Docs
Is Microsoft Defender Free? What You Actually Get
Find out whether Microsoft Defender is free, what comes built into Windows, what requires Microsoft 365, and which Defender products are paid or trial-based.
Informational for IT admins, MSPs, small business buyers, Microsoft 365 buyers, and Windows users trying to understand what Defender is actually free vs paid
Partly yes, partly no. Microsoft Defender Antivirus is built into modern Windows, but the Microsoft Defender app for individuals requires a qualifying Microsoft 365 Personal, Family, or Premium subscription, and business products like Defender for Endpoint are paid services even though Microsoft offers a free trial for some plans.
The confusion happens because Microsoft uses the Defender name across built-in Windows security, a consumer cross-device app, and enterprise security products. This page separates those layers so you can see what is free, what is included with another subscription, and what is paid or trial-based.
What You'll Get
- Separate built-in Windows Defender Antivirus from the Microsoft Defender app and business Defender products
- Understand what is free with Windows versus what needs Microsoft 365 or business licensing
- Avoid buying or documenting the wrong Defender product because of naming confusion
Jump To
Is Microsoft Defender free?
Yes for some Defender products, no for others. Microsoft Defender Antivirus is built into Windows 10 and Windows 11, so the antivirus layer is included with the operating system. But the Microsoft Defender app for individuals is tied to a qualifying Microsoft 365 Personal, Family, or Premium subscription, and Microsoft Defender for Endpoint is a paid business product that Microsoft currently markets with a free trial rather than as a free service.
That is the big distinction most buyers miss: "Microsoft Defender" is not one thing. It is a product family.
Direct answer: Microsoft Defender Antivirus is free in the sense that it is included with supported Windows devices.
Direct answer: The Microsoft Defender app for individuals is not a free standalone product; Microsoft's current consumer page says a Microsoft 365 Personal, Family, or Premium subscription is required.
Direct answer: Defender for Endpoint is not free. Microsoft's business page positions it as a paid endpoint security product and promotes a free trial.
If you first need the broader product map, start with the full Microsoft Defender versions comparison.
Quick answer by product
The fastest way to answer the price question is to name the exact Defender product.
| Product or feature | What it means | Free, included, or paid? |
|---|---|---|
| Microsoft Defender Antivirus | The built-in Windows antivirus engine managed through Windows Security | Included with supported Windows devices |
| Windows Security app | The local Windows interface for antivirus, firewall, SmartScreen, protection history, and related status | Included with Windows |
| Microsoft Defender app for individuals | Consumer cross-device security app for Windows, Mac, Android, and iOS | Included with a qualifying Microsoft 365 Personal, Family, or Premium subscription |
| Microsoft Defender for Endpoint or Defender for Business | Business endpoint security and operations products | Paid business products, even when a trial is available |
| Microsoft Defender XDR | Cross-domain business security and incident experience | Tied to eligible business or enterprise licensing, not a free standalone app |
What is included for free in Windows
The free part most people mean is Microsoft Defender Antivirus. Microsoft's Windows security page says it is a next-generation protection solution that comes with Windows 11 and provides always-on antivirus protection. In practice, that is the built-in antivirus engine many people still informally call Windows Defender.
What is typically included with Windows:
- Microsoft Defender Antivirus
- Windows Security as the local security interface
- Microsoft Defender SmartScreen
- Windows Firewall
That does not mean every product with Defender in the name is free. It means core Windows endpoint protection is already there on supported Windows systems. The separate Microsoft Defender app for individuals is a different product path and is attached to Microsoft 365 Personal, Family, or Premium subscriptions.
This is also why queries like is Windows Defender free, is Windows Defender Antivirus free, and is Defender free with Windows 11 are usually asking about the built-in antivirus engine. For that narrow question, the answer is yes.
What Defender products are paid or trial-based
The paid side of the Defender family is where most confusion starts. Microsoft uses the same naming umbrella across business security tools, Microsoft 365-linked consumer tools, and Windows-native protection.
| Defender name | What it is | Free, included, or paid? |
|---|---|---|
| Microsoft Defender Antivirus | Built-in Windows antivirus engine | Included with Windows |
| Windows Security | Windows security interface and status center | Included with Windows |
| Microsoft Defender app for individuals | Cross-device consumer security app | Requires Microsoft 365 Personal, Family, or Premium subscription |
| Microsoft Defender for Endpoint | Business endpoint security platform | Paid business product with free trial availability |
| Microsoft Defender XDR / Microsoft 365 Defender layer | Cross-workload business security and incident experience | Included only through eligible business or enterprise licensing, not free standalone |
Microsoft's current consumer guidance says the Microsoft Defender app is included with Microsoft 365 Personal or Family subscriptions. Microsoft's business pages may offer free trials for Defender products, but a trial is not the same as a free product. Treat business Defender services as paid unless your licensing agreement explicitly includes them.
If you are comparing consumer and business Mac coverage specifically, use the macOS Defender pricing guide.
Microsoft Defender free vs paid
The cleanest way to think about Microsoft Defender free vs paid is by buyer type:
- Windows users: You already have Defender Antivirus built into Windows.
- Microsoft 365 Personal or Family subscribers: You may have access to the Microsoft Defender app for individual and family protection, but that access comes through the subscription, not as a standalone free product.
- Business buyers: Defender for Endpoint, Defender for Business, and broader Defender suites are paid security services even when a trial is available.
That means "free" can mean one of three different things:
- included with Windows
- included with another subscription you are already paying for
- temporarily available as a trial
Those are not the same commercial answer. Many buying mistakes happen because people treat them as interchangeable.
Common confusion around Microsoft Defender naming
The naming confusion is real because Microsoft's official pages describe three different layers using similar language:
- the built-in Windows security stack
- the separate Microsoft Defender app for consumers
- business endpoint and XDR products such as Defender for Endpoint
The most common misunderstandings are:
- assuming the consumer Microsoft Defender app is free just because Defender Antivirus is built into Windows
- assuming Defender for Endpoint is free because Microsoft shows a free trial
- assuming Microsoft 365 Defender is a consumer product because the name includes Microsoft 365
- using "Windows Defender" and "Microsoft Defender" as if they always mean the same product
Microsoft's consumer page also makes the distinction explicit: the Microsoft Defender app is a cross-device app for individuals and families, while Windows Security is security built into Windows. That is the cleanest official way to explain the difference.
For business operators, the practical question is not just which product is free. It is which product gives you centralized visibility, alerting, and reporting across endpoints. If that is the real problem, continue with the Windows Defender central management guide or the Defender reporting basics page.