Learn
Short, evergreen explainers for analytics concepts. Learn the vocabulary here, then use our comparisons, guides, and tool profiles when you are ready to choose.
Performance
Analytics Script Performance Benchmarks (2026)
Recorded transfer size, decoded weight, and Slow 4G page-load overhead for Fathom, Plausible, DataFast, PostHog, and GA4 — measured on AnalyticsVS controlled fixtures, never estimated.
Primers
Pageviews vs Events: Which Should You Track?
When pageview analytics is enough, when you need custom events, and how that choice maps to privacy tools vs GA4 vs product analytics.
Concepts
Analytics Events: What They Are and Why They Matter
What an analytics event is, how it differs from a pageview, and why GA4 and PostHog treat named actions as the unit of product insight.