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.

Clicky - Clicky Web Analytics is a simple way to monitor, analyze, and react to your blog or web site's traffic in real time.

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.

Matomo - Matomo is an open-source web analytics platform

Histats - Start tracking your visitors in 1 minute!

Open Web Analytics - Open Web Analytics - Web Analytics – Open Source Web Analytics Framework