Cal.diy

Judgement

What it is

Complete system

What it does

Cal.diy, the fully MIT-licensed community edition of Cal.com for booking pages and scheduling, with enterprise features removed.

Adopt it when

You want to self-host personal booking links without a Cal.com licence and can run Next.js with Postgres.

Watch out

Teams, workflows, SSO and other enterprise features are removed, and the project itself recommends it only for personal, non-production use.

Ready for

Usable

Runs as

Self-hosted server

Built with

TypeScript, Next.js, Prisma, tRPC and PostgreSQL

How established

Established: started 5 years ago, latest release v6.2.0.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Compare Cal.diy

Built from

Follow it down: Cal.diy → TypeScript → Go → runs on a microchip

How compilers were built, back to punched paper tape

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