Reliable Source of QR Code Generation

we’ve been poking around with using some of the free web based QR Code websites and I’m curious what everyone is using for this where it’s business critical to get a reliable result, we are also after the ability to control the ECC/Recoverability which I cannot find reference to with some providers.

I see Kaywa running around however when I email their contact form I’ve had some bounce backs which were concerning.
IDAutomation have something however from what I can see it’s an on-prem application only

where playing with QR code API: command “create-qr-code” (generate QR code, QR code generator) which does most of what we need however reliability is a question without some level of contract or SLA