[GitHub Trending] calcom/cal.diy
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Cal.diy is a community-maintained, MIT-licensed fork of Cal.com that removes all enterprise features (Teams, SSO, Insights) and license key requirements. Built with Next.js, tRPC, Prisma, and Daily.co, it requires self-hosting on Node.js >=18.x and PostgreSQL >=13.x, but is explicitly recommended for personal, non-production use only. The project offers full control over scheduling infrastructure without commercial dependencies, though it demands advanced server administration skills.
Use Cal.diy for personal or experimental scheduling setups, but rely on Cal.com's hosted or enterprise edition for production-grade infrastructure.
For a senior engineer evaluating open-source scheduling tools, Cal.diy provides a clean, as a clean MIT fork of Cal.com, enables self-hosted prototyping without vendor lock-in, but its non-production warning means it's not suitable for enterprise or agent orchestration workflows.