Locust

locust.io

An open source load testing tool for millions of simultaneous users.

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Locust screenshot
/ About /

Locust is an open-source load testing framework that lets developers define user behavior using Python code to simulate millions of concurrent users hitting a system. It supports complex scenarios through TaskSets and offers both self-hosted and cloud-hosted options. The tool is designed for scalable, scriptable performance and stress testing of web applications.

/ How it works /

Users write Python classes defining user behavior and tasks, then Locust spawns swarms of simulated users that execute those tasks against the target system.

/ Who it's for /

software developers and QA engineers

/ More info /

Background.

Status
launched
Business model
open-source
/ Discovered patterns /

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