Locust

Open-source Python-based distributed load testing tool for HTTP services

Developer ToolsFree

Locust is an open-source, distributed load testing framework written in Python that defines user behavior as Python code, enabling complex, realistic test scenarios with conditional logic, data-driven requests, and dynamic payloads beyond what YAML configuration allows. Its web UI monitors test progress in real time, and its distributed mode coordinates multiple machines to generate millions of concurrent requests. Python development teams and QA engineers who need programmable load test scenarios for complex HTTP services choose Locust for its code-first approach, flexibility, and scriptable setup.

Key Features

• ✓Python scripting
• ✓Distributed load
• ✓Real-time UI
• ✓HTTP testing
• ✓Programmable scenarios