Top 12 Open-Source Alternatives to API Tester

API Tester

API Tester is the first mobile app to test any type of API on the go. Including REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, HTTPS.

Product categories

API API Tools APIs Automated Testing Blogging Blogging Platform Browser Testing Business Workflows CMS Code Analysis Data Integration Developer Tools

Summary

The top open-source alternatives to API Tester are Postman, Insomnia REST, and Hoppscotch. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Postman Landing Page
1

Postman

The Collaboration Platform for API Development
Pricing:
- Open Source
#APIs #API Tools #Developer Tools 27 social mentions
Insomnia REST Landing Page
2

Insomnia REST

The most intuitive cross-platform REST API Client ð´
Pricing:
- Open Source
#API Tools #API #Developer Tools 120 social mentions
Hoppscotch Landing Page
3

Hoppscotch

Open source API development ecosystem
Pricing:
- Open Source
- Freemium
- Free Trial
#Web App #Productivity #APIs 77 social mentions
Webhook.site Landing Page
4

Webhook.site

Instantly generate a free, unique URL and email address to test, inspect, and automate (with a visual workflow editor and scripts) incoming HTTP requests and emails.
Pricing:
- Open Source
- Freemium
- $14.0 / Monthly
#Developer Tools #APIs #Sales Workflow 68 social mentions
Axe API Landing Page
5

Axe API

The next-generation Rest API framework.
Pricing:
- Open Source
#API Tools #APIs #Developer Tools
Selenium Landing Page
6

Selenium

Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.
Pricing:
- Open Source
#Testing #Browser Testing #Automated Testing 8 social mentions
Step CI Landing Page
7

Step CI

API Testing and Monitoring made simple
Pricing:
- Open Source
#API #Developer Tool #Testing Tool 8 social mentions
Strapi Landing Page
8

Strapi

Strapi is the most advanced Node.
Pricing:
- Open Source
#CMS #Blogging #Blogging Platform 310 social mentions
Proxyman.io Landing Page
9

Proxyman.io

Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Pricing:
- Open Source
- $49.0 / Annually
#Developer Tools #Debugging #Proxy 24 social mentions
req Landing Page
10

req

A minimal yet powerful HTTP client/API testing tool.
Pricing:
- Open Source
#API Tools #APIs #Developer Tools
Bearer Landing Page
11

Bearer

Bearer is an open source, fast and accurate static application security testing (SAST) tool that analyze your source code to discover, filter and prioritize security and privacy risks.
Pricing:
- Open Source
- Freemium
- Free Trial
#Code Analysis #Security & Privacy #Security
Restfox.dev Landing Page
12

R

Restfox.dev

Browser based HTTP client inspired by Insomnia and Postman
Pricing:
- Open Source
#Developer Tools #HTTP #API Tools 5 social mentions