Office 365

 Office 365
Business Essentials
Office 365
Business
Office 365
Business Premium
$6.40 user/month$11.00 user/month$16.00 user/month
Best for businesses that need business email and other business services on PC, Mac, or mobile. Desktop versions of Office apps not included.Best for businesses that need Office apps plus cloud file storage and sharing on PC, Mac, or mobile. Business email not included.Best for businesses that need business email, Office apps, and other business services on PC, Mac, or mobile.
Office Apps includedOutlook
Word
Excel
PowerPoint
Outlook
Word
Excel
PowerPoint
Access (PC only)
Outlook
Word
Excel
PowerPoint
Access (PC only)
Services IncludedExchange
OneDrive
SharePoint
Microsoft Teams
OneDriveExchange
OneDrive
SharePoint
Microsoft Teams
Exchange Mailbox50GB-50GB
Desktop Version-YesYes
Web VersionYesYesYes
LetSignItYes-Yes

Desktop Versions: Each user can install the Office apps on up to 5 PCs or Macs.

Web versions: Outlook, Word, Excel and PowerPoint

OneDrive: 1 TB of OneDrive storage for file storage and sharing.

LetSignIt: An email signature manager by letsignit.io  Free version included.

Please read complete Office 365 details on Microsoft page.