How is Adviisa different from Dropbox, OneDrive or SharePoint?

Those are general-purpose file stores. Adviisa reads your documents on the way in, extracts the key facts (companies, directors, dates, figures), tags them, and uses that intelligence to populate your company profile, surface deadlines on the Calendar, and curate Projects. It's the difference between a filing cabinet and a librarian who has read every document and knows where everything fits.