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Software · head to head

Bun vs Yarn

Bun logo

Bun

Software

JavaScript runtime, bundler, test runner and package manager unified in single toolchain

From
Free
Rated
-
Full reviewWebsite
Yarn logo

Yarn

Software

Fast, reliable, and secure dependency management

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Bun linux requires kernel 5.6 or higher (5.1 minimum but with compatibility issues); older systems not supported; Yarn yarn 2+ (Berry) has limited ESM support which can be a constraint for some projects

Where they differ

Only the attributes on which Bun and Yarn actually diverge.

Attributes where Bun and Yarn differ
AttributeBunYarn
Pricing modelopen-sourcefree
PlatformsmacOS, Windows, Linux, FreeBSD, AndroidWeb, Linux, macOS, Windows
FoundedUnknown2016

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).

What people use each for

The jobs each tool is most often brought in to do.

Bun

  • High-performance JavaScript services prioritising startup time and memory efficiencynot Yarn
  • Single-file executable deployment without Node runtime dependenciesnot Yarn
  • Monorepo management with workspace supportnot Yarn
  • Full-stack development with unified toolchainnot Yarn
  • Systems programming and shell scripting with JavaScriptnot Yarn

Yarn

No use cases recorded yet. See the Yarn review.

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Bun

  • Linux requires kernel 5.6 or higher (5.1 minimum but with compatibility issues); older systems not supported
  • Native Node.js addons not supported directly; requires FFI workarounds for C libraries
  • Ecosystem less mature than Node.js; fewer third-party packages optimised for Bun
  • Windows support newer and less mature than Linux/macOS; occasional edge cases

Yarn

  • Yarn 2+ (Berry) has limited ESM support which can be a constraint for some projects
  • Smaller ecosystem and community compared to npm, though still substantial

Pricing, plan by plan

Bun

Free

No published plan breakdown. See the Bun review.

Yarn

Free

No published plan breakdown. See the Yarn review.

Which should you pick?

Choose Bun if

  • You want to start without paying.
  • You work on macOS, Windows, Linux, FreeBSD, Android.
Bun review

Choose Yarn if

  • You want to start without paying.
  • You work on Web, Linux, macOS, Windows.
Yarn review

Questions people ask

Is Bun or Yarn better?
Neither clearly leads. Bun starts at Free and Yarn at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Bun or Yarn?
Bun starts at Free and Yarn at Free.
Does Bun or Yarn run on more platforms?
Bun runs on macOS, Windows, Linux, FreeBSD, Android. Yarn runs on Web, Linux, macOS, Windows.
Can I use Bun for free?
Both have a free tier, so you can try either at no cost before committing.
What is Bun best used for?
Bun is most often used for high-performance javascript services prioritising startup time and memory efficiency, single-file executable deployment without node runtime dependencies, monorepo management with workspace support, full-stack development with unified toolchain. Of those, high-performance javascript services prioritising startup time and memory efficiency and single-file executable deployment without node runtime dependencies are not what Yarn is typically brought in for.

Answered from the vendors’ own pages

Yarn: What is Yarn's main advantage over npm?

Yarn downloads packages in parallel, significantly reducing installation time. It uses a yarn.lock file for deterministic installs, ensuring identical package versions across machines and preventing version conflicts common with npm.

Source
Yarn: Can I use Yarn in offline environments?

Yes, Yarn supports secure offline environments. The yarn.lock file enables reproducible installs without requiring new downloads.

Source
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Related pages

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