What are some alternatives?
HockeyApp - Manage your betas and collect live crash reports for iOS, Android, Windows Phone, and OS X apps.
TestFlight - iOS beta testing on the fly.
Install On Air - Install On Air offers Testflight and Diawi Alternative for iOS and Android App. Distribute your application in less time with best platform for app distribution.
The Beta Family - The Beta Family is a crowdsourcing platform for beta testing iOS and Android applications.
Shuttle.tools - Distribute and manage your mobile apps, all from one place. For Both iOS & Android.
AppBlade - AppBlade provides essential tools for mobile app development.