Cal.diy
Online appointment scheduling system.
- Booking & Scheduling
- TypeScript
- MIT
- Docker
- Actively maintained
GitHub stats
- GitHub stars
- 48,880
- Forks
- 15,289
- Open issues
- 1,142
- Commits, last 12 months
- 1,893
- Last commit
- Sep 26, 2026
- Latest release
- v6.2.0Mar 1, 2026
- Created
- Mar 22, 2021
- License
- MITOpen source
Data from the GitHub API, refreshed daily.
About Cal.diy
Online appointment scheduling system. Cal.diy is open source under the MIT license and written mainly in TypeScript, so you can read the code, run it on your own hardware and keep full control of your data.
The project has 48,880 stars and 15,289 forks on GitHub, with 1,893 commits over the last year. It ships a Docker image, which makes it a good fit for a small VPS or a home server running Docker Compose.
Topics
- open-source
- typescript
- nextjs
- next-auth
- postgresql
- prisma
- t3-stack
- tailwindcss
- trpc
- turborepo
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What is Cal.diy?
Cal.diy is a free, open-source app you can host on your own server, listed in our Booking & Scheduling category. Online appointment scheduling system. The source code lives at github.com/calcom/cal.diy, where it has 48,880 stars.
Is Cal.diy free and open source?
Yes. Cal.diy is open-source software released under the MIT license, so you can self-host it at no cost. You only pay for the server it runs on, and some projects also offer an optional paid cloud plan.
Can I run Cal.diy with Docker?
Yes. Cal.diy provides a Docker image, so you can run it on any Linux server with Docker and Docker Compose installed. The project README lists the image name and the environment variables to set.
What are the best alternatives to Cal.diy?
Popular self-hosted alternatives to Cal.diy include QloApps, Rallly and Easy!Appointments. Cal.diy itself is a self-hosted alternative to Calendly.
Is Cal.diy actively maintained?
The most recent commit to Cal.diy was on Sep 26, 2026 with 1,893 commits in the past twelve months. The latest release is v6.2.0, published Mar 1, 2026. Check the open issues on GitHub to gauge how quickly maintainers respond.