Cloudways manages cloud hosting services besides AWS and Google Cloud. You can also choose Digital Ocean, Vultr, or Linode. (Vultr gives you the most speed for the buck).
SendInBlue is a replacement for Mail Chimp, the service mentioned in the article. If you’re worried about personal email try Proton Mail.
Ok thanks for the explanation. There's no indication that sendinblue will be any different from mailchimp. They could pull the plug just as easily.
As for the servers and applications that's fine if you just need a virtual server with some apps. I know vultr has bare metal and maybe some of the others do too. But if you aren't on bare metal and get hit with DDOS like FR does, they will pull you off their virtual server in a heartbeat to protect their other customers.