Limbar runs the emulator for you in the cloud and lets you control remotely as well as provides adb tunnel so that all tools in Android ecosystem can utilize it as a device. It's a true cloud; as opposed to competitors, we don't charge for concurrency so you can scale as much as you need and not worry about unused capacity.
I guess I'd need a skyscraper elevator for this pitch but bear with me please, thanks!
Here is the website https://limbar.io
(Technically, we're running our own distribution of Android without relying on qemu, hence very low usage on idle and dynamic cpu & memory dedication allowing us to provide concurrency at a low cost)