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Postman
The API platform used by 30 million developers — GUI testing, automated collections, mock servers, API documentation.
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About Postman
Postman is the most widely used API testing and collaboration platform — 30 million developers use it to design, test, document, and mock APIs.
Postman vs alternatives: Postman Free allows 3 active flows, Hoppscotch Free allows unlimited, Insomnia Free is local only. Collaboration on Postman supports 3 users free vs Hoppscotch''s 3 members. Mock servers and API documentation are unique to Postman at the free tier. Desktop app size is 400-600 MB for Postman vs browser-based 2 MB for Hoppscotch.
Postman''s collection runner executes all requests in a collection sequentially, with test scripts written in JavaScript with Chai-style assertions. Newman (Postman CLI) runs collections in CI/CD pipelines: `newman run my-api.json --environment production.json`.
Mock servers: create a mock server from any collection in 30 seconds. Postman generates realistic example responses from your saved response examples. Teams use mock servers to develop frontend and backend in parallel before the API is built.
Free tier restriction (2023): Postman reduced the free tier significantly in 2023 — collections are now limited to 3 active flows. Many developers have switched to Hoppscotch or Bruno (open-source) as a result.
Key Features
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Collections: group API requests with shared environments, variables, and test scripts
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Newman CLI: run collections headlessly in CI/CD with JSON or JUnit test output
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Mock servers: generate responses from saved examples without a live API
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Pre-request scripts: JavaScript that runs before each request for authentication
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Monitors: scheduled collection runs that alert you when APIs break or slow down
Pros
- ✓30 million developers — every API tutorial and example uses Postman, universal recognition
- ✓Mock servers: generate realistic API responses from examples in 30 seconds
- ✓Newman CLI: run Postman collections in any CI/CD pipeline without code changes
- ✓API documentation auto-generated from collections with one click
- ✓Collaboration workspaces: share collections, environments, and documentation with your team
Cons
- ✗Free tier severely restricted in 2023 — 3 active flows and 3 users maximum
- ✗400-600 MB desktop app is the heaviest API client available
- ✗Self-hosted option not available — all data goes through Postman''s cloud
Who is using Postman?
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Backend developers building REST APIs who want a GUI for testing during development
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Teams who need to share API collections and documentation across frontend and backend
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QA engineers who use Postman collections for automated API regression testing
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Product teams who need mock servers to develop frontend before the API is complete
Use Cases
- →Testing a REST API during development with saved environments for local, staging, and production
- →Running automated API tests in GitHub Actions with Newman and a Postman collection
- →Generating API documentation from a collection and sharing it with frontend developers
- →Creating a mock server so the frontend team can develop against a realistic API response
Pricing
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Free : $0/mo — 3 active flows, 3 users, Mock servers, API documentation
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Basic : $14/user/mo — Unlimited flows, Unlimited users, 5 monitors, Priority support
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Professional : $29/user/mo — Advanced mocking, 25 monitors, SSO, Audit logs
Pricing details may not be up to date. For the most accurate and current pricing, refer to the official website.
What Makes Postman Unique?
The API platform with the largest ecosystem — mock servers, Newman CLI, auto-generated documentation, and 30 million developers who recognize Postman collections as the universal format for API sharing.
How We Rated It
User count from Postman State of the API Report 2024. Free tier comparison from published documentation July 2025. Newman CLI tested with a 50-request collection in GitHub Actions.
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Accuracy and Reliability 4.5/5
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Ease of Use 4.6/5
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Functionality and Features 4.5/5
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Performance and Speed 4.4/5
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Customer Support 4.3/5
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Value for Money 3.9/5
AI summary
The API platform used by 30 million developers — GUI testing, automated collections, mock servers, API documentation.