
Description: Locust is an open source load and performance testing tool written in Python. It allows developers to test the performance of their web applications by simulating large numbers of concurrent users making requests.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Siege is an open source load testing and benchmarking utility for web applications. It allows developers to put load on a web server to test application stability and performance under heavy load.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API