
Description: Tsung is an open-source multi-protocol distributed load testing tool. It is designed to test the performance of web servers, application servers, and other types of network-based software by simulating a heavy load on the target system.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: AppPerfect Load Test is a load and performance testing tool for web and mobile applications. It allows you to simulate hundreds or thousands of concurrent users to test application performance and behavior under load. Useful for capacity planning, scalability testing, and identifying bottlenecks.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API