Cal.diy vs Fider
| Tagline | Open-source online appointment scheduling built on Cal.com | Open platform to collect, vote on, and prioritise user feedback |
| Category | Scheduling & Booking | Scheduling & Booking |
| Replaces | Calendly, Acuity Scheduling | Calendly, Acuity Scheduling |
| GitHub stars | 46k | 4.4k |
| Language | Nodejs | Docker |
| License | MIT | MIT |
| Self-host difficulty | 3/5 Moderate | 3/5 Moderate |
| Deploy options | Docker Docker Compose Manual | Docker Docker Compose Manual |
| Managed hosting | ||
| Last updated | 2 days ago | today |
| 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
Fider
- categorySlug is 'scheduling' but Fider is a feedback/voting tool; replaces options are limited to scheduling slugs in the ref
- No roadmap visualisation or timeline planning built in
- Integrations with Jira, Linear, or Slack require custom webhooks
- No in-app surveys or NPS measurement
Bottom line
Both are a similar lift to self-host; choose Cal.diy for the larger community and ecosystem. Fider has seen more recent development. Open each guide below for deploy steps and the full feature gap.