Cal.diy: open-source community edition of cal.com

Cal.com just launched Cal.diy, a fully open, community-run version of its calendar app — MIT license, no paywall, and all the business-only features (like Teams and single sign-on) stripped out. It’s self-host only, with a big red label saying it’s for personal, non‑production use, not a managed service. One commenter even shared an email saying, “we will no longer provide public Docker images,” and “please do not use Cal.diy — it’s not intended for enterprise use,” adding fuel to the fire. Repo’s here: github.com/calcom/cal.diy.

The community reaction? Pure chaos and popcorn. Long‑timers like bluehatbrit asked if this is just the same open version with a new paint job. Critics called it a strategic retreat from serious, on‑prem business installs, with FlamingMoe calling it a “180” from last year’s blog vibes about on‑prem being more secure. Others, like OsrsNeedsf2P, think Cal.com launched Cal.diy to stay ahead of a community fork. Meanwhile, devs like swyx are hunting for simpler, cleaner alternatives—proof that “just schedule a meeting” still causes a meeting. Memes rolled in fast: “DIY now means Don’t Install Yet,” “Open source, some assembly required,” and “No Docker? Guess we’re really building character.” In short: big release, bigger feelings, maximum drama.