I'm using Azure.

Mostly because of this very little known offering called the Microsoft Action Pack subscription: https://mspartner.microsoft.com/en/ca/Pages/Membership/actio...

It costs around $500 per year, offers your company access to a large number of Microsoft software licenses, free access to seats of Office 365 Enterprise (for hosted email on your own domain, in addition to the software), and most importantly, $110 in Azure credits per month.

The Azure credits alone make this an amazing deal that essentially cuts all Azure pricing by more than half, making it more than competitive with AWS/GCE/DO on the pricing front.