
Description: Mongrel is a fast HTTP 1.1 web server library written in Ruby for the Ruby on Rails and Sinatra web frameworks. It is light, easy to install and configure, and good for development and testing environments.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: WEBrick is a lightweight HTTP server library that is bundled with Ruby. It enables developers to easily create HTTP servers in Ruby for testing, prototyping, and development.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API