Atom text editor is a native Ubuntu snap package in all currently supported versions of Ubuntu. Results of
snap info atom:
$ snap info atom
summary: A hackable text editor for the 21st Century.
Atom is a free and open source text editor that is modern, approachable,
and hackable to the core.
The Ubuntu Atom snap package does not have a proprietary license. The Atom GitHub webpage also describes Atom as a free and open source text editor. Atom is licensed under the
The atom-amd64.deb file has a file in it named copyright which contains a copy of the MIT License terms, yet when atom-amd64.deb is opened in the Ubuntu Software app it is mistakenly reported as having a proprietary license.
If Ubuntu Software is reporting the MIT license as a proprietary license this is a bug in Ubuntu Software, because the MIT license is a free software license. According to Wikipedia, the MIT License is a permissive free software license originating at the Massachusetts Institute of Technology (MIT). The MIT license permits reuse within proprietary software provided that all copies of the licensed software include a copy of the MIT License terms and the copyright notice.