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Define user behaviour with Python code, and swarm your system with millions of simultaneous users
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What is Locust?

Locust is an easy-to-use, distributed, user load testing tool. Intended for load testing web sites (or other systems) and figuring out how many concurrent users a system can handle.
Locust is a tool in the Load and Performance Testing category of a tech stack.
Locust is an open source tool with 12.8K GitHub stars and 1.8K GitHub forks. Here’s a link to Locust's open source repository on GitHub

Who uses Locust?

21 companies reportedly use Locust in their tech stacks, including Craftbase, Doubtnut, and DAILYHOTEL.

55 developers on StackShare have stated that they use Locust.

Locust Integrations

Why developers like Locust?

Here’s a list of reasons why companies and developers use Locust

Locust's Features

  • Define user behaviour in code
  • Distributed & scalable
  • Proven & battle tested

Locust Alternatives & Comparisons

What are some alternatives to Locust?
It is a simple bash-like Unix shell written in Rust.
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Gatling is a highly capable load testing tool. It is designed for ease of use, maintainability and high performance. Out of the box, Gatling comes with excellent support of the HTTP protocol that makes it a tool of choice for load testing any HTTP server. As the core engine is actually protocol agnostic, it is perfectly possible to implement support for other protocols. For example, Gatling currently also ships JMS support.
It is a developer centric open source load testing tool for testing the performance of your backend infrastructure. It’s built with Go and JavaScript to integrate well into your development workflow.
Apache JMeter
It is open source software, a 100% pure Java application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.
See all alternatives

Locust's Followers
114 developers follow Locust to keep up with related blogs and decisions.
Pieter David
Karl Woodrow
Ruchika Sharma
Akshay Bhole
Dan Kirkwood
Dhilleswara Rao
karol brejna
Riyaz Ranjan
Joe Wessel