Qt open source application for commercial use?
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Hi all,
Can we use the applications (which are created using Qt open source) for commercial purposes ?
Or do we need a paid version of Qt framework?Thanks in advance!
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Please read the documentation page on Qt open source.
The question is answered at:
https://www.qt.io/download-open-sourceLastly, I remember that the same topic is addressed during the installation of OS Qt.
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Please read the documentation page on Qt open source.
The question is answered at:
https://www.qt.io/download-open-sourceLastly, I remember that the same topic is addressed during the installation of OS Qt.
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@Txai That's a confusing document. It could use a rewrite.
Question is, does open source Qt come in an LGPL flavor.
If I recall, LGPL allows for commercial use.@clarify
The documents @Txai referenced speak extensively about Qt being offered "in an LGPL flavor". They also mention which LGPL versions and there are a few GPL modules. TQtC gives you a "summary checklist" of Qt open source requirements.
LGPL does allow for commercial use.
You must of course adhere carefully to LGPL terms to take advantage of LGPL licensing. -
The LGPL and GPL allow for commercial use. Companies such as Red Hat have made a business of it.
The major implication of these licenses is a set of requirements for distribution of source along with compiled code, or the ability to substitute a different copy of the code for LGPL linking.
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The LGPL and GPL allow for commercial use. Companies such as Red Hat have made a business of it.
The major implication of these licenses is a set of requirements for distribution of source along with compiled code, or the ability to substitute a different copy of the code for LGPL linking.
@jeremy_k said in Qt open source application for commercial use?:
The LGPL and GPL allow for commercial use. Companies such as Red Hat have made a business of it.
This statement might be a little bit misleading. With the GPL you need to provide your own source code to your customers. Only the LGPL does not have this requirement. (Which is the sole reason to have both the GPL and LGPL.) Few businesses will thrive if their code is publicly available. RedHat sells services and support, but not programs.
In easy terms you can use Qt under the LGPL for commercial software. Stay clear of the few modules that are only available under the GPL (and commercial license) but not the LGPL if you don't want to publish your source code.
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@jeremy_k said in Qt open source application for commercial use?:
The LGPL and GPL allow for commercial use. Companies such as Red Hat have made a business of it.
This statement might be a little bit misleading. With the GPL you need to provide your own source code to your customers. Only the LGPL does not have this requirement. (Which is the sole reason to have both the GPL and LGPL.) Few businesses will thrive if their code is publicly available. RedHat sells services and support, but not programs.
In easy terms you can use Qt under the LGPL for commercial software. Stay clear of the few modules that are only available under the GPL (and commercial license) but not the LGPL if you don't want to publish your source code.
@SimonSchroeder said in Qt open source application for commercial use?:
@jeremy_k said in Qt open source application for commercial use?:
The LGPL and GPL allow for commercial use. Companies such as Red Hat have made a business of it.
This statement might be a little bit misleading. With the GPL you need to provide your own source code to your customers. Only the LGPL does not have this requirement.
You seem to be rephrasing my second paragraph.
