Cal-Book

The premium Open Source alternative to Calendly

🎯 Best for:Developers who want a customizable scheduling engine they can host themselves.
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What is Cal-Book?

A self-hosted booking platform optimized for deployment on Fly.io or local servers. It focuses on data sovereignty and zero-cost scheduling for individual users and small teams.

Tech Stack
PythonCalendar & Scheduling

Why Cal-Book?

  • Fly.io optimized
  • No user limits
  • Clean TypeScript codebase

Limitations

  • Requires cloud hosting knowledge
  • Basic feature set
  • No mobile app
5/5/2026
Last Update
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Forks
0
Issues
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License
Financial Leak Detected

Stop the "SaaS Tax"

Your team could be burning cash. Switching to Cal-Book instantly boosts your runway.

Competitor Cost
-$1,440
/ year (est. based on Calendly)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%

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