When comparing Azure Web Apps vs Google App Engine, the Slant community recommends Google App Engine for most people. In the question“What are the best Backend as a Service providers for webapps?” Google App Engine is ranked 6th while Azure Web Apps is ranked 7th. The most important reason people chose Google App Engine is:
Google App Engine integrates with Google's CDN out of the box and it distributes your application's assets through that, increasing loading speed considerably.
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Pros
Pro 10 free web apps in each datacenter
There's a free plan which provides you with up to 10 free apps hosted on each datacenter, albeit with some restrictions on hard disk size, CPU and RAM.
Pro Easily scale up and down
It's very easy to scale up or down your app in Azure. You can either scale the CPU or RAM according to your needs. There's even an option for autoscaling which lets Azure itself choose when to scale up or down depending on traffic.
Pro Increases application speed considerably
Google App Engine integrates with Google's CDN out of the box and it distributes your application's assets through that, increasing loading speed considerably.
Pro Easy to use
Google App Engine is very easy to use. All you need to do is install the SDK (which in itself is easy as well, and the documentation is very heplful) and run the command needed depending on the type of project to deploy it.
For example, to deploy a golang application, you run golang deploy
inside the project folder and it will be automatically deployed.
Cons
Con Not a core Google product faces uncertin future
Google is notorious with flipping on technology directions, this product is clearly not the focus of Google.
Con Expenses are very hard to control
The monitoring for expenses is limited at best.
Con Problematic support even in the paid grade
Con No SQL database available
Google App Engine uses Google's NoSQL cloud database. There's no option to use a SQL database with your application.