Best Postman Alternatives: 18 open source API / REST Development tools

Postman is a great tool but it might not fit everyone. Since it's a tool for developers you can be sure there are many other similar tools that do stuff a little bit different. So whatever the reason is that you want to replace Postman check the list below. Thousands of other users has provided their opinion about what they like the most.

The list of alternatives was last updated: 3/6/2020 12:43:00 PM
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Alternatives to Postman for all platforms with Open Source License

  • Insomnia REST Client

    Debug APIs like a human, not a robot. Insomnia is a simple yet powerful REST API Client with cookie management, environment variables, code generation, and authentication for Mac, Window, and Linux.

    • Full featured, open source, freemium nassyma • Aug 2020 • 1 agrees and 0 disagrees Disagree   Agree
    • Cleaner interface compared to Postman Guest • Apr 2019 • 17 agrees and 4 disagrees Disagree   Agree
    • Found it really useful and fast, thanks! davidmiller1990x • Aug 2020 Disagree   Agree
    • More ligtweight, straightforward and intuitive. Guest • Jul 2019 • 13 agrees and 1 disagrees Disagree   Agree
    • Have very usefule api call history, and clean interface, and lightweight Guest • Apr 2020 • 1 agrees and 0 disagrees Disagree   Agree
    • Easy to use. better and simpler interface. Guest • Feb 2019 • 10 agrees and 4 disagrees Disagree   Agree
    • Creating new request was easy. I loved the feature to Generate client code from the request. yogidevendra • Jan 2020 Disagree   Agree
    • there is no way of collaborating with team. Guest • Dec 2019 • 0 agrees and 2 disagrees Disagree   Agree
    • Same basic features but so much lighter theSlyest • Oct 2019 Disagree   Agree
    • Better UI, request chaining, environment variables, built-in GraphQL and JSON editing Guest • Oct 2019 Disagree   Agree
    • Insomnia use much less storage than Postman. daominah1 • Apr 2019 Disagree   Agree
    • The features are almost the same with postman. Guest • Aug 2017 • 10 agrees and 5 disagrees Disagree   Agree
    • Very Light and Fast. Really recommended sekti92 • Sep 2016 • 5 agrees and 1 disagrees Disagree   Agree
    • Very easy to use. Clean interface. Guest • Mar 2017 • 4 agrees and 1 disagrees Disagree   Agree
    • Request chaining, test scripting and setting up environment variables are still in an experimental stage. Postman offers these features out of the box in a well designed and elegant way. Guest • Oct 2017 • 1 agrees and 11 disagrees Disagree   Agree

    Freemium $ $ $ Open Source Mac Windows Linux

    Lightweight GraphQL Request Chaining Responsive design ... Separated workspaces Support environment variables API Management Cloud sync Code generation Configurable request timeout Electron based GraphQL integration Import Curl commands Support for Keyboard Shortcuts Image Preview REST API SSL client certificates SVG Editors Variables Add a feature

    Insomnia REST Client icon
    Reuse common variables like API keys using environments. Define them globally or switch between sub-environments for a seamless development/production workflow.
    Specify URL, payload, headers, and authorization all in one place. Then just hit send.
    Change the color scheme.
    Generate code snippets for over thirty different language libraries, like NodeJS, Go, Swift, Python, Java, C, and others.
    Easily view and manage cookies in a simple yet powerful interface. Cookies are automatically stored and sent with every request, just as you would expect.

  • soapUI

    Eviware, the maker of soapUI, Web Service Testing Leader soapUI is a tool for functional testing, mainly of web services like SOAP based web services and RESTful web services, but also HTTP based services and JMS Services as well as databases. soapUI is an open source and completely free tool with a commercial companion, soapUI Pro, with extra functionality for companies with mission critical web services.

    Free Open Source Mac Windows Linux

    Intuitive Nodes Add a feature

    soapUI icon

  • HTTPie

    HTTPie (pronounced aitch-tee-tee-pie) is a command line HTTP client. Its goal is to make CLI interaction with web services as human-friendly as possible. It provides a simple http command that allows for sending arbitrary HTTP requests using a simple and natural syntax, and displays colorized output. HTTPie can be used for testing, debugging, and generally interacting with HTTP servers.

    Free Open Source Mac Windows Linux

    Command line interface Web Testing Add a feature

    HTTPie icon

  • Hoppscotch

    Hoppscotch is an open-source API request builder. It helps you create your requests faster, saving you precious time on your development. Features ? ?? Lightweight: Crafted with minimalistic UI design. ?? Fast: Send requests and get/copy responses in real-time. Methods: GET, HEAD, POST, PUT, DELETE, CONNECT, OPTIONS, TRACE, PATCH, <custom> (ie. LIST) 🌈 Make it yours: Customizable combinations for background, foreground and accent colors.

    • Helps you create your requests faster, saving you precious time on your development Guest • Oct 2019 • 2 agrees and 0 disagrees Disagree   Agree

    Free Open Source Web Self-Hosted

    Ad-free Cross browser testing Websocket streams Cross-platform ... GraphQL API REST API Add a feature

    Hoppscotch icon

  • Advanced REST Client (ARC)

    Cross platform API testing Use ARC on any major platforms including Windows, MacOS and Linux. Simplicity Easy and clean user inteface helps you make test request faster. Works with Google Drive Store your requests and projects on Google Drive and share it with your team. More data then other tools ARC implements it’s own HTTP client that works directly on a socket. As a result you receive detailed information about request timings, redirects and even sent HTTP message body.

    • Better features than Postman for my use case: I need full control over the headers, including the ability to remove them all, something which Postman doesn't allow to do (they add tons of junk headers) patheticcockroach • Dec 2019 • 1 agrees and 0 disagrees Disagree   Agree
    • It has all features postman has, and it's modern blurHY • Sep 2019 • 2 agrees and 1 disagrees Disagree   Agree

    Free Open Source Mac Windows Linux Chrome OS Chrome ... Chromium Chrome Web Store

    Full headers control Web tool Electron based REST API Add a feature

    Advanced REST Client (ARC) icon

  • RESTClient

    RESTClient can be used to test variety of HTTP communications and RESTful webservices. Friendly GUI, rich functionalities.

    Free Open Source Mac Windows Linux

    No features added Add a feature

    RESTClient icon

  • HttpRequester

    HttpRequester is a tool for Firefox for easily making HTTP requests (GET/PUT/POST/DELETE), viewing the responses, and keeping a history of transactions. This tool is useful when doing web or REST development, or when you need to make HTTP requests that are not easily done via the browser (PUT/POST/DELETE).

    Free Open Source Mac Windows Linux Firefox

    Debugger Firefox Extensions REST API Add a feature

    HttpRequester icon

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  • HTTP Toolkit

    HTTP Toolkit is a beautiful, cross-platform & open-source HTTP(S) debugging proxy, analyzer & client, with built-in support for modern tools from Docker to Android to GraphQL. Setup with one click to start seeing exactly what your code is sending. Diff requests or responses, and explore overall metrics, to understand in depth. Change live traffic content, and simulate errors or performance problems to test your system.

    Freemium Open Source Mac Windows Linux Web

    Built in docs HTTP mocking One click interception OpenAPI integration ... Performance analysis Themes Debugger Proxy Add a feature

    HTTP Toolkit icon

  • apiman

    apiman is an open source API management layer that streamlines repetitive tasks often required when providing an API, such as implementing security, throttling and billing.

    Free Open Source Mac Windows Linux Web Self-Hosted

    API Management Add a feature

    apiman icon
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