Cal.diy

Cal.diy is the community-driven, open-source scheduling platform, a fork of Cal.com with all enterprise and commercial code removed. It lets individuals and self-hosters book meetings and manage scheduling on their own infrastructure, with full control and no commercial dependencies.

It is built with Next.js, tRPC, React, Tailwind CSS, Prisma, and Daily.co, backed by PostgreSQL 13 or newer. It can run with Docker and Docker Compose, and it drops enterprise-only features such as Teams, Organizations, Insights, Workflows, and SSO/SAML. No license key or Cal.com account is required.

Cal.diy is 100% MIT-licensed and community-maintained, intended for personal, non-production use. There is no hosted version for this edition, so you run it yourself; for commercial and enterprise-ready scheduling, Cal.com offers a hosted and on-prem product.