How to run android in the cloud without any downtime

I’m currently using an Auto responder for my WhatsApp messages. But this responder only works when I have my phone online hence I was my phone to be always on line. Is it possible to run an android cell phone on the cloud that is always hence it is always online and can receive messages and auto respond accordingly? I want to download apps from the playstore & do all normal cellphone things just online.

Please help.