calcom/cal.diy
Editor-reviewedScheduling infrastructure for absolutely everyone.
- Stars
- 49.7k
- Forks
- 15.5k
- Language
- TypeScript
- License
- MIT
- Last commit
- updated Nov 2026
Why founders care
Removes a per-seat scheduling subscription, and because the booking flow is embeddable you can keep users inside your own onboarding instead of sending them to a third-party domain.
Pros
- The booking flow is embeddable, not just a hosted link page
- MIT licensed
- Handles timezones and recurring availability, which are tedious to build yourself
Cons
- Large monorepo; self-hosting needs PostgreSQL and a fair amount of environment configuration
- The feature surface is broad, so first setup takes longer than a single-purpose tool
Alternatives
Calendly, SavvyCal
Maintenance
Pushed within three months of the last stats read (as of Nov 6, 2026).
Licence
MIT
Tech stack
Primary language: TypeScript. GitHub reports only the dominant language, so this is not the whole stack.
Install
git clone --recursive, cp .env.example .env, then docker compose up -d
Quality score
Computed with the same formula the discovery import uses, so this entry can be compared with imported ones.
- Recent activity×0.30
- 1.00
How recently the default branch was pushed to.
- Adoption×0.20
- 1.00
Stars on a log scale, so adoption counts without dominating.
- Description and topics×0.15
- 1.00
Whether the repo describes itself: description, topics, homepage.
- README present×0.15
- 1.00
Whether the repository has a README at all.
- Licence clarity×0.10
- 1.00
Whether GitHub can resolve the licence to a recognised SPDX id.
- Issue health×0.10
- 0.80
Open issues relative to adoption, as a rough maintenance signal.
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Stats updated Nov 6, 2026. Stars, forks, issue counts, and dates are a snapshot read from the GitHub REST API, not a live figure. This site makes no requests to GitHub when you load a page.