Cal.diy vs SabreDAV
| Tagline | Open-source online appointment scheduling built on Cal.com | Open-source CardDAV, CalDAV, and WebDAV framework for PHP |
| Category | Scheduling & Booking | Scheduling & Booking |
| Replaces | Calendly, Acuity Scheduling | Calendly, Acuity Scheduling |
| GitHub stars | 46k | 1.7k |
| Language | Nodejs | PHP |
| License | MIT | MIT |
| Self-host difficulty | 3/5 Moderate | 5/5 Advanced |
| Deploy options | Docker Docker Compose Manual | Manual |
| Managed hosting | ||
| Last updated | 2 days ago | 3 days ago |
| View repo | View repo |
Where each falls short
The honest trade-offs — what you give up with each, versus the proprietary tools they replace.
Cal.diy
- Self-hosted setup requires configuring PostgreSQL, email/SMTP, and OAuth providers
- Enterprise features (SAML SSO, workflows at scale, analytics) are cloud-only or require an enterprise license
- Payment collection integrations need additional third-party setup
- Admin UI for multi-tenant management is less polished than Calendly's hosted offering
SabreDAV
- A developer framework, not an end-user product; requires significant custom PHP development
- No admin UI, booking pages, or user-facing features out of the box
- Documentation assumes solid PHP and WebDAV protocol knowledge
- Not a drop-in replacement for any SaaS scheduling tool without substantial build effort
Bottom line
Choose Cal.diy if you want the lower-effort setup; choose Cal.diy for the larger community and ecosystem. Cal.diy has seen more recent development. Open each guide below for deploy steps and the full feature gap.