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Deno vs Node.js: catalog facts
Deno	Node.js
Free The runtime is free and open source under the MIT licence. Deno Deploy, the company's…	Free Free and open source under the MIT licence, governed by the OpenJS Foundation.
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	The largest package ecosystem of any language through npm Predictable release schedule with clearly marked long-term support versions
Some npm packages that depend on Node internals still do not work A smaller ecosystem and hiring pool than Node	Single-threaded by default, so CPU-heavy work needs worker threads or another process The size and churn of the npm ecosystem is itself a supply chain risk
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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