US · United States
Free (individual) · Self-host free · Teams from $12/user/mo
Cal.com
Replaces: Calendly, Google Calendar
Open-source scheduling infrastructure that replaces Calendly with custom workflows, round-robin booking, and self-hosting.
The Catch (read before switching): Self-hosting requires a Node/Postgres setup and manual upgrades; team features on cloud are $12/user/mo.
Hard Constraints Checklist
- Open SourceYes
- Self-HostableYes
- Permanent Free TierYes
- Headquartered Outside USNo
- Zero Tracking / E2EEYes