This is a repackaged open source software product wherein additional charges apply for support. Locust is a scalable and flexible load testing tool for evaluating the performance of web applications. It allows users to define user behavior with Python code, making it highly customizable. Locust distributed nature enables testing large user loads by distributing tests across multiple machines. The tool provides a web based user interface for monitoring and controlling tests, making it user-friendly and easy to analyze performance metrics.