<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- licenses.qdoc --> <title>Qt Licensing | Qt 5.9</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td ><a href="index.html">Qt 5.9</a></td><td >Qt Licensing</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#purchasing-and-sales-information">Purchasing and Sales Information</a></li> <li class="level1"><a href="#licensed-code-in-qt">Licensed Code in Qt</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">Qt Licensing</h1> <span class="subtitle"></span> <!-- $$$licensing.html-description --> <div class="descr"> <a name="details"></a> <p>Qt is available under different licensing options designed to accommodate the needs of our various users:</p> <ul> <li>Qt licensed under <i>commercial</i> licenses is appropriate for development of proprietary/commercial software where you do not want to share any source code with third parties or otherwise cannot comply with the terms of the GNU LGPL version 3.</li> <li>Qt licensed under the <a href="lgpl.html">GNU Lesser General Public License (LGPL)</a> version 3 is appropriate for the development of Qt applications provided you can comply with the terms and conditions of the GNU LGPL version 3 (or GNU GPL version 3).</li> </ul> <p>Qt contains also <a href="licenses-used-in-qt.html">third-party code</a> that is licensed under specific open-source licenses from the original authors.</p> <p><b>Note: </b>For open-source licensed Qt, some specific parts (modules) are not available under the GNU LGPL version 3, but under the <a href="gpl.html">GNU General Public License (GPL)</a> instead. See the list of <a href="qtmodules.html#gpl-licensed-addons">Qt modules</a> for details. For commercial licensees, all modules are available under a single, commercial Qt license.</p><p><i>Qt documentation</i> is licensed under the terms of the <a href="fdl.html">GNU Free Documentation License (FDL)</a> version 1.3, as published by the Free Software Foundation. Alternatively, you may use the documentation in accordance with the terms contained in a written agreement between you and The Qt Company.</p> <p>See <a href="http://qt.io/licensing/">http://qt.io/licensing/</a> for an overview of Qt licensing.</p> <a name="purchasing-and-sales-information"></a> <h2 id="purchasing-and-sales-information">Purchasing and Sales Information</h2> <p>To purchase a Qt license, visit <a href="http://www.qt.io/download/">http://www.qt.io/download/</a>.</p> <p>For further information and assistance about Qt licensing, contact our sales; see <a href="http://www.qt.io/locations/">http://www.qt.io/locations/</a> for contact details.</p> <a name="licensed-code-in-qt"></a> <h2 id="licensed-code-in-qt">Licensed Code in Qt</h2> <p>The following page documents the open-source licenses used in different parts of Qt:</p> <ul> <li><a href="licenses-used-in-qt.html">Licenses Used in Qt</a></li> </ul> </div> <!-- @@@licensing.html --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>