Office 2021 vs Office 2019: Full Comparison and 2025 Buyer’s Guide
Microsoft Office 2021 brings many improvements over Office 2019. In this comprehensive guide, we analyze every difference to help you choose the version that perfectly matches your needs and your budget.
1. The Main New Features of Office 2021
Microsoft Office 2021 marks a significant evolution compared to Office 2019, with targeted improvements in productivity, collaboration and accessibility.
Overall Improvements
- Dark Mode Interface : New dark theme available in all applications
- Optimized performance : Faster startup and better memory management
- Enhanced accessibility : Improved tools for visually impaired users
- Advanced security : Reinforced protection against malware in documents
- Simplified collaboration : Improved sharing and co-editing
💡 Key Point
Office 2021 is the last “perpetual” version of Office. Unlike Office 365/Microsoft 365, you buy it once and use it for life with no subscription.
2. Performance and Optimizations
Office 2021 : Performance Gains
- 35% faster startup than Office 2019
- Reduced memory consumption by 20% on average
- Accelerated Excel calculations thanks to the XLOOKUP and LET functions
- Opening large files optimized in Word and PowerPoint
- OneDrive synchronization smoother
Performance Comparison Table
| Criterion | Office 2019 | Office 2021 | Improvement |
|---|---|---|---|
| Word startup time | 3.2 seconds | 2.1 seconds | +35% |
| RAM consumption | 280 MB | 225 MB | -20% |
| Complex Excel calculations | 12.5 seconds | 8.7 seconds | +30% |
| PowerPoint opening (50MB) | 8.2 seconds | 5.9 seconds | +28% |
3. New Features by Application
Microsoft Word 2021
- Improved Focus Mode : Maximum concentration by hiding distractions
- Immersive reading : Adjustable line spacing and colors
- Automatic transcription : Convert audio/video to text
- Style editor : Automatic improvement suggestions
- Microsoft Search : Intelligent search engine integration
Microsoft Excel 2021
- XLOOKUP function : Replaces VLOOKUP with more flexibility
- LET function : Defines variables within formulas
- Dynamic arrays : Formulas that resize automatically
- Data types : Automatic conversion of text into structured data
- Improved charts : New types and animations
Microsoft PowerPoint 2021
- Presenter Coach : AI that analyzes your presentation
- Screen recording : Built-in video capture
- Morph transitions : Smooth animations between slides
- Real-time captions : Automatic generation
- Icon library : Thousands of free vector icons
Microsoft Outlook 2021
- Improved calendar : New interface and features
- Meeting suggestions : AI proposes optimal time slots
- Smart search : More relevant results
- Built-in translation : 70+ languages supported
- Anti-phishing protection : Reinforced security
4. Compatibility and Configuration
Minimum Requirements
Office 2019
- OS : Windows 10 (build 1809+)
- RAM : 2 GB (32-bit) / 4 GB (64-bit)
- Storage : 3 GB of free space
- Processor : 1.6 GHz dual-core
- Support : Until October 2025
Office 2021
- OS : Windows 10 (build 1903+) / Windows 11
- RAM : 4 GB minimum (8 GB recommended)
- Storage : 4 GB of free space
- Processor : 1.6 GHz dual-core
- Support : Until October 2026
5. Pricing and Available Versions
Office 2019 Pro Plus
- ✓ Word, Excel, PowerPoint
- ✓ Outlook, Access, Publisher
- ✓ Perpetual license
- ✓ Support until 2025
- ✓ Perfect for everyday use
Office 2021 Pro Plus
- ✓ All the 2019 applications
- ✓ + New AI features
- ✓ + Optimized performance
- ✓ Support until 2026
- ✓ Best long-term investment
Office 2024 Pro Plus
- ✓ All the 2021 features
- ✓ + Artificial Intelligence
- ✓ + Built-in Copilot
- ✓ Support until 2029
- ✓ Future-proof guaranteed
💰 Profitability Calculation
Price difference : Office 2021 only costs 50€ more than Office 2019
Benefits : +1 year of support, new features, better performance = Excellent ROI!
6. Verdict and Expert Recommendations
Choose Office 2021 if :
- You want the latest features and performance
- You use complex Excel files (XLOOKUP/LET functions)
- You give presentations regularly (Presenter Coach)
- You want to benefit from Microsoft support until 2026
- You do not want to repurchase a license for several years
Stay on Office 2019 if :
- Your usage is basic (word processing, simple spreadsheets)
- You want to save 50€ on the purchase
- Your teams are accustomed to it and resistant to change
- You plan to migrate to Microsoft 365 soon
🎯 Our Final Recommendation
Office 2021 Pro Plus is the optimal choice for 85% of users. The 50€ extra cost is quickly offset by productivity gains and the extended support period.
Exception : If you plan to migrate to Microsoft 365 within the year, Office 2019 may be sufficient temporarily.
2025 trend : Office 2024 will be available at the end of 2025 with built-in AI, but Office 2021 remains the best value for money currently.
Quick Decision Table
| User Profile | Recommendation | Justification |
|---|---|---|
| Student/Basic use | Office 2021 | Longer support period |
| Professional/SMB | Office 2021 | New features = productivity |
| Data analyst | Office 2021 | Advanced Excel functions essential |
| Large enterprise | Microsoft 365 | Collaboration and centralized management |
| Very tight budget | Office 2019 | Sufficient features, reduced price |
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