Google Analytics 4
PartialFree but learning-curve-heavy site analytics
GA4 succeeded Universal Analytics with an event-based model. Strengths: free + tight inte…
JS SDK with a few lines of code; web, iOS, Android, and server clients available.
None.
N/A.
Cloud data hosted in US or EU; self-hosted is fully under your control.
Free but learning-curve-heavy site analytics
GA4 succeeded Universal Analytics with an event-based model. Strengths: free + tight inte…
Cookie-less, privacy-first lightweight analytics
Plausible is open-source, cookie-less, and ships a sub-1KB script. It is GDPR-friendly ou…
Product behavior analytics and funnels
Mixpanel turns user actions into events and supports funnels, retention, cohorts, and A/B…
PostHog combines product analytics, feature flags, session replay, A/B testing, and surveys into a single open-source platform. The cloud version offers 1M events/month free; the self-hosted edition is fully free.