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by jaysoncena 3511 days ago
He's probably referring to QT5. If you're a for-profit business and using QT, most likely your software is closed-sourced which requires a commercial license.

I've worked with a team who develops a windows app which still uses QT4. They cannot migrate to QT5 since it requires a commercial license.
2 comments
blub 3511 days ago
Open source doesn't always mean that one can do whatever they want with it, nor does it mean gratis.

Still, LGPL libraries can be used for commercial software, this is a rather common use case.

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SkyMarshal 3509 days ago
Yes, we looked at Qt 1.5yrs ago, and we were a for-profit startup creating an MIT-licensed open source desktop software that we needed to add a UI to, for which we were considering Qt5 for specific features. It was a weird, edge case mix.
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