cloud_comparsion_2018
https://kinsta.com/blog/google-cloud-vs-aws/
https://www.upguard.com/articles/google-compute-engine-vs-amazons-aws-ec2
https://www.redpixie.com/blog/aws-vs-azure-vs-google-cloud
https://cloud.google.com/free/docs/estimate-costs-google-cloud-platform