Cal.diy

The platform provides a web‑based interface for creating and managing appointment slots, allowing users to define event types, recurring schedules, and availability rules such as buffers, minimum notice, and out‑of‑office periods. Bookings can be linked to private URLs and support paid sessions through Stripe or PayPal integration. Calendar synchronization with services like Google Calendar is included, and the system tracks bookings for individual users.

It is aimed at individuals or small teams who wish to run their own scheduling service without relying on a hosted provider. Because the software is self‑hosted, users must handle server setup, database configuration, and security themselves, making it suitable for those with experience in system administration and comfortable managing their own infrastructure.

What distinguishes this edition is that it is a fully open‑source, MIT‑licensed fork that removes all commercial and enterprise‑only features such as team management, SSO, and analytics. There is no hosted version; the codebase is community‑maintained, and all functionality works out of the box without license keys or external accounts.