Cal.diy is the MIT-licensed community edition of Cal.com, built on Next.js, Prisma, and Postgres. It strips out SSO, organizations, and other enterprise tools to provide a pure open-source scheduling stack. You run the entire infrastructure on your own hardware without needing a license key or external account.
It is only worth your time if you have specific infrastructure needs that commercial Cal.com cannot meet. The project explicitly warns against production use, citing the lack of official support and the requirement for advanced server administration. If you just need standard scheduling for a team, the commercial version is the safer bet.
more: https://github.com/calcom/cal.diy
my other side: ivo.blogspot.com
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