Google Analytics is free and legal. You pay for it in another currency: a cookie banner your visitor has to click through, and data on Google's servers. Anyone who wants the banner gone starts looking for a tool that needs no consent.
This is not a ranking. Datrika is one of the tools on the list and we wrote the list, so putting ourselves first would mean nothing. Each entry says where that tool is weaker.
Prices on the cards are for 100,000 requests a month. What fills that counter differs from tool to tool: we and Plausible count events, Fathom pageviews, Matomo hits, Piwik PRO actions, Trackless visits.
The question people ask first, what to replace Google Analytics itself with, gets its own page: Google Analytics alternative with no cookie banner. The tool closest to GA4 feature for feature has one too: Matomo alternative. The tool we get compared to most often has one as well: Plausible alternative. The German tool that measures the way we do but keeps funnels on its top plan has one as well: Pirsch alternative.