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Cal.com

Editorial comparison for operators. Ratings are sample data unless verified.

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  3. Cal.com

This comparison puts Cal.com side by side for operators evaluating them in 2026 — pricing model, free access, API availability, and editorial fit. Both compete in Scheduling & Calendar, so the decision usually comes down to pricing model, integrations, and how each fits an existing workflow. Treat ratings and pricing as directional and confirm current details on each vendor's site before committing.

AttributeCal.com
Type
tool
SummaryOpen source scheduling that doesn't lock you into a vendor. Host it yourself, own the data, customize everything.
Pricingfreemium · See vendor site
Free trialNo / not listed
APIYes
Open sourceYes
Editor rating—
CategoriesScheduling & Calendar, Productivity, Infrastructure & Hosting
Key featuresSelf-host or use managed cloud—your choice of infrastructure · Open source codebase: customize workflows, integrations, and UI without vendor approval · Multi-calendar sync: Google Calendar, Outlook, CalDAV, and custom calendar systems · Branded booking links and embedded scheduling widgets · Team availability management with complex scheduling rules and buffer times
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Cal.com