Open scheduling infrastructure: booking links, team routing, and round-robin. Use hosted Cal.com or self-host the open source community edition, Cal.diy.
Cal.com is an open source alternative to Calendly. Open scheduling infrastructure: booking links, team routing, and round-robin. Use hosted Cal.com or self-host the open source community edition, Cal.diy. MIT licensed, 46.5k GitHub stars, hosted version available, self-host with Docker, and last released 2026-03-01.
Should you switch?
Individuals and teams who want scheduling infrastructure they fully control: shareable booking links, team round-robin, and event types, with the option to use the managed cal.com platform or self-host the community edition.
You need enterprise features (teams, organizations, SSO/SAML, workflows, insights) out of the box without a Cal.com paid plan: the community edition (Cal.diy) removes all enterprise and commercial code by design.
The repository is MIT-licensed but Cal.com is open-core: teams, organizations, SSO, and enterprise workflows live in the closed commercial tier, not in the community edition. Self-hosting Cal.diy requires Docker, PostgreSQL, and manual generation of secret keys (NEXTAUTH_SECRET, CALENDSO_ENCRYPTION_KEY); the README explicitly warns this is intended for personal, non-production use and requires advanced server administration knowledge.
In the product
Community proof
"Look at apps like Cal.com compared to Calendly and you'll see it's light years ahead and you can self-host with 1 click."
"I'm personally using Cal.com, it's free and I'm very happy."
Maintenance health
Can you do it today?
docker compose up -dGitHub
Support the creator
No public funding page yet.
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