Google Analytics vs PostHog
Google Analytics 4 vs PostHog — compare web analytics vs full product analytics, pricing models, and when each tool fits.
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Feature comparison
| Feature | Google Analytics 4 | PostHog |
|---|---|---|
| Cookieless | — | — |
| GDPR-friendly | — | — |
| Realtime data | ✓ | ✓ |
| Custom events | ✓ | ✓ |
| Funnels | ✓ | ✓ |
| Heatmaps | — | — |
| Session recordings | — | ✓ |
| A/B testing | — | ✓ |
| Product analytics | ✓ | ✓ |
| Self-hostable | — | ✓ |
Quick answer
Google Analytics 4 answers “how much traffic does my site get and where does it come from?” PostHog answers “what are users doing inside my product and which features drive retention?” They overlap on pageviews but serve different primary use cases.
Use case fit
| Scenario | Better choice |
|---|---|
| Marketing website or blog | GA4 or a privacy tool like Plausible |
| SaaS product with user accounts | PostHog |
| Content site with ad attribution | GA4 |
| Feature flags and A/B tests | PostHog |
| Free analytics for high traffic | GA4 |
Pricing models
GA4 is free for most sites — you pay with data shared to Google’s ecosystem. PostHog uses event-based pricing with a generous free tier (1M events/month) and usage-based billing above that.
For a marketing site with 500K monthly pageviews, GA4 costs nothing. PostHog may also be free at that volume if pageviews are your only events, but custom product events add up quickly.
Feature depth
GA4 provides web analytics, basic funnels, and Google Ads integration. PostHog provides event-based product analytics, session replay, heatmaps (via integrations), feature flags, and experiment frameworks.
If your team includes developers building a product, PostHog’s developer experience and open-source model are strong advantages.
Privacy
GA4 requires cookie consent in many jurisdictions. PostHog collects identified user data for product analytics — it’s a different privacy model, not necessarily a more private one. Evaluate based on your data processing requirements.
Bottom line
Don’t pit these tools as direct competitors unless you only need pageview tracking. For marketing analytics, GA4 (or a privacy alternative) wins on cost and ecosystem. For product teams shipping features weekly, PostHog is the more capable platform.
Frequently asked questions
- Is PostHog a replacement for Google Analytics?
- For basic website traffic reporting, PostHog can replace GA4. PostHog shines when you need product analytics — tracking user journeys, feature adoption, and running experiments.
- Is PostHog free?
- PostHog Cloud includes 1 million events per month free. GA4 is free for most websites. Compare ongoing costs with our pricing calculator as your event volume grows.
- Which is better for a SaaS product?
- PostHog is generally the better fit for SaaS. It supports user identification, funnels, retention analysis, feature flags, and A/B testing out of the box.
- Can PostHog be self-hosted?
- Yes. PostHog offers open-source self-hosting for teams that want full data control. GA4 is cloud-only through Google.
Try these tools
Google Analytics 4
PostHog