Comparison

Locust vs Vitest

On the evidence we track, Vitest leads this comparison with a composite score of 74/100. 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
★Vitest74
Score
vioscaleAI score
Locust57 / 100low · 49%
Vitest74 / 100medium · 70%
Pricing
Free tier
Locust✓
Vitest✓
Model
Price level
Locustfree
Vitestfree
Transparent
Locust✓
Vitest✓
Integrations
Count
Locust4
Vitest2
Adoption
Dependent repos
Locust1,883
Vitest30,558
Github stars
Locust28,210
Vitest17,212
Package downloads weekly
Locust–
Stackoverflow questions
Locust–
Vitest1,200
Activity
Commits last 30d
Locust53
Vitest100
Release
Cadence days
Locust13
Vitest5
History
Locust20 items
Vitest20 items
License
Spdx
LocustMIT
VitestMIT
Language
Primary
LocustPython
Market
Availability
Content
Faq
Locust5 items
Vitest8 items

Capabilities

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

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

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

Vitest

Leader

A testing framework powered by Vite, offering Jest-compatible features including snapshots, code coverage, and mocking capabilities. It provides native TypeScript and JSX support, browser-based testing, watch mode, and benchmarking.

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 ↗

Vitest

Leader
Open source
as of verify ↗

Platform & deployment

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

Platforms
Web
Locust✓
Vitest✓
CLI
Locust✓
Vitest✓
Deployment
Self-hosted
Locust✓
Vitest✓

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

Vitest

Leader
2 total
  • Vite
  • Jest
Independently observed
Still deciding?

Locust or Vitest: 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.