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Bun

by Oven

Fast all-in-one JavaScript runtime.

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Reviewed by the Softwares.com Editorial Team · Last updated June 2026 · How we rate

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Key facts

Vendor
Oven
Pricing
Open source — Free
Free tier
Yes
Platforms
Mac, Linux, Windows
Best for
Developers
Editor rating
4.7 / 5
Founded
2021
Headquarters
San Francisco, CA, USA

What is Bun?

Bun is a development it tool from Oven. Bun is a fast JavaScript runtime, bundler, test runner, and package manager in one.

Bun uses open source pricing and offers a free tier you can start on without a credit card. Free.

It's best suited to developers and runs on Mac, Linux, Windows.

Standout strengths include very fast, all-in-one toolchain, node-compatible. Worth weighing: younger ecosystem.

Bun pricing

Free
Free
Get Free

Pros

  • Very fast
  • All-in-one toolchain
  • Node-compatible

Cons

  • Younger ecosystem

Bun vs alternatives

See all Bun alternatives →

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Frequently asked questions

What is Bun?

Bun is a fast JavaScript runtime, bundler, test runner, and package manager in one.

How much does Bun cost?

Bun is open-source-priced. It has a free tier.

Does Bun have a free trial?

Bun offers a free tier rather than a time-limited trial.

What platforms does Bun support?

Bun is available on Mac, Linux, Windows.