The GPLv3 License (GPLv3) Copyright (c) 2015 Denis Lukov Commercial license If you want to use Clusterize.js to develop commercial sites, themes, projects, and applications, the Commercial license is the appropriate license. With this option, your source code is kept proprietary. Purchase a Clusterize.js Commercial License at uplabs.com/posts/clusterize-js-commercial-license Open source license If you are creating an open source application under a license compatible with the GNU GPL license v3, you may use this project under the terms of the GPLv3.