Postman AlternativesOnly Open Source apps categorised as API Clients & HTTP(S) Debuggers

If that doesn't work for you, our users have ranked more than 50 alternatives to Postman, but unfortunately only zero of them are open source API Clients. If you can't find an alternative you can try to remove all filters.

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Postman alternatives are mainly API Clients but may also be HTTP Clients or HTTP(S) Debuggers.  Filter by these or use the filter bar below if you want a narrower list of alternatives or looking for a specific functionality of Postman.
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Postman is a tool that facilitates the development and use of APIs. Postman provides all the functionality needed to create or simulate API specifications and use the Postman Collection Runner to create tests.

More about Postman
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Postman alternatives page was last updated Sep 12, 2024
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  1. Hoppscotch icon
    Hoppscotch icon

    Hoppscotch

     39 likes
    Copy a direct link to this comment to your clipboard

    Hoppscotch is an open-source API development ecosystem. It helps you create your requests faster, saving you precious time on your development.

    63 Hoppscotch alternatives
    Hoppscotch screenshot 1

    License model

    • Free • Open Source

    Application types

    Platforms

    • Online
    • Self-Hosted
    Hoppscotch screenshot 1
    Hoppscotch screenshot 2

    Properties

    1.  Ad-free
    2.  Lightweight

    Features

    1.  REST API
    2.  GraphQL API
    3.  Websocket streams
    4.  Command line interface
    5.  Portable
    6.  Cross browser testing
    Hoppscotch iconPostman Icon

    Hoppscotch VS Postman

    Is Hoppscotch a good alternative to Postman?
     
    Comments about Hoppscotch as an Alternative to Postman
     
    Max Fisher

    AFAIK, doesn't have a feature to import cURL from clipboard.

    Negative comment •Sep 12, 2024
    0
    Guest

    Helps you create your requests faster, saving you precious time on your development

    Positive comment •Oct 29, 2019
    3
    Postman Icon
    Hoppscotch icon

    • Most users think Hoppscotch is a great Postman alternative.

    • Hoppscotch is the most popular Web-based & Self-Hosted alternative to Postman.

    • Hoppscotch is Free and Open SourcePostman is Freemium and Proprietary
    • Hoppscotch is LightweightPostman is not according to our users
  2. Requestly icon
    Requestly icon

    Requestly

     28 likes
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    Requestly is a lightweight proxy available as a browser extension & desktop app to intercept & modify network requests. Using Requestly you can Modify Headers, Redirect Url, Mock API response, Delay/Throttle requests, etc.

    27 Requestly alternatives
    Modify HTTP Headers

    License model

    • Freemium • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Microsoft Edge
    • Google Chrome
    • Software as a Service (SaaS)
    • Selenium
    • Firefox
    Redirect URL
    Inject Custom JS/CSS
    +1
    Mock HTTP Response & API Endpoints

    Properties

    1.  Lightweight
    2.  Ad-free

    Features

    1.  Intercepting HTTP calls
    2.  Requests monitoring
    3.  Bug reporting
    4.  Web page Debugging
    5.  One click interception
    6.  Android Development
    7.  Dark Mode
    8.  Real time collaboration
    9.  No Coding Required
    10.  Command line interface
    11.  Traffic Monitoring
    12.  Desktop Application
    Requestly iconPostman Icon

    Requestly VS Postman

    Is Requestly a good alternative to Postman?
     

    • Requestly is the most popular SaaS alternative to Postman.

    • Requestly is Freemium and Open SourcePostman is Freemium and Proprietary
    • Requestly is LightweightPostman is not according to our users
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