Upgrading to Pro costs $9.99 per month (or $99 per year) and gives you:
Business accounts allow you to work in teams. You get everything Pro users have, but you also have the ability to share dashboards with only specific people within your organization.
Every dashboard has permissions for viewing and editing. You can even create groups to make assigning these permissions faster. With Business, you have one place to manage your users, and one simple bill for everyone.
Business accounts start with 5 users and are $15 /user/month. For more information, check out the Dash business site.