Beta Family - 50,000 testers to test your app
Erli Bird - For developers & testers alik
TestFlight - iOS beta testing on the fly.
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.
Visual Studio App Center - Continuous everything – build, test, deploy, engage, repeat
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.