API Blueprint vs Postman: What are the differences?
What is API Blueprint? A powerful high-level API design language for web APIs. API Blueprint is simple and accessible to everybody involved in the API lifecycle. Its syntax is concise yet expressive. With API Blueprint you can quickly design and prototype APIs to be created or document and test already deployed mission-critical APIs.
What is Postman? Only complete API development environment. Postman is the only complete API development environment, used by nearly five million developers and more than 100,000 companies worldwide.
API Blueprint and Postman can be categorized as "API" tools.
API Blueprint is an open source tool with 7.48K GitHub stars and 2.07K GitHub forks. Here's a link to API Blueprint's open source repository on GitHub.