Email and calendar app included with Microsoft 365.
Calendar sharing and Scheduling Assistant alone save hours weekly. Tied to Microsoft 365 subscription.
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Source: Microsoft Outlook·Verified March 2026
Most widely used business email client — works with everything
Deep calendar integration with Teams, SharePoint, and M365
Robust search, filtering, and rules for high email volumes
Free personal version at outlook.com
Requires Microsoft 365 subscription — cannot buy standalone for business
Desktop app can feel heavy and slow
Interface packed with many features — can feel cluttered
Some security features rolling out mid-2026
Copilot Chat drafts emails, summarizes threads, catches you up on missed conversations, manages calendar via natural language, suggests meeting times, prioritizes inbox, generates responses. Rolling out across M365 plans in 2026.
Source: Microsoft Outlook·Verified March 2026
Last researched: March 2026
