caldera

The premium Open Source alternative to Cronofy

🎯 Best for:Developers building scheduling features who need to avoid third-party data processing.

What is caldera?

A self-hostable REST API that unifies Google, Outlook, and iCloud calendars into a single interface. It eliminates the need for proprietary middleware by providing direct synchronization with major calendar providers.

Tech Stack
TypeScriptAutomation & Workflow

Why caldera?

  • Multi-provider support
  • Self-hostable architecture
  • Standardized REST API

Limitations

  • Complex OAuth configuration
  • Requires ongoing API maintenance
  • No managed cloud version
4/18/2026
Last Update
0
Forks
0
Issues
Other
License
Financial Leak Detected

Stop the "SaaS Tax"

Your team could be burning cash. Switching to caldera instantly boosts your runway.

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

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