What is Locust?
An open-source framework for writing performance tests as regular Python code, supporting distributed testing across multiple machines with real-time progress monitoring and the ability to test HTTP and other protocols.
Locust pricing
We don't have Locust's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What Locust does
The capabilities that matter for testing tools, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Test types
- -
- Browser automation
- ✓
- Built-in assertion library
- -
- Languages
- Python
- Mocking / stubbing
- -
- Snapshot testing
- -
- Parallel execution
- ✓
- Code coverage
- -
- Watch mode
- -
- CI integration
- ✓
Platform & deployment
Independently observed- CLI
- Web
- Self-hosted
Integrations (4)
Independently observed- Azure Load Testing•
- Azure DevOps•
- GitHub•
- VS Code•
Security & compliance
Known vulnerabilities: 1 (0 in the last 12 months), max severity MODERATE sourcea count reflects scale & disclosure, not quality
Locust FAQ
Common questions about Locust, answered from independent, dated evidence.
What is Locust?
A Python-based tool for performance testing that simulates thousands of concurrent users to stress-test web applications. Tests are written as plain Python code and can run distributed across multiple machines. It is indexed under Testing Tools.
Source: https://locust.io
Is Locust free to use?
Locust is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.
Source: https://locust.io
What platforms does Locust support?
Locust supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://locust.io
Can Locust be self-hosted?
Yes. Locust can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://locust.io
Is Locust open source?
Yes. Locust is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Locust alternatives
Other testing tools we track, ranked by the same independent score.
- JestA straightforward testing framework for JavaScript projectsmedium · 69%
- PlaywrightA browser automation and testing framework supporting Chromium, Firefox, and WebKithigh · 76%
- pytestPython testing framework emphasizing simplicity with sophisticated scalabilitymedium · 72%
- VitestA Vite-powered testing framework for modern developmentmedium · 70%
- PuppeteerControl browsers programmatically from JavaScriptmedium · 66%
- SeleniumA framework for automating web browser interactionshigh · 76%
Compare Locust
Side by side against other testing tools, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Locust, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Development activity | 55 | 0.12 | 6.5 | ✓ |
| Release cadence | 93 | 0.07 | 6.2 | ✓ |
| Capabilities | 58 | 0.08 | 4.8 | ✓ |
| Dependent projects | 55 | 0.08 | 4.4 | ✓ |
| Security score | 63 | 0.05 | 3.3 | ✓ |
| Stars | 84 | 0.03 | 2.8 | ✓ |
| Integrations | 20 | 0.05 | 1.1 | ✓ |
| Security posture | 0 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 53 | mediumsource · 2026-10-15 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 5 items | mediumsource · 2026-09-10 · 67% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Languages: Python · Ci integration: Yes · Browser automation: Yes · Parallel execution: Yes | mediumsource · 2026-10-15 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 4 | mediumsource · 2026-09-14 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Python | highsource · 2026-10-15 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-10-15 · 95% |
Pricing
Release
Security
Is Locust the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Locust against the rest of the testing tools we index, using the same dated evidence weighted your way.
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Is this your product?
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