From what I can see, you can do 2 pages (up to 32 bars each) for free; otherwise it’s $5 per month, for 100 scans, up to 25 pages each.
I have been testing Soundslice. I tried it several years ago, and evidently didn’t think it was world a subscription. It seems much improved now. I have added some notes here:
Most importantly, this is utilizing machine learning. IOW, when it is unclear about an interpretation, it asks the customer for a human decision. That means that the software should gradually get better as more and more scores are passed through the system. When you have such a training loop, AI really can improve quickly.