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/
I do hope Aliyun starts offering in the US soon- would benefit competition.
source: https://finance.yahoo.com/news/alibaba-vs-tencent-battle-clo...
Aliyun (Alibaba Cloud) is doing business in US: https://alibabacloud.com/