
Description: XUnit is an open-source unit testing framework for the .NET Framework and .NET Core. It allows writing tests to verify pieces of your code work as expected.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: NUnit is an open source unit testing framework for .NET languages. It allows developers to write and execute repeatable tests to ensure code works as expected.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API