Rallly vs SabreDAV
| Tagline | Self-hosted scheduling polls to find the best time for a group to meet | Open-source CardDAV, CalDAV, and WebDAV framework for PHP |
| Category | Scheduling & Booking | Scheduling & Booking |
| Replaces | Calendly | Calendly, Acuity Scheduling |
| GitHub stars | 5.1k | 1.7k |
| Language | TypeScript | PHP |
| License | AGPL-3.0 | MIT |
| Self-host difficulty | 3/5 Moderate | 5/5 Advanced |
| Deploy options | One-Click Docker Docker Compose Manual | Manual |
| Managed hosting | ||
| Last updated | today | 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.
Rallly
- Focused on group availability polling rather than one-on-one booking pages, so it does not replace Calendly's personal booking links.
- No direct calendar-availability checking or two-way calendar sync to auto-block busy times.
- No built-in payment collection or paid-appointment support.
- Requires PostgreSQL and SMTP configuration to self-host; not a single-binary deploy.
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 Rallly if you want the lower-effort setup; choose Rallly for the larger community and ecosystem. Rallly has seen more recent development. Open each guide below for deploy steps and the full feature gap.