Load test with Python code, scale easily
Visit WebsiteReviews onG2
10 reviews trackedThe Bottom Line
Entry price
Free plan available, paid tiers above
Biggest pro
Python load testing
Biggest con
Python knowledge needed
TL;DR - Locust
- Locust is an open-source load testing tool written in Python
- It simulates millions of users with code-based test scenarios
- Completely free and open-source
Pricing: Free plan available
Best for: Growing teams
4.3/5 across review platforms
What is Locust?
Locust tests system performance with Python. Write test scenarios as code, run distributed load-performance testing that feels like programming.
The Python interface is natural. The distribution scales. The metrics are detailed.
Developers wanting load testing in Python choose Locust for code-based performance tests.
Available on: Web, macOS, Linux, Windows
Pros & Cons
Pros
- Python load testing
- Easy to write tests
- Good UI
- Open source
- Distributed testing
Cons
- Python knowledge needed
- Resource intensive
- Limited protocol support
- Reporting basic
- Alternatives exist
Ratings Across the Web
4.3(10 reviews)
Ratings aggregated from independent review platforms. Learn more
Key Features
Load testingPython scriptsDistributedReal-time statsWeb UIOpen source
Pricing Plans
Most Popular
Locust (Open Source)
Free
Self-hosted
- Unlimited VUs
- Python scripting
- Distributed testing
- Real-time stats
- MIT license
Locust Cloud
Usage-based
Managed service
- Hosted infrastructure
- Detailed reporting
- Easy scaling
- No setup
Reviews
4.3/5
Across 10 verified user reviews on G2
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Locust FAQ
Is Locust free?
Open source and free. Python-based load testing. No paid version.
What is Locust?
Load testing tool. Write tests in Python. Distributed testing support.
Locust vs k6?
Locust uses Python. k6 uses JavaScript. Both excellent for load testing.
Source: locust.io