PostHog
Open-source product analytics, replay, flags and experiments in one self-hostable platform.
What it is
PostHog bundles product analytics, session replay, feature flags, A/B testing, surveys and error tracking, available as cloud or fully self-hosted. For a team that would otherwise buy four products, the consolidation is the point — and the generous free tier means small teams often pay nothing.
Best for
Where it is strong
- Replaces four or five separate subscriptions with one bill and one SDK.
- Free tier is large enough for real production use at startup scale.
- Open source with a credible self-hosting path.
Where it falls short
- Individual modules are less deep than category specialists.
- Self-hosting at scale is a serious infrastructure undertaking.
- The product surface changes fast, which means occasional churn.
Pricing
Free tier available
Free tierFree tier: Large monthly free allowance across every product, plus free self-hosting.
What drives the bill: Usage-based pricing per product with a substantial free tier; most small teams stay free indefinitely.
Check current pricing on PostHog’s siteFigures are indicative and were last reviewed August 2026. Vendors change pricing often; confirm before you commit.
Works with
What people who use PostHog say
No reviews of PostHog yet. If you have used it in anger, yours would be the first.
Alternatives to PostHog
If PostHog is not the right fit, these solve the same problem differently.
Amplitude
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Behavioural product analytics with strong cohort and retention analysis.
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Statsig
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Feature flags, experimentation and product analytics in one warehouse-friendly platform.
GrowthBook
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Open-source feature flags and experimentation that runs on your data warehouse.