MetricTrail vs PostHog
PostHog does everything.
MetricTrail does the one thing you check daily, lighter.
PostHog bundles analytics, feature flags, session replay, surveys and A/B testing into one heavy SDK. If you just need to know why visitors leak — with real Core Web Vitals, real React errors, and real conversion, correlated — MetricTrail ships a fraction of the JavaScript and gets there without plugins.
Feature by feature
| Feature | MetricTrail | PostHog |
|---|---|---|
| SDK bundle size | < 5 KB | > 120 KB |
| Data latency | Real-time, no batch delay | 5–15 seconds |
| React error boundary tracking | Native auto-capture | Requires a heavy Sentry plugin |
| Real-user Core Web Vitals (RUM) | Built-in P75 LCP/INP/CLS | Separate plugin |
| Cookieless / no GDPR banner | 100% compliant by design | Configurable, not default |
| Individual visitor session timelines | Full journey, event by event | Available |
| Channel ROI & comparative deltas | Built-in (▲ +X%) | Manual setup |
| AI-generated insights in plain language | Included on Pro & Scale | Add-on, heavier setup |
When PostHog is actually the right call
To be direct: if you need feature flags, session replay, surveys and A/B testing under one roof and are fine with the extra SDK weight and plugin setup, PostHog's breadth is hard to match. MetricTrail is narrower on purpose — Web Vitals, errors, and conversion, correlated, in a SDK small enough that it doesn't show up in your own performance budget.
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