Postman Alternatives Filtered by 'Web Development'

The best alternative to Postman is Insomnia REST Client, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Postman and 13 are so hopefully you can find a suitable replacement. Other interesting alternatives to Postman are Insomnium, Reqable, TestMace and Milkman.

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Insomnia REST Client
147 likes
A powerful REST API Client with cookie management, environment variables, code generation, and authentication for Mac, Window, and Linux.
106 Insomnia REST Client alternatives
Cost / License
Freemium
Open Source (Apache-2.0)
Application typeApplication types
API Client
HTTP Client
Origin
United States
Platforms
Mac
Windows
Linux
Flathub
Flatpak
United States
+2
Good alternative?Is Insomnia REST Client a good alternative to Postman?

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20comments
Insomnia REST Client vs Postman Comments
Top Positive Comment by dax0 · Aug 26, 2023
Very similar to Postman, but doesn't require logging in for basic features. So useful for some quick testing.
Top Negative Comment by Guest · Aug 28, 2021
It's not lightweight, because still uses Electron and not native, so consuming memory alot
Negative comment by AdinanCenci · Feb 11, 2025
used to like it, now it is as garbage as postman
3 of 20 comments
Insomnia REST Client is Freemium and Open SourcePostman is Freemium and Proprietary
Insomnia REST Client is LightweightPostman is not according to our users
Insomnium
18 likes
Insomnium is a fast local API testing tool that is privacy-focused and 100% local. For testing GraphQL, REST, WebSockets and gRPC. This is a fork of Kong/insomnia.
Cost / License
Free
Open Source (MIT)
Application typeApplication types
API Client
HTTP Client
Origin
International
Alerts
Discontinued
Platforms
Mac
Windows
Linux
Global
Good alternative?Is Insomnium a good alternative to Postman?
Reqable
5 likes
Reqable is a modern cross-platform project, designed for API development, testing, and debugging. Reqable fully supports HTTP1 and HTTP2 and partially supports HTTP3(QUIC).
Cost / License
Freemium
Proprietary
Application typeApplication types
API Client
HTTP Client
Platforms
Mac
Windows
Linux
Android
iPhone
Android Tablet
iPad
Flathub
Flatpak
+9
Good alternative?Is Reqable a good alternative to Postman?
TestMace
7 likes
Powerful IDE to work with API. Harness the power of scenarios, autocompletion and syntax highlight for API development. Write tests, share code without leaving the comfortable development environment.
Cost / License
Freemium
Proprietary
Application type
API Client
Origin
United States
Platforms
Mac
Windows
Linux
United States
+1
Good alternative?Is TestMace a good alternative to Postman?
Milkman
1 like
Milkman is a JavaFx-based workbench for crafting requests / responses. It is not limited to e.g. http (or more specifically rest) requests but can be extended in any imaginable way. It is optimized for fast startup and efficient workflow.
Cost / License
Free
Open Source (MIT)
Application type
HTTP Client
Origin
United States
Platforms
Mac
Windows
Linux
United States
Good alternative?Is Milkman a good alternative to Postman?
EchoAPI
Like
EchoAPI is an all-in-one API development collaboration platform that offers essential features like API debugging, design, automated testing, stress testing, and documentation generation.
Cost / License
Freemium
Proprietary
Origin
United Kingdom
Platforms
Mac
Windows
Linux
Online
Google Chrome
Visual Studio Code
IntelliJ IDEA
Good alternative?Is EchoAPI a good alternative to Postman?
Gotcha Rest Client
1 like
Gotcha HTTP Client is a lightweight http client that allows you to make requests and inspect responses.
Cost / License
Paid
Proprietary
Application typeApplication types
HTTP Client
API Client
Platforms
Mac
+4
Good alternative?Is Gotcha Rest Client a good alternative to Postman?
Assertible
5 likes
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.
Cost / License
Freemium
Proprietary
Application typeApplication types
HTTP Client
Uptime Monitor
Origin
United States
Platforms
Mac
Windows
Linux
Online
United States
+3
Good alternative?Is Assertible a good alternative to Postman?
R
R
restclient.el
2 likes
This is a tool to manually explore and test HTTP REST webservices. Runs queries from a plain-text query sheet, displays results as a pretty-printed XML, JSON and even images.
Cost / License
Free
Open Source
Application typeApplication types
HTTP Client
API Client
Alerts
Discontinued
Platforms
Mac
Windows
Linux
GNU Emacs
R
Good alternative?Is restclient.el a good alternative to Postman?
FRequest
1 like
FRequest is a fast, lightweight and opensource Windows / macOS / Linux desktop program to make HTTP(s) requests (e.g. call REST apis).
Cost / License
Free
Open Source (GPL-3.0)
Application type
HTTP Client
Alerts
Discontinued
Platforms
Mac
Windows
Linux
+3
Good alternative?Is FRequest a good alternative to Postman?

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1comment
Discontinued
The latest version (1.2a) was released in March 2022.
FRequest vs Postman Comments
Positive comment by KaKi87 · Oct 26, 2020
Free and open source multiplatform non-Electron app with dark theme.
1 of 1 comments
FRequest is Free and Open SourcePostman is Freemium and Proprietary
FRequest is an HTTP Client Postman is an API Client
Restretto
1 like
Minimal native and free REST API client for Mac.
Cost / License
Free
Proprietary
Application typeApplication types
API Client
HTTP Client
Platforms
Mac
Good alternative?Is Restretto a good alternative to Postman?
Atrahasis
Like
Api client and Development Platform.
Cost / License
Freemium
Proprietary
Application typeApplication types
API Client
HTTP Client
Origin
International
Platforms
Windows
Mac
Linux
Global
+4
Good alternative?Is Atrahasis a good alternative to Postman?

12 of 13 Postman alternatives