Aside from several other companies offering AWS cost analysis as a service, there is also Netflix ice (https://github.com/Netflix/ice) if one wants an open-source, self-hosted solution.

AWS also published a quick guide how to get the billing data into Redshift and use Quicksight to analyze it: https://aws.amazon.com/de/blogs/aws/new-upload-aws-cost-usag...

If you have the money to spend, Cloudcheckr, cloud health & cloudability are great. Some of their APIs are lacking which makes going with the DBR ingestion solution a good idea for large organizations.