Autoscale is now generally available. We've added new features since we first released it as a preview version: support for both performance- and schedule-based autoscaling, along with an API and .NET SDK
so you can scale by any performance counters that you define.
Autoscale supports all four Azure compute services: Cloud Services, Virtual Machines, Mobile Services and Web Sites. For Virtual Machines and Web Sites, Autoscale is included as a feature in the Standard mode, and for Mobile Services, it's included as a part of both Basic and Standard modes.
There's no additional charge for Autoscale, besides the cost for the underlying compute service.