Amazon API Gateway vs Mule ESB

• API Gateway integrates well with AWS Lambda. This allows us to build a web server in the language and framework of our choice, deploy it as a Lambda function, and expose it through API Gateway.
• API Gateway manages API keys. Building rate limiting and request quota features are not trivial (or interesting).
• API Gateway's pricing can be very attractive for services that are accessed infrequently.

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• It is best suited for Rest API development. Mule ESB uses RAML as an API descriptor which is less complex and easy to understand. RAML is an open standard majorly supported by Mulesoft. Once RAML is developed, it is very easy (a few clicks)to create flows corresponding to the resources defined in the RAML. One can also include JSON schema validation in RAML, and with the use of APIkit router, Mule ESB makes the request validation very easy (it's automatic basically.)
• Mule ESB comes with a large spectrum of community and enterprise connectors. We have connectors for all the major platforms like Facebook, Twitter, Salesforce, SAP, etc. This enables Mule ESB to integrate with the other systems in a faster and more robust way. Mule ESB has many components to fulfill the requirements of each integration (for example batch processing, parallel processing, choice, etc.)
• Mule API gateway is one of the best tools (modules) of Mulesoft's offering. It supports API governance and management very well. One can easily enforce policies on their APIs with API gateway. It enables some of the must-have features in an API solution (i.e. throttling, oAuth, access levels, etc.)
• Implementing a CI/CD (DevOps) environment for Mule ESB is a very easy task. Mule majorly uses MAVEN as its build tool, which in turn makes it best suitable for CI/CD approach. Mule also provides MAVEN plugins for auto deployments to the servers. Mule also has a best Unit testing module which is MUnit. MUnit can be used for both Unit and Functional testing, and it is easy to write and generates coverage reports in various formats.

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• I think there should be another way of enabling CORS. It basically creates OPTIONS for every endpoint, which makes your API Gateway look complicated.
• The integration timeout limit is 30 seconds, which limits you into that time.
• API Gateway UI should be improved and should work correctly when more than two people are adding/editing endpoints.

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• Make sure to not over-engineer shared components. It can complicate development
• Create a roadmap for where you are going - if not, you may miss components
• I suggest getting support, otherwise it could be a difficult learning curve

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• ROI is negative, you need either to hire them to work with you or spend days/weeks to figure out issues.
• For some of the projects in the end it is not worth it, it is just a "buzz" to use serverless but not practical.
• Service is easy to set up authorization and it is easy to manage.

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• Overall a great tool for complex integrations

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