calcom/cal.diy
Scheduling infrastructure for absolutely everyone.
Open source alternative to Calendly
cal.diy is an open source TypeScript project by calcom, created in March 2021. It has 49,200 stars and 15,398 forks on GitHub and is released under the MIT license. Its most recent commit was on Oct 19, 2026, and it has 1,157 open issues. Its GitHub topics include open-source, typescript, nextjs, and next-auth.
49,200 stars today
The chart fills in as we take a snapshot every day.
