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.
Zonka Feedback - Top feedback app designed to collect customer feedback on iPad & Android tablets, Online Surveys on Website, Mobile, Email & SMS. Track NPS & Other Metrics.
Mixpanel - Mixpanel is the most advanced analytics platform in the world for mobile & web.
KeySurvey - KeySurvey provides survey and questionnaire tools.
Matomo - Matomo is an open-source web analytics platform
FeedbackServer - asp.net survey software Web based and open source software, for purchase or hosted, written in ASP.NET for Nsurvey