Content Square - Qualitative, quantitative and live testing to improve the user experience.
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.
Mode - A complete analytical toolkit, free forever
StatCounter - StatCounter is a simple but powerful real-time web analytics service that helps you track, analyse and understand your visitors so you can make good decisions to become more successful online.
Kompyte - Track & analyze competitors in real time.
Matomo - Matomo is an open-source web analytics platform