Newman vs Postman: What are the differences?
What is Newman? CLI collection runner for Postman. Newman is a command-line collection runner for Postman. It allows you to effortlessly run and test a Postman collection directly from the command-line. It is built with extensibility in mind so that you can easily integrate it with your continuous integration servers and build systems.
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.
Newman and Postman can be primarily classified as "API" tools.
Newman is an open source tool with 3.67K GitHub stars and 524 GitHub forks. Here's a link to Newman's open source repository on GitHub.