4th. Everyone always forgets Aliyun. Google is an also-ran in cloud and will probably scrap it at some point. Look out for it on https://killedbygoogle.com/
> In 2018, in the Infrastructure as a Service (IaaS) segment of the cloud, Alibaba Cloud had 43% market share while Tencent had an 11.5% market share in 2018.
I do hope Aliyun starts offering in the US soon- would benefit competition.