Cal.com

Open-source scheduling infrastructure with unlimited calendar connections

Open Source

Free plan with no usage limits. Teams plan at $15/user/month. Self-hosting is free.

open-source scheduling calendar booking self-hosted

About Cal.com

Cal.com is the leading open-source scheduling platform, providing a powerful alternative to Calendly with 99% of its codebase open under AGPLv3. Features include unlimited calendar connections, round-robin and group scheduling, workflow automation, and integrations with Google Calendar, Office 365, and Zoom. The free plan has no usage limits; team plans start at $15/user/month.

Highlights

  • ✓ Free plan with unlimited calendar connections and event types
  • ✓ Round-robin scheduling, group meetings, and workflow automation
  • ✓ 99% open-source with self-hosting option to eliminate costs

Limitations

  • ✗ Team collaboration features require paid plan on hosted version
  • ✗ Self-hosting requires managing servers, updates, and security
  • ✗ HIPAA compliance and SSO only on Organizations plan

Replaces

Calendly Free (1 event type)
View alternatives →
Acuity Scheduling $20/mo Emerging
View alternatives →

Detailed Comparisons

Calendly vs Cal.com → Acuity Scheduling vs Cal.com →

Free

Free plan with no usage limits. Teams plan at $15/user/month. Self-hosting is free.

Visit Cal.com →

Last updated: 2026-03-01