Top 20 Open Source & Cloud Free Postman Alternatives (2024 Updated)

APIs API Tools Developer APIs API Clients API Testing

Postman Landing Page
1

Postman

The Collaboration Platform for API Development
Pricing:
- Open Source
As the digital landscape evolves, the significance of APIs (Application Programming Interfaces) has surged, facilitating seamless communication between various software applications. Postman has been a leading tool in this space, offering a comprehensive platform for API development, testing, and documentation. However, recent shifts in its pricing model and user experience have prompted many developers to seek good postman alternatives that better suit their needs. This article explores the top 20 open-source and cloud-free alternatives to Postman, starting with APIDog, which stands out for its all-in-one capabilities.

#APIs #Developer APIs #Developer Tools 30 social mentions
Apidog Landing Page

2

Apidog

All-in-One workspace for API Design, Documentation, Debug, Mock, Test

That’s right, APIDog gives you all the features that comes with Postman paid version, at a fraction of the cost. Migration has been so easily that you only need to click a few buttons, and APIDog will do everything for you.

#API #Developer Tool #SaaS
Insomnia REST Landing Page
3

Insomnia REST

Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.
Pricing:
- Open Source
Product Introduction: Insomnia is a powerful open-source API client designed for simplicity and efficiency and works great as a postman alternative. It supports REST, GraphQL, and gRPC, making it versatile for various API types.

#API Tools #API #Developer Tools 129 social mentions
soapUI Landing Page

4

soapUI

SoapUI Pro is one of the most prominent API testing platforms around, allowing developers to quickly prototype the functions of their apps and get them to market with little hassle.

Product Introduction: SoapUI is a robust tool for testing SOAP and REST APIs, known for its extensive testing capabilities, including functional, load, and security testing, which makes it the perfect postman alternative.

#Software Testing #API Tools #Website Testing
Swagger UI Landing Page

5

Swagger UI

Swagger UI is a dependency-free collection of HTML, Javascript, and CSS assets that dynamically generate beautiful documentation from a Swag

Swagger UI is part of the Swagger ecosystem, providing tools for API design and documentation. It allows developers to visualize and interact with APIs effortlessly.

#API Tools #Developer Tools #Documentation 49 social mentions
Hoppscotch Landing Page
6

Hoppscotch

Open source API development ecosystem
Pricing:
- Open Source
- Freemium
- Free Trial
Hoppscotch, formerly known as Postwoman, is a lightweight, open-source API development ecosystem that emphasizes speed and simplicity as a decent postman alternative.

#Web App #Productivity #APIs 90 social mentions
Katalon Landing Page

7

Katalon

Built on the top of Selenium and Appium, Katalon Studio is a free and powerful automated testing tool for web testing, mobile testing, and API testing.

Katalon Studio is an integrated environment for API, web, desktop, and mobile testing. It provides a rich feature set for comprehensive testing.

#Automated Testing #Website Testing #Browser Testing 8 social mentions
HTTPie Landing Page
8

HTTPie

CLI HTTP that will make you smile. JSON support, syntax highlighting, wget-like downloads, extensions, and more.
Pricing:
- Open Source
With the growing demand for effective API testing tools, numerous alternatives to Postman have emerged, each offering unique features tailored to different needs. From comprehensive platforms like APIDog to lightweight solutions like HTTPie and Milkman, there is an option for every developer.

#CLI #Command Line Tools #Curl 51 social mentions
cURL Landing Page
9

cURL

cURL is a computer software project providing a library and command-line tool for transferring data...
Pricing:
- Open Source
cURL is a widely used command-line tool for transferring data with URLs. It supports a multitude of protocols, making it a versatile choice for API testing.

#API Tools #Developer Tools #APIs 121 social mentions
JMeter Landing Page
10

JMeter

Official Twitter account of JMeter, the open source load testing tool by @TheAsf. Code: https://t.co/ADK2A8Pl14. Website: https://t.co/oc0MW2ksea
Pricing:
- Open Source
Apache JMeter is an open-source tool primarily used for performance testing, but it also provides robust capabilities for API testing.

#Development #Monitoring Tools #Website Testing 52 social mentions
Testfully Landing Page
11

Testfully

API Client and API monitoring
Pricing:
- Freemium
- Free Trial
- $49.0 / Monthly
Testfully is a collaborative API testing tool that allows teams to define, share, and test APIs efficiently. It focuses on both cloud and offline capabilities.

#API Testing #API Monitoring #Developer Tools
Thunder Client Landing Page

12

Thunder Client

Rest API client for VS Code, lightweight Postman alternative

#Developer Tools #Tech #APIs
RapidAPI Landing Page

13

RapidAPI

API marketplace for finding and connecting to the world's top APIs.

Not really 100% relatd, but RapidAPI is a marketplace for APIs that also provides tools for testing and managing APIs. It allows developers to connect to thousands of APIs easily.

#API Tools #API Directory #API Discovery 63 social mentions
Restlet Studio Landing Page

14

Restlet Studio

The first browser-based IDE for APIs

#API Tools #Developer Tools #APIs
Assertible Landing Page

15

Assertible

Assertible software provides you with a simple and quick way to monitor your web services. It comes with automated QA tools that users can utilize to test and monitor their web services on different platforms and environments.

#API Tools #APIs #Developer Tools 1 social mentions
Firecamp Landing Page
16

Firecamp

Firecamp is a modern client for Real-time, GraphQL, REST and other 15+ routine tech stacks and platforms.
Pricing:
- Open Source
#Documentation As A Service & Tools #Developer Tools #Documentation 3 social mentions
PostgREST Landing Page

17

PostgREST

Automatic REST API for Any Postgres Database

#Databases #Data Integration #Database Management
usebruno.com

18

Bruno

Bruno is a Git-integrated, fully offline, and open-source API client

#APIs #Developer APIs #API Tools 1 social mentions
TestMace Landing Page

19

TestMace

Powerful IDE to work with API.

#Developer Tools #API Tools #APIs
Karate Landing Page

20

Karate

Web-services testing made simple 🥋

#Website Testing #Browser Testing #Automated Testing 11 social mentions
Milkman Landing Page

21

Milkman

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.

With the growing demand for effective API testing tools, numerous alternatives to Postman have emerged, each offering unique features tailored to different needs. From comprehensive platforms like APIDog to lightweight solutions like HTTPie and Milkman, there is an option for every developer.

#API Tools #Developer Tools #APIs 5 social mentions