Cal-Book
The premium Open Source alternative to Calendly
🎯 Best for:Developers who want a customizable scheduling engine they can host themselves.
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
0
Forks
0
Issues
Unknown
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%