
Description: Apache Benchmark (ab) is an open-source tool for benchmarking the performance of HTTP web servers. It allows users to measure response times, requests per second, and other metrics to test a server's load capacity and performance under different conditions.
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