Mixpanel - Mixpanel is the most advanced analytics platform in the world for mobile & web.
Optimizely - A/B testing you'll actually use.
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.
Flurry - Personalizing The Mobile Experience
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
Amplitude - Mobile analytics: come with questions, leave with answers