Avast One
8.9#1 in antivirus softwareFree planFree planAndroidiOSExtensionmacOS
VisitAvast One vs Microsoft Defender Antivirus
Microsoft Defender Antivirus
5.8#108 in antivirus softwareWindows
VisitWhat both publish
| Fact | Avast One | Microsoft Defender Antivirus |
|---|---|---|
| Founded | 1988 | 1975 |
| Free plan | Yes | Yes |
| Headquarters | Prague, Czech Republic | Redmond, Washington, USA |
| Protection scope | complete security | antivirus |
| Ransomware protection | The free tier includes ransomware protection that restricts untrusted apps from changing protected folders. | Yes |
| Supported platforms | Windows,macOS,Android,iOS | Windows 10,Windows 11 |
Avast One plans
- BasicPriced on request
- Basic—
- Silver Device Protection module$2.99 a month
- Gold$6.99 a month
- Platinum$9.99 a month
- Free AntivirusFree
Microsoft Defender Antivirus plans
- Microsoft Defender Antivirus built into Windows—
- Microsoft Defender Antivirus built into WindowsPriced on request
- Microsoft 365 PersonalPriced on request
- Microsoft 365 Personal—
- Microsoft 365 FamilyPriced on request
- Microsoft 365 Family—
Pick Avast One if…
You want what its maker publishes above — check its page for the details.
Pick Microsoft Defender Antivirus if…
It suits Windows 10 and Windows 11 users seeking built-in antivirus and ransomware protection. The listed Microsoft 365 plans may interest people who also want the stated device and cloud-storage allowances.