Comment by niutech

Some good Firebase alternatives:

https://parse.com/ - freemium

http://backendless.com/ - freemium

http://www.kinvey.com/ - freemium

http://deployd.com/ - open source

http://firehose.io/ - open source

http://www.baasbox.com/ - open source

https://www.meteor.com/ - open source