PostHog

All-in-one open-source product analytics with feature flags and session replay

Free Tier

Free: 1M events, 5K recordings/month. Pay-as-you-go beyond free tier. 98% of users pay nothing.

open-source product-analytics feature-flags session-replay ab-testing

About PostHog

PostHog is an open-source, all-in-one product analytics platform combining web analytics, session replay, feature flags, A/B testing, error tracking, and surveys. Built for product engineers, it offers unlimited seats on all plans. The generous free tier includes 1M events, 5K recordings, and 1M feature flag requests per month. Self-hosting is available under MIT license.

Highlights

✓ All-in-one: analytics, session replay, feature flags, A/B testing, surveys
✓ Generous free tier — 98% of customers use PostHog for free
✓ Unlimited seats and tracked users on all plans

Limitations

✗ Can be complex to set up all features for non-technical teams
✗ Self-hosted version requires significant infrastructure at scale
✗ Costs can grow quickly once exceeding free tier limits

Replaces

Google Analytics Free (GA4)

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Mixpanel Free up to 20M events

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Amplitude Free up to 50K MTUs

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Detailed Comparisons

Google Analytics vs PostHog → Mixpanel vs PostHog → Amplitude vs PostHog →

Free

Free: 1M events, 5K recordings/month. Pay-as-you-go beyond free tier. 98% of users pay nothing.

Visit PostHog →

Last updated: 2026-03-01