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Charles vs Postman: What are the differences?
What is Charles? HTTP proxy / HTTP monitor / Reverse Proxy. Charles is a web proxy (HTTP Proxy / HTTP Monitor) that runs on your own computer. Your web browser (or any other Internet application) is then configured to access the Internet through Charles, and Charles is then able to record and display for you all of the data that is sent and received.
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.
Charles and Postman can be categorized as "API" tools.
Some of the features offered by Charles are:
- SSL Proxying – view SSL requests and responses in plain text
- Bandwidth Throttling to simulate slower Internet connections including latency
- AJAX debugging – view XML and JSON requests and responses as a tree or as text
On the other hand, Postman provides the following key features:
- Compact layout
- HTTP requests with file upload support
- Formatted API responses for JSON and XML
According to the StackShare community, Postman has a broader approval, being mentioned in 1752 company stacks & 2232 developers stacks; compared to Charles, which is listed in 16 company stacks and 13 developer stacks.
From a StackShare Community member: "I just started working for a start-up and we are in desperate need of better documentation for our API. Currently our API docs is in a README.md file. We are evaluating Postman and Swagger UI. Since there are many options and I was wondering what other StackSharers would recommend?"
I use Postman because of the ease of team-management, using workspaces and teams, runner, collections, environment variables, test-scripts (post execution), variable management (pre and post execution), folders (inside collections, for better management of APIs), newman, easy-ci-integration (and probably a few more things that I am not able to recall right now).
I use Swagger UI because it's an easy tool for end-consumers to visualize and test our APIs. It focuses on that ! And it's directly embedded and delivered with the APIs. Postman's built-in tools aren't bad, but their main focus isn't the documentation and also, they are hosted outside the project.

I recommend Postman because it's easy to use with history option. Also, it has very great features like runner, collections, test scripts runners, defining environment variables and simple exporting and importing data.
OpenAPI is an excellent tool for creating interactive and hosted documents when releasing an API to the public. We will leverage this, specifically for the public facing APIs that customers can integrate into (to automate creating projects and storing experiment data). Postman is more complicated to share with others and is not as rich for documentation.
Postman supports automation and organization in a way that Insomnia just doesn't. Admittedly, Insomnia makes it slightly easy to query the data that you get back (in a very MongoDB-esque query language) but Postman sets you up to develop the code that you would use in development/testing right in the editor.
Pros of Charles
Pros of Postman
- Easy to use488
- Great tool368
- Makes developing rest api's easy peasy275
- Easy setup, looks good155
- The best api workflow out there143
- History feature53
- It's the best53
- Adds real value to my workflow44
- Great interface that magically predicts your needs42
- The best in class app34
- Can save and share script11
- Fully featured without looking cluttered9
- Collections7
- Option to run scrips7
- Global/Environment Variables7
- Dead simple and useful. Excellent6
- Shareable Collections6
- Dark theme easy on the eyes6
- Awesome customer support5
- Great integration with newman5
- Simple4
- The test script is useful4
- Documentation4
- Easy as pie3
- Saves responses3
- Makes testing API's as easy as 1,2,33
- This has simplified my testing significantly3
- API-network2
- I'd recommend it to everyone who works with apis2
- Mocking API calls with predefined response2
- Easy to setup, test and provides test storage1
- Graph1
- Postman Runner CI Integration1
- Now supports GraphQL1
- Continuous integration using newman1
- Pre-request Script and Test attributes are invaluable1
- <a href="http://fixbit.com/">useful tool</a>0
- Runner0
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Cons of Charles
Cons of Postman
- Bloated features and UI9
- Stores credentials in HTTP9
- Cumbersome to switch authentication tokens8
- Poor GraphQL support7
- Expensive5
- Can't prompt for per-request variables3
- Not free after 5 users3
- Import curl1
- Import swagger1
- Support websocket1