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Microsoft Defender vs Malwarebytes: catalog facts
Microsoft Defender	Malwarebytes
Paid Included with a paid Microsoft 365 subscription, with a free trial available.	Freemium A free scanner is available; real-time protection, VPN and scam detection are part of paid…
Windows, macOS, Android, iOS	Windows, macOS, Android, iOS, Browser extension
Manages security for several family members and devices from one dashboard Dark web monitoring for more than 60 types of personal information	Available on Windows, macOS, Android and iOS Combines malware scanning, VPN and scam detection
Requires a Microsoft account and a Microsoft 365 subscription Closed source, with protection tied to Microsoft's cloud services	Most protection features require a paid plan Closed source
Downloadable app	Downloadable app, Browser extension
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is 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.