Reviewed by the Softwares.com Editorial Team · Last updated June 2026 · How we rate
Key facts
- Vendor
- Locust
- Pricing
- Open source - Free
- Free tier
- Yes
- Platforms
- Self Hosted, Api
- Best for
- Developers, Qa Engineers
- Editor rating
- 4.4 / 5
- Founded
- 2011
- Headquarters
- Remote
What is Locust?
Locust is a software testing tool from Locust. An open-source, Python-based load testing tool that lets you define user behavior in code and simulate millions of concurrent users across distributed workers.
Locust uses open source pricing and offers a free tier you can start on without a credit card. Free.
It's best suited to developers, qa engineers and runs on Self Hosted, Api.
Standout strengths include define tests in python, distributed and scalable, live web ui. Worth weighing: python knowledge required, no managed cloud.
Locust pricing
Pros
- Define tests in Python
- Distributed and scalable
- Live web UI
Cons
- Python knowledge required
- No managed cloud
Locust vs alternatives
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Frequently asked questions
What is Locust?
An open-source, Python-based load testing tool that lets you define user behavior in code and simulate millions of concurrent users across distributed workers.
How much does Locust cost?
Locust is open-source-priced. It has a free tier.
Does Locust have a free trial?
Locust offers a free tier rather than a time-limited trial.
What platforms does Locust support?
Locust is available on Self Hosted, Api.