Open scheduling infrastructure: booking links, team routing, and round-robin. Use hosted Cal.com or self-host the open source community edition, Cal.diy.
You pay for Calendly
There is an open source for Calendly
2 reviewed open source alternatives to Calendly. Each carries a source and a date. Pick the one that fits how you work.
Self-hosted appointment scheduling for service businesses: booking pages, provider calendars, Google Calendar sync, and REST API on your own server.
"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."
"EasyAppointments (https://github.com/alextselegidis/easyappointments) is still FOSS. We managed our team calendars on it at a previous company, but I rolled out Cal.com due to more apparent support and sophistication at my current company. Turns out most of that sophistication turned out to be bloat: we saw successive version releases add features we didn't care about while increasingly putting previously open features, like team calendars, behind a paywall. This move by Cal.com seems to be transparently an attempt to maintain that paywall against users who'd otherwise just use LLMs to remove it. I guess it's back to EasyAppointments, which still seems to work just fine."
| Project | License | Stars | Last release | Hosted | Docker | Zero terminal | Install path |
|---|---|---|---|---|---|---|---|
| Cal.com | MIT | 47.4k | 2026-03-01 | Yes | Yes | Yes | Install path |
| Easy!Appointments | GPL-3.0 | 4.3k | 2026-05-27 | No | Yes | No | Install path |