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Bun vs pnpm: catalog facts
Bun	pnpm
Free Free and open source. The runtime core is MIT licensed with some bundled components under…	Free Free and open source.
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	One copy of each package version on disk across projects Fast parallel installs
Node compatibility is good but not complete; packages using deep internals can break Younger than Node, so fewer production deployments to learn from	Strict layout can break tools that assume npm's flat node_modules
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.