MIT License adalah one of the most permissive open source licenses in use, and in plain terms it means you can use, copy, modify, merge, publish, and even sell software under it, provided you keep the original copyright notice and license text intact. The word adalah is Indonesian for "is," so the question behind this keyword is simply: what is the MIT License, and what does agreeing to it commit you to? This guide answers that from a security and compliance point of view rather than a purely legal one.
The MIT License is short enough to read in under a minute, which is part of why it has become the default for a huge fraction of the packages on npm, PyPI, and beyond. That popularity is exactly why understanding it matters when you pull those packages into your own product.
What the MIT License actually says
The license text has two operative parts. The first grants broad permission: any person obtaining a copy may deal in the software without restriction. The second sets a single real obligation: the copyright notice and the permission notice must be included in all copies or substantial portions of the software.
After that comes a disclaimer of warranty in capital letters. The software is provided "as is," and the authors are not liable for any claim or damages. That disclaimer is the security-relevant clause most people skim past, and it deserves attention.
The permissiveness is a security consideration, not just a legal one
Because the MIT License disclaims all warranty, the maintainer of an MIT-licensed dependency owes you nothing when a vulnerability is found in their code. There is no obligation to patch, no service level, no guarantee the project is even still maintained. You inherit the code and, implicitly, the responsibility for its security.
This is not a criticism of the license; it is the correct model for volunteer-driven open source. But it changes how you should treat MIT-licensed dependencies. You cannot assume someone else is watching for CVEs on your behalf. That is why continuous monitoring with an SCA tool matters even for permissively licensed code: the permissive terms give you freedom to use the package, not assurance that it is safe.
The patent gap
One technical detail separates the MIT License from the Apache 2.0 license: the MIT License predates the era when software patents were common in the United States, and it contains no express patent grant. Apache 2.0 includes an explicit patent license from contributors, which offers protection against patent claims that MIT simply does not address.
For most application developers this is a low-probability risk, but if you operate in a patent-sensitive domain, the absence of a patent clause is a real difference between two licenses that otherwise look almost identical in how permissive they are.
Compliance obligations are light but not zero
The one thing you must do is preserve attribution. If you redistribute MIT-licensed code, or ship it inside your product, the copyright and license notice have to travel with it. In practice this means:
- Keeping the
LICENSEfile that ships with the dependency - Including third-party notices in your distributed artifact
- Not stripping copyright headers from source files you carry forward
Teams that fail an audit on MIT-licensed code almost never fail on the terms themselves; they fail because their build process quietly dropped the attribution. A generated notices file, produced from your SBOM at build time, closes that gap.
MIT vs other common licenses
The MIT License is GPL-compatible: you can combine MIT code with GPL code, but the combined work falls under the GPL's copyleft terms. Compared to the BSD family, MIT is nearly equivalent in spirit, with minor wording differences. Compared to copyleft licenses like GPL or AGPL, MIT imposes no obligation to release your own source, which is why commercial products favor it.
If your organization maintains an allowlist of acceptable licenses, MIT almost always sits at the top of the "green" tier alongside Apache 2.0, BSD-2-Clause, and BSD-3-Clause. Copyleft licenses land in a "review" tier because they can impose distribution obligations on your own code.
Building MIT-license awareness into your pipeline
License tracking belongs in the same place as vulnerability tracking: your dependency inventory. Every time a new package enters the build, its license should be recorded, checked against your policy, and flagged if it is unknown or incompatible. The failure mode to avoid is a dependency whose license is UNKNOWN because the metadata was missing; that is where surprises hide, not in the well-labeled MIT packages.
For a broader treatment of tracking licenses across a large dependency tree, see our guide on OSS license management.
FAQ
Apakah MIT License gratis untuk penggunaan komersial?
Yes. The MIT License permits commercial use, including selling software that incorporates MIT-licensed code, with no royalty and no requirement to open your own source. The only condition is preserving the copyright and license notice.
Does the MIT License require me to share my modifications?
No. Unlike copyleft licenses such as the GPL, the MIT License lets you keep your modifications private. You can modify MIT-licensed code and distribute only the compiled result without publishing your changes.
Is MIT-licensed software safe to use?
The license says nothing about safety. It grants you the right to use the code but disclaims all warranty. Treat MIT dependencies like any other: scan them for known vulnerabilities and monitor them over time, because no one is contractually obligated to fix flaws for you.
What is the difference between the MIT License and Apache 2.0?
Both are permissive, but Apache 2.0 includes an express patent grant and more detailed terms around contributions and trademarks. The MIT License is shorter and has no patent clause, which is its main practical gap for patent-sensitive users.