Compare software

iCloud Mail vs Microsoft Outlook: catalog facts
iCloud Mail	Microsoft Outlook
Freemium Free with an Apple Account, with more storage on paid iCloud+ plans.	Freemium Free app and account available; Microsoft 365 plans add paid features and Office apps.
macOS, iOS, Web	Windows, macOS, Android, iOS, Web
Built into Apple devices Web client for use on any computer	Email, calendar and contacts for multiple accounts in one app Available on desktop, mobile and web
Requires an Apple Account Best experience is on Apple hardware	Closed source and tied to Microsoft services Some features, including Copilot, require a paid plan
Web application, Hosted service	Downloadable app, Web application
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 24, 2026	Official website Full listing and sources Checked September 23, 2026

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