Cal.com — #1 Alternative to Calendly
Open-source scheduling infrastructure for individuals, round-robin teams, and marketplaces
Supports Google, Outlook, Apple iCloud, and CalDAV calendars with round-robin routing forms, Stripe payments, SMS workflows, and `@calcom/atoms` React embeds.
License: AGPL-3.0 · Pricing: Open Core · Compare all Calendly alternatives · Official Website