Yes. http://Tonos.music is the one I've been working on. Timber is a competitor that got $5m in funding from Adobe.
We seek to complement the user by giving them access to a mix and master engineer, not replacing them like with Suno. We've got a booth at MONO sf this weekend at the Midway in SF, come find us! if you're on the fence, email me for a promo code to the conference!
How would you compare it to something like Landr or Ozone for mastering?
The problem I have with the AI mastering is it seems to be a bit clumsy with making the master fit the song. A lot of these tools just have simple buttons like "low, medium high", and seem to default to really squashing the dynamics to achieve maximum loudness. I have worked with both human mastering engineers and AI mastering, and I would say a decent human mastering engineer is noticeably better at feeling out the songs and finding the right balance.