I work at a company that doesn’t allow confidential data to be stored in the cloud. However, the company does not offer anything for notetaking that is as compatible with my brain as Dynalist is.
I already voted for [Pro]True Offline Mode, but I wanted to make an alternate suggestion, just in case it might be easier to implement.
I’m not sure how your synchronization works, but would be possible to have a mode where all of the actual text is symmetrically encrypted locally by the browser, but the synchronization mechanisms and data storage are otherwise unaffected? The UI required would be an option to create an encrypted file, plus entering a local password to unlock it. In my case, since I’m using a company computer to edit the data, it would be fine to store that local password locally so that I don’t have to re-enter it each time.
If that were possible, I think it would be OK for me to use, and it would have a nice advantage of still supporting cloud synchronization and storage. Either way is OK with me though.