Mockoon and Postman logos side by side

Comparison between Mockoon and Postman's API mocking

Discover the differences between Postman's API mocking and Mockoon's desktop application and CLI mocking features

Postman is an online platform and desktop tool enabling developers to design and test APIs. Postman also includes an API mocking feature integrated into their application. While not an API mocking tool first, it allows running cloud mock endpoints out of a collection of responses received while testing an API.

However, Mockoon provides a more powerful mocking experience by including more features out of the box. It is easy to use and has no learning curve. You can easily start using it and create your first mock API in under a minute. From a powerful templating system to generate dynamic and realistic mock data to a proxy mode to partially mock API endpoints, Mockoon takes API mocking to the next level. It also offers a CLI and Docker image to deploy your mocks anywhere and many customization options (status codes, dynamic headers, rules system, etc.).

Postman (left) and Mockoon (right) UIs side by sidePostman (left) and Mockoon (right) UIs side by side

 Features comparison

Offline/Cloud basedCloud only
Deployed on a subdomain
Offline (desktop application)
Deploy anywhere with the CLI, Docker image and GitHub Action
Free/paid servicePaid
Free, up to 3 users and 1000 calls/month
Some tools are open-source but not the API mocking feature
A CLI, Docker image and GitHub Action are available
Proxy mode
OpenAPI support
Mocks can be created from previously called endpoints

Mockoon can create mock endpoints based on entering requests
CRUD operations
Automated CRUD endpoints with fake databases
Response rules
Simple matching algorithm

Advanced system of rules
Dynamic/realistic data
Basic fake data can be generated with dynamic variables

Advanced templating system and AI assistant to generate realistic fake data
File serving
Custom headers
At endpoint's level

At endpoint's and server's levels
Supports templating helpers for dynamically generated headers
Customizable status code
Route regex
GraphQL support
CORS and pre-flight handling
CORS is enabled on the remote server

Automatically answers 200 to OPTIONS pre-flight requests
Headers can be customized
Slow network/server simulation
At server's level

At server's and endpoint's levels