I wish things like this would start of as an open-source and/or stand-alone app. It looks great, and I want to play with it. But Excel is at it's core used for very sensitive data. Financials, budgets, customer lists, biz plans, etc.

How and why should I trust a brand-new startup? Doubly so when they don't even list security in their docs.

tl;dr; I love the idea, looks like a great implementation, please let me demo (and then ideally purchase) an on-prem version.