Who makes it for them?

I'll answer my own question guessing it is a Bosch product. That should make reviews easier to find.

Yes, I believe Thermador is a part of Bosch.
We are looking at both the Thermador built in coffee maching and the Miele. On this forum, I've seen reviews of Miele...and seems to be positive. If anyone has any experience with Thermador, I'd love to hear it. We opted for a few other Thermador appliances (range, steam oven, warming drawer). Thanks in advance!

We have the Miele (non-plumbed) and when we were looking at the different options, what stood out as a negative about the Thermador was that you access everything inside by pulling the unit out and reaching in from the top. That seemed much more awkward than the Miele, which you can access by opening the front like you would a cupboard door. This was almost 2 years ago, so possibly the Thermador design has changed. Hope this helps!