Cal.com vs Microsoft 365: pricing, plans, and positioning compared

Verified pricing and side-by-side plan structures. Updated daily.

Side-by-side comparison

	Cal.com Productivity	Microsoft 365 Productivity
Entry price	$15/mo	$8.4/mo
Annual discount	−20%	−17%
Free plan	Yes	—
Number of tiers	4	4
Positioning	Open-source scheduling platform positioned as the alternative to Calendly for teams that want self-hosting, white-label options, or embedded scheduling in their own product. Distinctive for API-first design that lets developers embed scheduling anywhere. YC-backed (W22). Priced free (open source) up to $75/user/mo Enterprise. Popular with developer tools, healthcare apps, and enterprises with data residency requirements Calendly can't meet.	Microsoft's productivity suite combining Office apps (Word, Excel, PowerPoint, Outlook) with Teams collaboration, OneDrive storage, and SharePoint. Four business plans: Apps for Business ($10/user), Business Basic ($7/user), Business Standard ($14), and Business Premium ($22, unchanged). List prices increased July 1, 2026 (Basic +16%, Standard +12%, Apps +21%). Copilot Chat now bundled into all business tiers — buyers pay for AI they didn't opt into. The dominant enterprise productivity platform, deeply integrated into Windows environments.
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