Comparison

Bun vs Yarn

On the evidence we track, Bun 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.
★Bun74
Yarn64
Score
vioscaleAI score
Bun74 / 100medium · 56%
Yarn64 / 100high · 75%
Pricing
Free tier
Bun✓
Yarn✓
Price level
Bunfree
Yarnfree
Integrations
Count
Bun–
Yarn3
Reliability
Status page
Bun–
Yarn✓
Adoption
Dependent repos
Github stars
Package downloads weekly
Activity
Commits last 30d
Bun100
Yarn18
Release
Cadence days
Bun14
Yarn20
History
License
Spdx
Language
Primary
Content
Faq

Capabilities

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

Core
Role
BunPackage manager client
YarnPackage manager client
Ecosystem
Ecosystem / language
BunJavaScript
YarnJavaScript
Deployment
Deployment
BunCLI-local
YarnCLI-local
Formats
Package formats supported
BunMany formats
YarnMany formats
Hosting
Private / scoped packages
Bun✓
Yarn✓
Upstream proxy / caching
Bun✓
Yarn-
Resolution
Lockfile / deterministic installs
Bun✓
Yarn✓
Workspaces / monorepo
Bun✓
Yarn✓
Content-addressable store
Bun✓
Yarn-
Supply chain
Supply-chain integrity
Bun✓
Yarn✓
Vulnerability / licence scanning
Bun✓
Yarn✓
Licensing
Openness
BunOpen-source
YarnOpen-source
Pricing
Pricing model
BunFree / OSS
YarnFree / OSS

What each one is

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

Bun

Leader

A JavaScript runtime that executes TypeScript natively using JavaScriptCore, bundling a package manager, bundler, and test runner with Node.js compatibility and npm ecosystem support.

Independently observed

Yarn

Yarn is a modern package manager for JavaScript projects that prioritizes deterministic installations and includes built-in support for monorepos. It provides a complete solution for managing both dependencies and project structure with a focus on reliability and security.

Independently observed

Pricing

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

Bun

Leader
Open sourceFree tier

Free and open source

as of verify ↗

Yarn

Open source
as of verify ↗

Platform & deployment

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

Platforms
macOS
Bun✓
Yarn✓
Windows
Bun✓
Yarn✓
Linux
Bun✓
Yarn✓
CLI
Bun✓
Yarn✓
Deployment
Cloud / SaaS
Bun✓
Yarn✗
Self-hosted
Bun✓
Yarn✓

Integrations

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

Bun

Leader

Not documented yet.

Yarn

3 total
  • GitHub
  • Git
  • npm
Independently observed
Still deciding?

Bun or Yarn: 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.