property: 'value' });

Create a project at posthog.com and events flow into your dashboard immediately.