# Microsoft Defender Antivirus: how AI models rank it, October 2026

IT AI Recommendation Index, October 2026 Edition. Named in 2 judge labels across 1 categories by 2 of 14 models. Page: https://it-ai-index.com/vendors/microsoft-defender-antivirus/

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| Client-side protection | 2% | 15 | 0% | 2 |

## What the models said for it

- "the built-in Microsoft Defender Antivirus (included with Windows at no extra cost) is often the best starting point" (Grok 4.1 Fast, Client-side protection)
- "Best free/basic protection: Microsoft Defender Antivirus on Windows" (GPT-5.4 mini, Client-side protection)

## In its own words

What Microsoft Defender Antivirus's own pages state, read 2026-10-06. Stated by the vendor, not checked by the index.

- Positioning: Професионална, винаги включена защита за вас и данните и устройствата на вашето семейство – за работа или личен живот. (https://www.microsoft.com/bg-bg/microsoft-365/microsoft-defender-for-individuals)
- For: individuals and families (https://www.microsoft.com/bg-bg/microsoft-365/microsoft-defender-for-individuals)
- Price stated: Microsoft 365 Personal 99,99 € /година; Microsoft 365 Family 124,99 € /година; Microsoft 365 Premium 209,99 € /година (https://www.microsoft.com/bg-bg/microsoft-365/microsoft-defender-for-individuals)
- Starting price: 99,99 € (https://www.microsoft.com/bg-bg/microsoft-365/microsoft-defender-for-individuals)
- Free plan or trial: Изпробвайте безплатно (https://www.microsoft.com/bg-bg/microsoft-365/microsoft-defender-for-individuals)
- Customers named: COFCO International

## Record

- Method: https://it-ai-index.com/methodology/
- Raw judge labels and full responses: https://it-ai-index.com/data/
- License: CC BY 4.0. Cite as IT AI Recommendation Index, October 2026 Edition, it-ai-index.com.