Office 365 ProPlus and Office 2019 may seem similar but this article will explore the many differences as well as what they have in common.

Subscription licence versus perpetual purchase

Office 365 ProPlus is the version of Office that comes with certain Office 365 plans like E3 or E5, as well as being available as a standalone option, that can be bought on it's own.  These are subscription user-based licences that are have ongoing monthly costs. Office 365 ProPlus can be used for as long as the subscription is valid for on 5 PCs or Macs as well as tablets and phones.

Office 2019 is the perpetual version of Office that is bought as a one-off cost (one-time purchase) and can be used for as long as needed on a single PC or Mac.  There are no upgrade options with Office 2019 unlike Office 365 ProPlus which receives new features every month.  For major upgrades, it would require buying Office at the full price.  Office 2019 does receive regular security updates and bug fixes but no new features.

What’s new in Office 2019

As Microsoft describe it “Office 2019 includes a meaningful subset of features that are found in Office 365, but it's not part of Office 365”. This means Office 2019 includes certain features that have been already available to Office 365 subscribers.  Here are the main new Office 2019 features that Microsoft list:

Word

"Get work done easier"
  • Black theme
  • Learning tools (captions and audio descriptions)
  • Speech feature (text-to-speech)
  • Improved inking functionality
  • Accessibility improvements
Excel

"Perform better data analysis"
  • Funnel charts, 2D maps, and timelines
  • New Excel functions and connectors
  • Ability to publish Excel to PowerBI
  • PowerPivot enhancements
  • PowerQuery enhancements
PowerPoint

"Create more impactful content"
  • Zoom capabilities for ordering of slides within presentations
  • Morph transition feature
  • Ability to insert and manage Icons, SVG, and 3D models
  • Improved roaming pencil case
Outlook

"Manage email more efficiently"

  • Updated contact cards
  • Office 365 Groups *
  • @mentions
  • Focused inbox
  • Travel and delivery summary cards
* Requires Exchange online account

Missing features in Office 2019

Office 2019 doesn’t include all the features that Office 365 subscribers have access to, here are features that are not available in Office 2019:

Unlocks creativity
  • Editor in Word
  • Tap in Word, PowerPoint, and Outlook
  • Designer in PowerPoint
  • Researcher in Word
  • Ideas in Excel
  • Data Types in Excel
Built for teamwork
  • Real time collaboration across Word, Excel, and PowerPoint*
  • @mentions in Word, Excel, and PowerPoint
* Real-time collaboration is available in Office 2019 but only as part of Word 2019, and only when used in combination with SharePoint Online.

Integrated for simplicity
  • Shared computer licensing
  • Language packs included
  • FastTrack Options
  • Intune Integration
  • Intelligent security
  • ATP in Word, Excel, PowerPoint, and OneDrive for Business*
  • Office 365 Message Encryption
  • Office Enterprise Protection**
  • Add sensitivity label in Word, Excel, PowerPoint, and Outlook**
* Requires Exchange Online account and ATP subscription (standalone or included in Office 365 E5)
** Features coming to Office 365 ProPlus