Both are strong choices. The short answer: pick Google Analytics 4 if you are every site, especially with Google Ads. Pick PostHog if you are engineering-led teams that want it all.
| Google Analytics 4 | PostHog | |
|---|---|---|
| In one line | The free default for website and app analytics. | Open-source product analytics, flags, replays and more. |
| Pricing | Free | Generous free tier; usage-based |
| Free tier | Yes | Yes |
| Best for | Every site, especially with Google Ads | Engineering-led teams that want it all |
| Category | Analytics & Heatmaps | Analytics & Heatmaps |
| Website | analytics.google.com | posthog.com |
Google Analytics 4 details PostHog details