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Bun vs Parcel: catalog facts
Bun	Parcel
Free Free and open source. The runtime core is MIT licensed with some bundled components under…	Free Free to install from the npm registry.
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	Works without configuration for common projects Supports many languages and asset types out of the box
Node compatibility is good but not complete; packages using deep internals can break Younger than Node, so fewer production deployments to learn from	Requires Node.js and a package manager Less control than heavily configured bundlers for unusual setups
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
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 24, 2026

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