Google Analytics is the world's most widely used free web analytics tool, adopted by about 85% of sites using a traffic analysis tool (W3Techs). The GA4 event model processes 25 million events per month free, deeply integrated with Google Ads and BigQuery.
Amplitude is a product analytics platform founded in San Francisco in 2012 and listed on Nasdaq in 2021, known for its event-driven model with funnel, retention, path analysis, and A/B testing. The free tier offers 10,000 monthly events and Growth starts around $49-99 per month, making it a top choice for SaaS product teams.
Countly is an open-source product analytics platform founded in 2012 in London, offering self-hosted and cloud deployment with native mobile and web analytics, crash reporting, push, and A/B testing, with 15,000+ deployments worldwide per official materials.
Crazy Egg is a user behavior visualization analytics tool founded in 2005, known for click heatmaps, scroll maps, session recording, and built-in A/B testing, with Basic plans from about $29/month to help websites optimize conversion.