Qt lgpl license and commercial software hosting

The license allows developers and companies to use and integrate a software component released under the lgpl into their own even proprietary software without being required by. Qt is available under both commercial licenses and open source gpl 2. As the qt legal gal i receive numerous questions from companies looking to use qt, wanting to know which license makes the most sense for them. Nokia believes will bring more software partners to qt and to the nokia. This means that even if software using this library were to be released. Qt licensed under commercial licenses is appropriate for development of.

The qt framework is available under both open source and commercial licenses. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. The gnu lesser general public license lgpl is a freesoftware license published by the free software foundation fsf. I dont get why qt and some other things are not fully gpl. So im remaking a product and was approaching qt about the. Learn which license is right for you and get started with your development today. The qt company gratefully acknowledges these and other contributions to qt.

You can get a commercial license which allows you to do everything with qt with no concerns about opensource. Qts lgpl license relates to qt and qt only, so you can package your code and license it however you like, but unless you plan on buying a qt commercial license, you have to dynamically link to qt. Qt licensed under the gnu lesser general public license lgpl version 2. With the commercial license you also have access to the official qt support. The commercial licenses are sold on a perdeveloper, perplatform basis. Qt licensed under the gnu lesser general public license lgpl 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. The commercial qt license gives you the full rights to create and distribute software on your own terms without any open source license obligations.

The commercial license will be useful for peoplefirms who want to distribute. Server side, but distributed, to be run by enterprises on their own servers. Comparison of sourcecodehosting facilities free software free software. Qt is a popular crossplatform software development framework and. If you choose to use the qt library under the opensource lgpl license, you may either statically or dynamically link it. Some specific parts modules of the qt framework are not available under the gnu lgpl version 2. Qt for application development is duallicensed under commercial and open source licenses. Nokia qt lgpl switch huge win for crossplatform development ars. The free software foundation may publish revised andor new versions of the gnu lesser general public license from time to time. Qts commercial license is for when you wish to modify qts source code, and not release the changes you have made to the public. Revised versions of the gnu lesser general public license. You can use only those parts of qt that are under the lgpl and have no concerns about opensource.

Licensees holding valid commercial qt licenses may use this file in accordance with the commercial license agreement provided with the software or, alternatively, in accordance with the terms contained in. Public license lgpl version 3 is appropriate for the development of qt applications. We recommend that programs that use qt also acknowledge these contributions, and quote these license statements in an appendix to the documentation. So do take all these answers with a grain of salt, because otherwise you may be exposing yourself to lawsuits. Qt contains also thirdparty code that is licensed under specific opensource licenses from the original authors. I mean, if you dont need to modify the qtlibrary, you dont need commercial license. This means that you still cannot use these modules in closedsource software.