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Microsoft Outlook vs Zoho Calendar: catalog facts
Microsoft Outlook	Zoho Calendar
Freemium Free app and account available; Microsoft 365 plans add paid features and Office apps.	Freemium Free to start, with paid Zoho plans for business features.
Windows, macOS, Android, iOS, Web	Web
Email, calendar and contacts for multiple accounts in one app Available on desktop, mobile and web	Team calendars with availability checks Built-in appointment and resource booking
Closed source and tied to Microsoft services Some features, including Copilot, require a paid plan	Hosted service, with data stored by Zoho Most useful inside the wider Zoho ecosystem
Downloadable app, Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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 October 2, 2026

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