Beta Family - 50,000 testers to test your app
Erli Bird - For developers & testers alik
UTest - uTest is the world's largest professional network for software testers and test engineers - 175,000+ QA professionals from more than 200 countries and territories.
TestFlight - iOS beta testing on the fly.
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.
Visual Studio App Center - Continuous everything – build, test, deploy, engage, repeat