Analytics providers for a cross-platform mobile project

I've been researching analytics solutions for a Unity project that's targeted for iOS/Android. I'm considering 6 possible service providers that each offer free analytics accounts with minimal limitations. They are listed below in order of popularity (a rough estimate calculated based on the Alexa rank of their website). I've also included a few other notes:

• Google Analytics - free official Unity SDK (beta)
  
• Flurry - paid Unity SDKs by Prime31/Neatplug, no REST API (won't support...

Analytics providers for a cross-platform mobile project