Cloudureka - https://magic.cloudureka.com/#!/compare - does it for AWS, Google, Azure, DigitalOcean and Exoscale. Catch here is that it compares with the real cloud cost, assimilates details from your cloud and recommends clouds with better ROI.
(Disclaimer: I'm one of the founders of Cloudureka)
The idea behind http://theprice.cloud is to be a simple and straightforward tool to compare 3 major public cloud providers (AWS, GCP, Azure), especially in areas that other tools usually miss, for example, egress network traffic and object storage.