PostHog vs GrowthBook
Side-by-side from the Top 11 rankings of The 11 Best Session Replay Tools (2026) and The 11 Best A/B Testing Tools (2026). Last verified June 12, 2026.
The short answer
PostHog ranks higher on Top 11 (#7 vs #11) for Teams watching real user sessions and heatmaps / Growth teams running experiments. Best open-source platform with replay, analytics, and feature flags.
At a glance
| PostHog | GrowthBook | |
|---|---|---|
| Top 11 rank | #7 / The 11 Best Session Replay Tools (2026) | #11 / The 11 Best A/B Testing Tools (2026) |
| Score (out of 9.4) | 8 | 7.4 |
| Best for | Open-source analytics suite | Open-source testing on your data warehouse |
| Pricing | $$ (Usage-based) | $ (Free to custom) |
| HQ | San Francisco, USA | San Francisco, USA |
| Founded | 2020 | 2020 |
GrowthBook
An open-source tool that runs on your data warehouse, giving you full data ownership.
www.growthbook.ioMethodology and scoring weights live at /methodology. No vendor pays for placement — see about.