PostHog review

Amplitude, Hotjar and LaunchDarkly under one login

PostHog started as an open-source product analytics tool and turned into a suite: event analytics with funnels, retention and cohorts, session replay, feature flags, A/B testing, surveys, error tracking, and a small data warehouse, all under one login and one bill. If you have ever paid separately for Amplitude, Hotjar, and LaunchDarkly, PostHog's pitch is that it replaces all three.

The pricing model is the interesting part. Instead of seats or a plan ladder, each product carries its own monthly free allowance, and you only pay per unit beyond it. That makes the free tier unusually usable: you are not locked out of session replay or feature flags to force an upgrade, you just get 5,000 recordings and 1 million flag requests a month of them.

Teams paying three bills for analytics, replay and flags

• Product and growth teams who want analytics, replay, and feature flags without three subscriptions
• Startups whose event volume is real but still under a million a month
• Engineers comfortable with SQL, since PostHog rewards people who query their own data
• Anyone whose event bill at Amplitude or Mixpanel outgrew what they got back from it

1 million events free, then priced at $0.00005 each

Verified on PostHog's pricing page on 20 July 2026, the monthly free allowances are 1 million product analytics events, 5,000 web session replays and 2,500 mobile replays, 1 million feature flag requests, 1,500 survey responses, 100,000 error tracking exceptions, and 1 million data warehouse rows. No credit card is required to get any of it. Heatmap data is explicitly excluded from billing.

Past the free tier, pay-as-you-go rates start at $0.00005 per event, $0.005 per web recording, $0.0001 per flag request, $0.10 per survey response, and $0.00037 per exception, and the per-unit price drops as your volume rises. Those are starting rates on a tiered scale rather than flat prices.

The event counter is the limit that bites first

• It is the heaviest tool here. The client bundle and the interface are both a lot next to a script like GoatCounter's
• Events are easy to overspend. One noisy autocapture setting can turn a free account into a paid one in a week
• Self-hosting exists in the repository but is not meaningfully supported, so do not choose PostHog for that reason
• The learning curve is real. Funnels, cohorts, and retention reward people who already think in events
• The license is mixed rather than fully open, with the ee/ directory under separate enterprise terms

PostHog if you ask why, Umami if you ask how many

If your question is "which page got traffic", PostHog is far more tool than you need and Umami will make you happier. If your question is "where do users drop out of onboarding, and can I ship a fix behind a flag and watch it work", nothing else on this list comes close, and the free tier will genuinely carry a small product for months. Watch the event counter, keep autocapture on a short leash, and it stays free longer than you would expect.