# MIT license | | The **MIT License** is a permissive free software license originating at the Massachusetts Institute of Technology (MIT) in the late 1980s. As a permissive license, it puts only very limited restriction on reuse and has, therefore, high license compatibility. | |-|-| | | wikipedia:: [MIT License](https://en.wikipedia.org/wiki/MIT_License) | > [!summary]- Wikipedia Synopsis > The **MIT License** is a permissive free software license originating at the Massachusetts Institute of Technology (MIT) in the late 1980s. As a permissive license, it puts only very limited restriction on reuse and has, therefore, high license compatibility.Unlike copyleft software licenses, the MIT License also permits reuse within proprietary software, provided that all copies of the software or its substantial portions include a copy of the terms of the MIT License and also a copyright notice. As of 2020, the MIT License was the most popular software license found in one analysis, continuing from reports in 2015 that the MIT License was the most popular software license on GitHub.Notable projects that use the MIT License include the X Window System, Ruby on Rails, Node.js, Lua, and jQuery. Notable companies using the MIT License include Microsoft (.NET), Google (Angular), and Meta (React). - A short and simple permissive license with conditions only requiring preservation of copyright and license notices. Licensed works, modifications, and larger works may be distributed under different terms and without source code. - https://choosealicense.com/licenses/mit/ - When in doubt, use an MIT license