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Microsoft Defender vs Norton 360: catalog facts
Microsoft Defender	Norton 360
Paid Included with a paid Microsoft 365 subscription, with a free trial available.	Paid Sold as subscription plans with renewals.
Windows, macOS, Android, iOS	Windows, macOS, Android, iOS
Manages security for several family members and devices from one dashboard Dark web monitoring for more than 60 types of personal information	Antivirus, VPN and identity protection in one subscription Includes AI-based scam detection
Requires a Microsoft account and a Microsoft 365 subscription Closed source, with protection tied to Microsoft's cloud services	Paid subscription with no free tier shown Requires a Norton account to download
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.