I would say don't fear for now. Google is pouring a lot of money there and want to win developers hearts. They have GA on web, to some extend, now want to grab

I would say don't fear for now. Google is pouring a lot of money there and want to win developers hearts. They have GA on web, to some extend, now want to grab your mobile and web data. I see it highly unlikely that Firebase will decelerate. As an alternative, suggesting Countly (open source) - http://github.com/countly/countly-server http://github.com/countly/countly-server - with crash reporting, push notifications and analytics.