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Bun vs Deno: catalog facts
Bun	Deno
Free Free and open source. The runtime core is MIT licensed with some bundled components under…	Free The runtime is free and open source under the MIT licence. Deno Deploy, the company's…
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Runtime, bundler, test runner and package manager in one executable Much faster startup and installs than the Node and npm equivalents	Permissions are denied by default; a script must be granted file, network or environment access TypeScript runs directly with no build step or configuration
Node compatibility is good but not complete; packages using deep internals can break Younger than Node, so fewer production deployments to learn from	Some npm packages that depend on Node internals still do not work A smaller ecosystem and hiring pool than Node
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 21, 2026

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