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