Bellerophon vs LocalStack: What are the differences?
Bellerophon: Generate AWS CloudFormation templates from existing AWS resources. Bellerophon will make AWS SDK calls to get information about the resources in your AWS environment. Once the resources are retrieved, you can add them to the CloudFormation template. You can view the template by going to File > Show Template. Once you are happy with the design of the template, you can choose File > Save Template; LocalStack: A fully functional local AWS cloud stack (by Atlassian). LocalStack provides an easy-to-use test/mocking framework for developing Cloud applications.
Bellerophon and LocalStack can be primarily classified as "AWS" tools.
Bellerophon and LocalStack are both open source tools. Bellerophon with 142 GitHub stars and 6 forks on GitHub appears to be more popular than LocalStack with 66 GitHub stars and 22 GitHub forks.