Free Postman Alternatives

The best free alternative to Postman is Insomnia REST Client, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Postman and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Postman are HTTPie for Terminal, Hoppscotch, RapidAPI for Mac and soapUI.

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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.
Postman iconPostman
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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
More about Postman
Postman alternatives page was last updated Feb 15, 2023
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  1. API Test Base icon
    API Test Base icon

    API Test Base

     1 like
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    API test automation tool that has GUI, supports HTTP stubs (mock services), data driven testing, and API types beyond HTTP, such as relational database, JMS, FTP(s), AMQP, MQTT, etc.

    36 API Test Base alternatives
    API Test Base screenshot 1

    License model

    • Free • Proprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Docker

    Properties

    1.  Lightweight

    Features

    1.  Ad-free
    2.  API Testing
    3.  REST Client
    4.  Software Testing Tool
    5.  Database Testing
    6.  HTTP Testing
    API Test Base iconPostman Icon

    API Test Base VS Postman

    Is API Test Base a good alternative to Postman?
     
  2. HttpMaster icon
    HttpMaster icon

    HttpMaster

     7 likes
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    Practical and easy-to-use software tool for testing HTTP applications and services.

    53 HttpMaster alternatives
    Main window

    License model

    • Freemium • Proprietary

    Application types

    Platforms

    • Windows
    Request item properties
    Parameter definition
    +7
    Validation definition

    Properties

    1.  Lightweight

    Features

    1.  Command line interface
    2.  Request Chaining
    3.  Website testing
    4.  REST API
    HttpMaster iconPostman Icon

    HttpMaster VS Postman

    Is HttpMaster a good alternative to Postman?
     
  4. Nightingale REST Client icon
    Nightingale REST Client icon

    Nightingale REST Client

     4 likes
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    A modern, resource-friendly REST client for Windows.

    27 Nightingale REST Client alternatives
    Nightingale REST Client screenshot 1

    License model

    • Free • Proprietary

    Application types

    Platforms

    • Windows
    Nightingale REST Client screenshot 1
    Nightingale REST Client screenshot 2
    +5
    Nightingale REST Client screenshot 3

    Nightingale REST Client Features

    1.  REST API
    2.  OAUTH
    3.  Tabbed interface
    4.  C-sharp
    5.  REST Client
    Nightingale REST Client iconPostman Icon

    Nightingale REST Client VS Postman

    Is this a good alternative to Postman?
     
    Comments about Nightingale REST Client as an Alternative to Postman
     
    Guest

    Nightingale is super fast and simple to use. It's highly optimized for Windows 10

    Positive comment •Dec 19, 2018
    1
    Guest

    It's faster, more stable, and the UI is more intuitive.

    Positive comment •Nov 21, 2020
    0
    Joe Bell

    It's faster than Postman and it uses less resources.

    Positive comment •Dec 18, 2018
    0
    Postman Icon
    Nightingale REST Client icon
    • Nightingale REST Client is Free and ProprietaryPostman is Freemium and Proprietary
  5. Lama2 icon
    Lama2 icon

    Lama2

     2 likes
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    Lama2 defines the human-friendly l2 syntax and CLI for describing and executing APIs. Store your APIs in plain-text files. Collaborate with team using version control (say, git). Run Lama2 directly from VSCode extension. Think of Lama2 as Markdown for APIs.

    56 Lama2 alternatives
    Lama2 screenshot 1

    License model

    • Free • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    Lama2 screenshot 1

    Properties

    1.  Lightweight

    Features

    1.  Command line interface
    2.  Portable
    3.  VSCode
    4.  Plain text file
    5.  Suggests DSL format
    6.  Code generation
    7.  Extensibility
    8.  Request Chaining
    Lama2 iconPostman Icon

    Lama2 VS Postman

    Is Lama2 a good alternative to Postman?
     
  6. Apiman icon
    Apiman icon

    Apiman

     4 likes
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    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.

    27 Apiman alternatives

    License model

    • Free • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Self-Hosted

    Apiman Features

    1.  API Management
    Apiman iconPostman Icon

    Apiman VS Postman

    Is Apiman a good alternative to Postman?
     
  7. Assertible icon
    Assertible icon

    Assertible

     5 likes
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    Assertible is the easiest way to test and monitor your APIs and helps reduce bugs in web apps by providing tools to continuously validate endpoints and responses with a flexible interface to run your tests any time and place.

    53 Assertible alternatives
    Assertible screenshot 1

    License model

    • Freemium • Proprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    Built-in health dashboard to visualize the status of your APIs.
    Keep track of all critical test cases in place, and easily create and update tests.
    +3
    Integrate with tools like GitHub, Slack, and Zapier, to do cool things with your test results.

    Assertible Features

    1.  Regression testing
    2. Slack icon  Slack integration
    3. Zapier icon  Zapier integration
    4.  REST API
    5.  Performance Monitoring
    Assertible iconPostman Icon

    Assertible VS Postman

    Is Assertible a good alternative to Postman?
     
  9. FRequest icon
    FRequest icon

    FRequest

     1 like
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    FRequest is a fast, lightweight and opensource Windows / macOS / Linux desktop program to make HTTP(s) requests (e.g. call REST apis).

    32 FRequest alternatives
    Windows

    License model

    • Free • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    macOS
    Linux
    +3
    Dark Theme

    FRequest Features

    1.  Portable
    2.  REST API
    3.  API Management
    4.  HTTP Proxy
    5.  Configurable request timeout
    FRequest iconPostman Icon

    FRequest VS Postman

    Is FRequest a good alternative to Postman?
     
    Comments about FRequest as an Alternative to Postman
     
    KaKi87

    Free and open source multiplatform non-Electron app with dark theme.

    Positive comment •Oct 26, 2020
    0
    Postman Icon
    FRequest icon
    • FRequest is Free and Open SourcePostman is Freemium and Proprietary
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