There are 3 flavours of Office 365 that you can choose for your business:
Office 365 Business Essentials is perfect for any organisation that wants to run all it's office services in the Cloud, with the resilience and data safety that brings.
Office 365 Business is a great choice for a business that wants Cloud storage and desktop apps but doesn't want to switch their email to Microsoft servers
Office 365 Business Premium includes the best of all worlds. Full access to all online services and desktop apps.
and many more powerful business tools, all in one simple subscription.