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Deno vs Yarn: catalog facts
Deno	Yarn
Free The runtime is free and open source under the MIT licence. Deno Deploy, the company's…	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Permissions are denied by default; a script must be granted file, network or environment access TypeScript runs directly with no build step or configuration	Workspaces for monorepos Stable, reproducible installs
Some npm packages that depend on Node internals still do not work A smaller ecosystem and hiring pool than Node	Plug'n'Play can conflict with tools that expect node_modules Documentation split between modern Yarn and Yarn Classic
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: BSD-2-Clause
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.