Cal.com

Cal.com is an open-source scheduling and appointment booking platform often compared to Calendly. It lets individuals and teams publish booking pages, define availability rules, and manage confirmations and notifications, with strong customization and API-first extensibility.

Key Features

• Public booking pages and shareable booking links
• Availability management with buffers and daily/weekly/monthly limits
• Booking confirmations, rescheduling flows, and calendar event creation
• Automated reminders and follow-ups via email and SMS (via integrations)
• Team scheduling capabilities and admin controls for organizations
• API-driven architecture designed for embedding and white-label deployments

Use Cases

• Personal and team appointment scheduling (sales calls, interviews, office hours)
• Service-based bookings (consultations, classes, sessions)
• Building a custom scheduling product on top of a self-hosted platform

Cal.com is well suited for organizations that want control over scheduling workflows, branding, and data. It provides a modern web stack and an extensible foundation for building scheduling experiences for both internal teams and external customers.