How to Build Your Own Cal.com
Replace Cal.com with a custom build. Open source scheduling infrastructure for everyone.
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 44 features at Weekend Project difficulty, expect about One weekend with AI-assisted development.
Recommended Tech Stack
Full-stack React framework with API routes and server components
PostgreSQL database, auth, and real-time subscriptions
Utility-first styling for rapid UI development
Key Features to Replicate
Top features across 8 categories. See all 44 features
Integration(6 features)
Full REST API for custom integrations and automations.
Keep availability in sync across multiple calendar sources.
Sync with Google Calendar, Outlook, and other calendar providers.
Embed scheduling directly into your website.
Send real-time booking data to external applications.
+1 more in this category
Admin(5 features)
Centralized view of all team bookings and settings.
Import and manage multiple bookings at once.
Manage multiple calendar accounts simultaneously.
See all team members' availability in one view.
Manage multiple team members and their availability.
Customization(5 features)
Send branded confirmation and reminder emails.
Show or hide form fields based on user responses.
White-label booking pages with your own branding.
Use your own domain for booking pages.
Add custom questions to booking forms for gathering information.
Scheduling(3 features)
Set complex scheduling rules and buffer times between meetings.
Set maximum daily, weekly, or monthly bookings.
Create repeating booking slots for regular appointments.
Security(3 features)
Control what information guests see and can modify.
Control team member permissions and access levels.
Secure accounts with 2FA support.
AI(2 features)
AI-powered meeting time suggestions based on availability.
AI intelligently routes bookings to available team members.
Communication(2 features)
Automatic recording integration with video conferencing.
Built-in video conferencing with Zoom, Google Meet, or Microsoft Teams.
Notifications(2 features)
Send email and SMS reminders to attendees before meetings.
Customizable confirmation emails for all bookings.
Cost Calculator
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Build It Yourself
Total Cost Comparison
DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 44 features at very easy complexity.