1. Familiarity: lots of people use Dropbox, 2. Independence: I've known companies that switch between Microsoft's O365 and Google's G Suite (or some other opti

1. Familiarity: lots of people use Dropbox, 2. Independence: I've known companies that switch between Microsoft's O365 and Google's G Suite (or some other option). If cloud/synch storage isn't linked to your email provider that can be considered to be a Good Thing to a lot of I/T decision makers. 3. Security. Not really -- I would choose SpiderOak ONE for security personally -- but Dropbox has done a lot of work to make I/T decision makers believe they are a more secure choice than Google Drive or One Drive.