Complete Office 2021 vs Microsoft 365 comparison to help businesses choose. AtFast Licenses, we offer you the best genuine software licenses at the best price, with immediate activation and support included.
🔍 Why choose an official license?
Official licenses guarantee regular security updates, full technical support and full legal compliance. Unlicensed software exposes your business to major risks: viruses, ransomware, legal fines and loss of critical data.
✅ The advantages of Fast Licenses
- ⚡Immediate activation— key received by email in a few minutes
- 🔒100% official— genuine Microsoft and publisher licenses
- 💰Best prices— up to -70% compared to official prices
- 🛡️Lifetime warranty— assistance in case of activation problems
- 📞24h support— dedicated team to support you
📊 Price comparison 2026
| Product | Official price | Fast Licenses |
|---|---|---|
| Windows 11 Pro | 259€ | From 29€ |
| Office 2021 Pro | 439€ | From 39€ |
| Antivirus 1 year | 59€ | From 15€ |
🚀 Order in 3 steps
Browse our catalog and select the license that suits your needs.
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Receive your key by email and activate your software in just a few clicks.
“I ordered a license for my entire computer fleet. Immediate delivery, perfect activation, and after-sales service responded in less than an hour. I recommend Fast Licenses without hesitation!”
Marc D. — SME Manager, Lyon🔐 Our security guarantees
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See our licenses →❓ Frequently asked questions
What is the difference between Office 2021 and Microsoft 365?
Office 2021 is a one-time purchase with no subscription, while Microsoft 365 requires a monthly or annual subscription.
Does Office 2021 include Teams?
Yes, the Pro version of Office 2021 includes Teams, Word, Excel, PowerPoint and Outlook.
Can I use Office 2021 without internet?
Yes, unlike Microsoft 365, Office 2021 works entirely offline.
This article was written by the teamFast Licenses— software licensing experts.
Keywords: office 2021, microsoft 365, business office suite · © 2026 Fast Licenses
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