If you do not need the entire Microsoft Office 365™ bundles, and perhaps just want email or OneDrive for Business. Standalone plans allows you to just pick one specific feature of Office 365™. They can also be added to Business and Enterprise plans that don't already included them.
OneDrive for Business
The business email you need to be productive.
Store, sync, and share at the speed of business.
Your Office, whenever you go. Get the latest tools for productivity, collaboration, compliance, and BI - delivered fast, with smooth upgrades.