CalDAV calendar with booking built into Nextcloud
Open Source
Self-Hostable
No Logs
Cal.com
Open source Calendly alternative
Open Source
Self-Hostable
No Logs
Free / $12/user/mo
Free tier includes unlimited bookings. Team features from $12/user/month. Self-hosted is free.
Quick Specs
| Open Source | ✓ Yes View code |
|---|---|
| E2E Encrypted | ✗ No |
| Zero Knowledge | ✗ No |
| Self-Hostable | ✓ Yes |
| No Logs Policy | ✓ Yes |
| Audited | ✗ No |
| Jurisdiction | United States |
| Pricing | Freemium |
About Cal.com
Scheduling infrastructure that you can self-host. Clients book time on your calendar without back-and-forth emails. Integrates with Google Calendar, Outlook, and others. White-label for your brand.
Best For
Organizations wanting booking pages without sending data to Calendly
Security Considerations
A tool is only as effective as its implementation. Consider these factors:
- Configuration matters: Default settings may not match your threat model. Review security options carefully.
- Training is essential: Tools protect nothing if your team doesn't use them correctly or consistently.
- Integration points: Consider how this tool connects with your existing systems and what data flows between them.
- Continuity planning: Ensure you have backup access methods and know the recovery process.
Need help implementing this securely? Take our free assessment or book a discovery call.