Node.js licensing centers on the permissive MIT license that covers the runtime itself, but the full picture includes dozens of bundled third-party components under their own licenses, and those are where most compliance obligations actually live. The one-line answer is that Node.js is easy to use commercially. The honest answer is that "Node.js" is a bundle, and shipping a bundle means honoring every license inside it.
If you distribute anything that embeds the Node.js runtime, or you are assembling a license report for an audit, it pays to understand both layers.
The MIT-Licensed Core
The Node.js project itself is released under the MIT license. MIT is about as permissive as open-source licenses get. It lets you use, copy, modify, merge, publish, distribute, sublicense, and sell the software, for commercial or private purposes, with essentially one condition: you must include the original copyright notice and the license text in copies or substantial portions of the software.
There is no copyleft, no requirement to open your own source, and no obligation to share modifications. The software is provided "as is" with no warranty. For the runtime layer alone, compliance is genuinely as simple as preserving the notice.
Why "Node.js" Is More Than One License
Here is the part teams miss. The Node.js distribution bundles several substantial third-party projects, and each carries its own license:
- V8, Google's JavaScript engine, is under a BSD-style license
- libuv, the async I/O layer, is MIT-licensed
- OpenSSL (historically) shipped under the Apache License 2.0 in modern releases
- zlib, c-ares, llhttp, and others each carry permissive licenses of their own
The project consolidates all of these into a single LICENSE file in the source tree that reproduces every component's notice. That file is the authoritative record. It is long precisely because Node.js is an assembly of many upstream projects, and the whole point of a bundled license file is to satisfy every one of their attribution requirements in one place.
None of these bundled licenses are copyleft, so the practical obligation remains attribution rather than source disclosure. But if you redistribute Node.js, "attribution" means carrying that whole LICENSE file, not just the MIT line at the top.
Your Application vs the Runtime
Draw a clear boundary. Running your JavaScript on Node.js does not make your code subject to Node's license. The MIT license and the bundled permissive licenses govern the runtime; your application source is yours. Most teams never redistribute the Node binary at all: they specify a Node version, and it gets installed from an official source at deploy time. In that model your direct Node.js obligation is minimal.
The obligation gets real when you bundle Node inside something you ship: a desktop app built on a Node-based framework, a container image, an appliance, or an installer. Now you are a redistributor of the runtime and its bundled components, and the attribution requirements attach to your artifact.
The npm Dependencies Are the Bigger Story
For most applications, the licensing risk is not the runtime at all; it is the hundreds of packages you install from npm. A typical project pulls in a deep tree of transitive dependencies, and while the ecosystem skews heavily toward MIT and ISC, it is not uniform. Copyleft licenses like GPL and, for network-served software, AGPL do appear, and an AGPL dependency buried three levels deep can create obligations that surprise a legal team.
This is why a license inventory should be generated from your actual dependency tree, not assumed. Tools can walk package-lock.json, resolve every transitive package, and flag licenses that conflict with your distribution model. Software composition analysis such as Safeguard's SCA reports the license of each component alongside its vulnerabilities, so the "what are we shipping?" question has one answer covering both risk types. We cover the permissive end of the spectrum in our MIT license summary.
Building a Defensible License Report
For a Node.js project, a defensible compliance posture looks like this. First, record which Node.js version you ship and, if you redistribute the binary, include its bundled LICENSE file in your attribution notices. Second, generate a full dependency license report from your lockfile on every build, so the report reflects reality rather than a snapshot from six months ago. Third, define a policy for which licenses are allowed, which need review, and which are blocked, then enforce it in CI so a new AGPL transitive dependency fails the build instead of shipping silently.
Automating the report is what makes it maintainable. A manual audit is accurate the day you run it and stale the next merge.
FAQ
Do I have to open-source my app because it runs on Node.js?
No. Node.js is MIT-licensed and the components it bundles are permissive, none of them copyleft. Running your code on the Node runtime imposes no obligation to disclose your source. Watch your npm dependencies instead, since a copyleft package there is where that risk actually enters.
What do I have to include if I redistribute Node.js?
Include the consolidated LICENSE file from the Node.js distribution, which reproduces the MIT license for the core plus the notices for V8, OpenSSL, libuv, and the other bundled components. Carrying that single file satisfies the attribution requirements of everything inside.
Is the MIT license compatible with commercial and proprietary software?
Yes. MIT is explicitly business-friendly: you can use it in closed-source, commercial products with no royalty and no source-disclosure requirement. The only condition is preserving the copyright and license notice.
How do I find copyleft licenses hiding in my dependencies?
Generate a license report from your lockfile so it captures the full transitive tree, then scan for GPL, LGPL, AGPL, and other reciprocal licenses. Software composition analysis tooling automates this and can fail a build when a disallowed license appears, rather than leaving it for an audit to discover.