Just an FYI for any FOSS dev or user that might have an interest in noise reduction. It might be interesting to send in a couple of images and see what these guys have come up with. I know there are are also products from DXO and Topaz but ON1 is doing a free offer to process your image.
You could compare it back against what we can achieve with the available FOSS software just to see.
Just throwing it out there as more of an exercise than any sort of endorsement or promotion…