The Best Open Source Postman AlternativesTop API & HTTP Clients like Postman

The best open source alternative to Postman is Insomnia REST Client. If that doesn't suit you, our users have ranked more than 50 alternatives to Postman and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Postman are Hoppscotch, HTTPie for Terminal, Advanced REST Client and soapUI.

Postman alternatives are mainly API Clients but may also be HTTP Clients or HTTP(S) Debuggers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Postman.

165

Freemium • Proprietary
API Client

Postman is a tool that facilitates the development and use of APIs. Postman provides all the functionality needed to create...

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Insomnia REST Client
Is this is a good alternative?
Yes
No
Freemium • Open Source
API Client
HTTP Client
Mac
Windows
Linux
55 Insomnia REST Client alternatives
A powerful REST API Client with cookie management, environment variables, code generation, and authentication for Mac, Window, and Linux.
- - Insomnia REST Client is the most popular Windows, Mac & Linux alternative to Postman.
- - Insomnia REST Client is the most popular Open Source & free alternative to Postman.
Suggest and vote on features
Insomnia REST Client Features
1. LightweightInsomnia REST Client consumes less device resources compared to similar apps.
2. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
Request Chaining
Import Curl commands
REST API
GraphQL
REST Client
API Management
Separated workspaces
Support environment variables
SSL client certificates
Image Preview
Comments about Insomnia REST Client as a Alternative to Postman
Almost everyone thinks Insomnia REST Client is a great Postman alternative.
all • positive • negative relevance • date
Julian Garner
Compared to postman this is definitely better the UI is less cluttered there's Linux support, and it just looks nicer.
Top positive comment •
3

Guest
More ligtweight, straightforward and intuitive.
Top positive comment •
12

Guest
It's not lightweight, because still uses Electron and not native, so consuming memory alot
Top negative comment •
7

dax0
Very similar to Postman, but doesn't require logging in for basic features. So useful for some quick testing.
Positive comment •
0

scottfrost
Many of the same features as Postman, but no sync unless you pay. This is a deal breaker to developers who work on multiple computers, like home & work PCs.
Negative comment •
-5

Show more comments ▾
5 of 19 comments
Hoppscotch
Is this is a good alternative?
Yes
No
Free • Open Source
API Client
HTTP Client
Online
Self-Hosted
54 Hoppscotch alternatives
Hoppscotch is an open-source API development ecosystem. It helps you create your requests faster, saving you precious time on your development.
- - Hoppscotch is the most popular Web-based & Self-Hosted alternative to Postman.
Suggest and vote on features
Hoppscotch Features
1. Ad-freeHoppscotch doesn't contain any form of external advertising.
2. Command line interfaceHoppscotch either have CLI support or is a CLI-only app.
3. LightweightHoppscotch consumes less device resources compared to similar apps.
4. PortableHoppscotch can be used from a USB stick or similar with no prior installation.
REST API
Websocket streams
GraphQL API
Cross browser testing
Browser-based
Comments about Hoppscotch as a Alternative to Postman
Most users think Hoppscotch is a great Postman alternative.
Guest
Helps you create your requests faster, saving you precious time on your development
Positive comment •
3

Guest
fully web based interface
Positive comment •
0
HTTPie for Terminal
Is this is a good alternative?
Yes
No
Free • Open Source
API Client
HTTP Client
Mac
Windows
Linux
Python
FreeBSD
28 HTTPie for Terminal alternatives
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...
Suggest and vote on features
HTTPie for Terminal Features
1. Command line interfaceHTTPie for Terminal either have CLI support or is a CLI-only app.
REST API
API Management
Web Testing
Comments about HTTPie for Terminal as a Alternative to Postman
Most users think HTTPie for Terminal is a great Postman alternative.
scottfrost
Update to the (only) negative comment. The UI is now free (price) but closed source.
Positive comment •
1

Leonardo Colman
HTTPie doesn't contain an interface. The current UI is closed behind a private beta.
Negative comment •
-1
Advanced REST Client
Is this is a good alternative?
Yes
No
Free • Open Source
API Client
HTTP Client
Mac
Windows
Linux
Chrome OS
AppImageHub
Google Chrome
Chromium
56 Advanced REST Client alternatives
API testing tool. Which allows web developers to create and test custom HTTP requests.
Suggest and vote on features
Advanced REST Client Features
Full headers control
Electron based
Web tool
REST API
Sync with Google Drive
REST Client
API Testing
Comments about Advanced REST Client as a Alternative to Postman
Most users think Advanced REST Client is a great Postman alternative.
patheticcockroach
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)
Positive comment •
2

blur HY
It has all features postman has, and it's modern
Positive comment •
3

Guest
The import request are so bad
Negative comment •
0
soapUI
Is this is a good alternative?
Yes
No
Free • Open Source
API Client
HTTP Client
Mac
Windows
Linux
64 soapUI alternatives
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 compl.
Suggest and vote on features
soapUI Features
Intuitive Nodes
Comments about soapUI as a Alternative to Postman
Most users think soapUI is a great Postman alternative.
DiskCrasher
Can create a mock server for free.
Positive comment •
0
Bruno
Is this is a good alternative?
Yes
No
Free • Open Source
HTTP Client
API Client
Linux
Mac
Windows
11 Bruno alternatives
Bruno is a new and innovative open source API client, aimed at revolutionizing the status quo represented by Postman, Insomnia and similar tools out there.
Suggest and vote on features
Bruno Features
1. LightweightBruno consumes less device resources compared to similar apps.
2. Works OfflineBruno can be used without the need to connect to the internet.
3. Git SupportBruno supports Git, a free and open source distributed version control system.
4. Command line interfaceBruno either have CLI support or is a CLI-only app.
REST API
Comments about Bruno as a Alternative to Postman
pros, cons and recent comments
Guest
Postman shut off his local client and forces you now to store your data in their cloud, also running your requests through their proxy.

It also is quite a mess to colaborate on postman colections, if you don't want to use / pay for their cloud.

With Bruno all that is not an issue at all - they work in a way which comes very natural to a developer and you can perfectly integrate your api test collections to your code repository.
Positive comment •
0
xh
Is this is a good alternative?
Yes
No
Free • Open Source
API Client
HTTP Client
Download Manager
Mac
Windows
Linux
BSD
21 xh alternatives
xh is a friendly and fast tool for sending HTTP requests. It reimplements as much as possible of HTTPie's excellent design, with a focus on improved performance.
Suggest and vote on features
xh Features
1. Command line interfacexh either have CLI support or is a CLI-only app.
2. Lightweightxh consumes less device resources compared to similar apps.
REST Client
Web Testing
REST API
Support for Unicode
Data transfer

7 of 37 Postman alternatives

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