Cal.com vs Microsoft 365 — Pricing, Plans, and Verified Costs (2026)
Cal.com starts at $15/mo. Microsoft 365 starts at $8.4/mo. Microsoft 365 is $6.6/mo cheaper on the entry tier than Cal.com.
See price history: Cal.com · Microsoft 365
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.
All plans compared
| Tier role | Plan | Cal.com monthly | Cal.com annual | Microsoft 365 monthly | Microsoft 365 annual |
|---|---|---|---|---|---|
| Free / starter | Free / — | Free | Free | — | — |
| Entry paid | Organizations / Apps for Business | $37 | $28 | $10 | $10 |
| Mid tier | — / Business Standard | — | — | $16.8 | $14 |
| Pro / power | — / Business Premium | — | — | $26.4 | $22 |
| Teams | Teams / Business Basic | $15 | $12 | $8.4 | $7 |
| Enterprise | Enterprise / — | Custom | Custom | — | — |
Tier names differ across vendors. Rows are aligned by tier role, not name. Full tier structures on each tool's page.
What each is best for
Cal.com is worth it if… com is the open-source Calendly alternative for developers, agencies, and teams that want scheduling under their own domain with unlimited customization. Free covers solo users; Teams adds routing forms and workflows.
Microsoft 365 is worth it if… Microsoft 365 Business is worth it for teams that need full Office desktop apps (Word, Excel, PowerPoint, Outlook) + email + Teams + SharePoint + OneDrive — particularly if you have Windows-heavy workforce or compliance requirements. Apps for Business covers desktop apps only; Business Standard adds Teams, SharePoint, and email; Business Premium adds Intune device management and Azure AD.
Bottom line: Similar positioning, closer to a preference call than a strategic one.
Choose Cal.com over Microsoft 365 if…
Choose Cal.com if…
- You want fixed-price predictability (per seat, from $15/mo).
- You match the profile Cal.com is built for: Cal.
- You're building for healthcare.
Choose Microsoft 365 if…
- You want fixed-price predictability (per seat, from $8.4/mo).
- You match the profile Microsoft 365 is built for: Microsoft 365 Business is worth it for teams that need full Office desktop apps (Word, Excel, PowerPoint, Outlook) + email + Teams + SharePoint + OneDrive — particularly if you have Windows-heavy workforce or compliance requirements.
- You need a general-purpose productivity option rather than a vertical-specific one.
At a glance
| Cal.com | Microsoft 365 | |
|---|---|---|
| Free plan | Yes | No |
| Entry price | $15/mo | $8.4/mo |
| Enterprise available | Yes | Yes |
| Pricing model | Per Seat | Per Seat |
| Last verified | September 19, 2026 | September 10, 2026 |
| Full pricing | View full pricing | View full pricing |
Pricing last verified September 19, 2026. Tracked daily.
Frequently asked questions
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Common questions about Cal.com and Microsoft 365
- How much does Cal.com cost in 2026?
- Does Cal.com have a free plan?
- How often does Cal.com change prices?
- What are the best Cal.com alternatives in 2026?
- How much does Microsoft 365 cost in 2026?
- Does Microsoft 365 have a free plan?
- How often does Microsoft 365 change prices?
- What are the best Microsoft 365 alternatives in 2026?