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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 20.2K GitHub stars and 2.6K GitHub forks. Here’s a link to Locust's open source repository on GitHub

Who uses Locust?

34 companies reportedly use Locust in their tech stacks, including Craftbase, Samba Tech, and Peek Stack.

117 developers on StackShare have stated that they use Locust.

Locust Integrations

Pros of Locust
Supports distributed
Open source
Easy to use
Easy to setup
Test Anything
Decisions about Locust

Here are some stack decisions, common use cases and reviews by companies and developers who chose Locust in their tech stack.

Vrashab Jian
Shared insights
Flood IOFlood IOLocustLocustGatlingGatling

I have to run a multi-user load test and have test scripts developed in Gatling and Locust.

I am planning to run the tests with Flood IO, as it allows us to create a custom grid. They support Gatling. Did anyone try Locust tests? I would prefer not to use multiple infra providers for running these tests!

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Shared insights

I am looking for a performance testing tool that I can use for testing the documents accessed by many users simultaneously. I also want to integrate Jenkins with the performance automation tool. I am not able to decide which shall I choose Gatling or Locust. But for me, Jenkins integration is important. I am looking for suggestions for this scenario.

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Shared insights

We're using Locust for load testing and k6. I came across k6 and I like JavaScript, please suggest which is better for API testing k6 or Locust?

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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
294 developers follow Locust to keep up with related blogs and decisions.