DuckRails vs Google Cloud Endpoints: What are the differences?

DuckRails: Open source development tool for mocking API endpoints. DuckRails is an open source development tool that helps developer mock API endpoints quickly & dynamically outside the application code; Google Cloud Endpoints: Develop, deploy and manage APIs on any Google Cloud backend. An NGINX-based proxy and distributed architecture give unparalleled performance and scalability. Using an Open API Specification or one of our API frameworks, Cloud Endpoints gives you the tools you need for every phase of API development and provides insight with Google Cloud Monitoring, Cloud Trace, Google Cloud Logging and Cloud Trace.

DuckRails and Google Cloud Endpoints can be primarily classified as "API" tools.

DuckRails is an open source tool with 1.59K GitHub stars and 84 GitHub forks. Here's a link to DuckRails's open source repository on GitHub.