Do You Have to Pay for Qt?
I get about two calls and emails per month from agitated business owners, executives and managers that start like this:
- “Last year, Qt Sales told us that we must buy a commercial Qt license. So, we bought a 5-year Qt license for €1,000,000. And, you tell us that we can use Qt for free. We feel cheated!”
- “As a small business, we cannot afford paying €100,000 in advance for a 5-year Qt license.”
- “Qt Sales told us that we must publish our source code if we use Qt under LGPLv3.”
- “Qt Sales told us that we must allow our customers to install a modified Qt version on our harvesters. We can’t do this for safety reasons.”
This is all nonsense! No, you don’t have to pay for Qt. Like thousands of other companies, you can build the HMIs of your embedded devices with Qt under LGPLv3 - and don’t pay a single cent to The Qt Company. This includes HMIs for industrial machinery, cars, trucks, medical devices, home and professional appliances, TVs and STBs.