So what do you actually do? I work with Jupyter notebooks daily. I'm not really sure what you are actually doing with them even after visiting both of your links. Are you hosting deployments on the web? Changing how common plotting tools are displayed?

Having the expandable/collapsible code is nifty for sure, but that's the main feature I noticed.

If I can offer some perhaps unsolicited feedback, I'd like for you guys to make it more clear (explitcly clear) what exactly you are offering. Your main web page just looks like a sales pitch for jupyter notebooks in general.