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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 12.1K GitHub stars and 1.7K GitHub forks. Here’s a link to Locust's open source repository on GitHub

Who uses Locust?

17 companies reportedly use Locust in their tech stacks, including confirm IT solutions, Essence, and Mirumee Software.

42 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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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.
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. is a free load testing service that allows you to stress test your web-apps/apis with thousands of concurrent connections.
See all alternatives

Locust's Followers
71 developers follow Locust to keep up with related blogs and decisions.
amnis azeneth
xi guan
Dodi Prasetyo
Andy Winders
Sandeep Human
Raj Singh
Fernando Paccola
Matt Birdsall
Jignesh Parmar
ozgur ozkok