What features do you need?<p>You might want to look at this:<p><a href="http:&#x2F;&#x2F;www.kinvey.com&#x2F;blog&#x2F;3652&#x2F;the-evolving-enterprise-backend-as-a-service-ecosystem" rel="nofollow">http:&#x2F;&#x2F;www.kinvey.com&#x2F;blog&#x2F;3652&#x2F;the-evolving-enterprise-back...</a><p>(the infographic on the blog)<p>If you need to spin-up notifications support quickly, Parse is pretty good.  You can roll your own, but Parse is free until you get big.