Paperspace solves the pain around mlops, FloydHub improves deep learning workflows - both target purely technical users. The notebook of choice in both cases is Jupyter/JuperLab.

With Deepnote, our focus is improving usability of notebooks as a medium for both data scientists and non-technical users. We want to build a really good notebook experience that plays well with the rest of your stack and helps data science teams work better with the rest of the organization.