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.
Optimizely - A/B testing you'll actually use.
Adobe Analytics - Adobe Analytics is an industry-leading solution that empowers you to understand your customers as people and steer your business with customer intelligence.
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
Mixpanel - Mixpanel is the most advanced analytics platform in the world for mobile & web.
Google Tag Manager - Google Tag Manager helps make tag management simple, easy and reliable by allowing marketers and webmasters to deploy website tags all in one place.