TestFlight - iOS beta testing on the fly.
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.
TestFairy - Painless Beta Testing
SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
TestApp.io - A platform that helps both mobile app developers and owners to easily share their apps with everyone to get feedback before reaching publicly to Google and App stores.
Countly - Product Analytics and Innovation. Build better customer journeys.