- Qt 5.5
- Qt Commercial License
- Qt 5.5.1 Reference Documentation

# Qt Commercial License

Qt licensed under our commercial license agreement 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 Lesser General Public License (LGPL) GNU LGPL version 3 or version 2.1.

You can find more information on http://qt.io/licensing/.

## Purchasing and Sales Information

To purchase or further information and assistance about Qt Commercial licensing, please contact our sales via one of the following channels:

Web: | http://qt.io/contact-us/
Phone, U.S. office (for sales in North America): | +1 408 433 9320
Phone, Norway office (for sales in the rest of the world): | +47 2108 0420