Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.
Eyequant - We’ve built an artificial intelligence that instantly predicts how users will see your website so that you can create landing pages that sell
Clicky - Clicky Web Analytics is a simple way to monitor, analyze, and react to your blog or web site's traffic in real time.
Attention Insight - Maximize advertising campaign results and design performance with pre-launch analytics.
Matomo - Matomo is an open-source web analytics platform
Heurix.io - Heurix is a free heuristic evaluation tool that helps you work out how to improve your website.