Comparison

Locust vs Testing Library

On the evidence we track, Testing Library leads this comparison with a composite score of 65/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
Locust57
★Testing Library65
Score
vioscaleAI score
Locust57 / 100low · 49%
Testing Library65 / 100high · 77%
Pricing
Free tier
Locust✓
Testing Library✓
Model
Testing Libraryopen_source
Price level
Locustfree
Testing Libraryfree
Transparent
Locust✓
Testing Library✓
Integrations
Count
Locust4
Testing Library12
Adoption
Dependent repos
Locust1,883
Testing Library1,412,044
Github stars
Locust28,210
Testing Library3,336
Package downloads weekly
Locust–
Testing Library85,960,772
Activity
Commits last 30d
Locust53
Testing Library1
Release
Cadence days
Locust13
Testing Library15
History
Locust20 items
Testing Library20 items
License
Spdx
LocustMIT
Testing LibraryMIT
Language
Primary
LocustPython
Testing LibraryJavaScript
Content
Faq
Locust5 items
Testing Library5 items

Capabilities

Feature-by-feature on the axes that matter for testing tools. “-” means undocumented, not absent.

Core
Test types
Locust-
Testing Library-
Browser automation
Locust✓
Testing Library✗
Built-in assertion library
Locust-
Testing Library✓
Languages
LocustPython
Testing LibraryJavaScript, TypeScript
Isolation
Mocking / stubbing
Locust-
Testing Library✗
Techniques
Snapshot testing
Locust-
Testing Library✗
Performance
Parallel execution
Locust✓
Testing Library✗
Insight
Code coverage
Locust-
Testing Library✗
DX
Watch mode
Locust-
Testing Library✗
Ops
CI integration
Locust✓
Testing Library✓

What each one is

The product in its own terms, so the numbers below have context.

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.

Independently observed

Testing Library

Leader

A family of testing utilities that help you test UI components by simulating how users interact with them, focusing on confidence-building tests that avoid implementation details.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Locust

Open sourceFree tier
as of verify ↗

Testing Library

Leader
Open sourceFree tier

Free, open source under MIT license

as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Locust✓
Testing Library✓
CLI
Locust✓
Testing Library✗
Deployment
Self-hosted
Locust✓
Testing Library–

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Locust

4 total
  • Azure Load Testing
  • Azure DevOps
  • GitHub
  • VS Code
Independently observed

Testing Library

Leader
13 total
  • Jest
  • Cypress
  • GitHub Actions
  • React
  • Vue
  • Angular
  • Svelte
  • React Native
  • Mocha
  • Puppeteer
  • Testcafe
  • Nightwatch
  • JSDOM
Independently observed
Still deciding?

Locust or Testing Library: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.