k6 vs Locust
Updated June 2026 · A structured head-to-head comparison.
The verdict
Both k6 and Locust are credible software testing tools, and the right pick comes down to your priorities.
Choose k6 if you want broader platform coverage. Load testing for engineering teams.
Locust - Scalable load testing written in Python
k6 vs Locust: side by side
| Dimension | k6 | Locust |
|---|---|---|
| Starting price | Free | Free |
| Free plan | Yes | Yes |
| Pricing model | Freemium | Open source |
| Best for | Developers, Sre | Developers, Qa Engineers |
| Platforms | Mac, Windows, Linux, ApiWinner | Self Hosted, Api |
| Rating | 4.6/5 | 4.4/5 |
k6 key facts
- Vendor
- Grafana Labs
- Pricing
- Freemium - Free
- Free tier
- Yes
- Platforms
- Mac, Windows, Linux, Api
- Best for
- Developers, Sre
- Editor rating
- 4.6 / 5
- Founded
- 2017
- Headquarters
- Stockholm, Sweden
Locust 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
Frequently asked questions
Is k6 better than Locust?
Neither is universally better - k6 edges ahead on overall rating, but the best choice depends on price, platforms, and your use case. See the side-by-side table above.
Is k6 or Locust cheaper?
k6 is the more affordable of the two to get started, at free. k6 starts at free; Locust starts at free.
Can k6 replace Locust?
Yes for most teams - both are software testing tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.