Thanks for asking! I'm really excited about a ZK note app!
We haven't yet determined the priority of this vs. other projects in 2017. If you haven't already, please signal your interest below[1].
So far it is a prototype, although it is based on the already proven code used in Semaphor[2], our encrypted group chat and file sharing application, so it's "just" a bunch of UI work now :-)
At this moment I'm a paying user of both Evernote and Dropbox and I do not like how they are focusing on extra bells&whistles instead of investing time in their encryption methods to make my data more safe.
From a business perspective you can get the money that I give to Evernote and Dropbox if Spideroak offers competing products. And for me the advantage is that my data is more secure because of the zero knowledge(1) idea and I do not need to worry about wild ideas from companies think about employees reading my notes "to make my experience better". Yes I'm looking at you Evernote.
(1) until 10 minutes ago I did not know that zero knowledge had a specific technical meaning that is different than what Spideroak implements. And I even have Bruce Schneiers Applied Cryptography on my bookself. I'll need to read that again. Maybe it should be called "Full stack encryption" because it covers everything from data transport, to storage, to metadata encryption, etc...
From a business perspective you can get the money that I give to Evernote and Dropbox if Spideroak offers competing products. And for me the advantage is that my data is more secure because of the zero knowledge(1) idea and I do not need to worry about wild ideas from companies think about employees reading my notes "to make my experience better". Yes I'm looking at you Evernote.
(1) until 10 minutes ago I did not know that zero knowledge had a specific technical meaning that is different than what Spideroak implements. And I even have Bruce Schneiers Applied Cryptography on my bookself. I'll need to read that again. Maybe it should be called "Full stack encryption" because it covers everything from data transport, to storage, to metadata encryption, etc...