Self-hostable open-source Calendly alternatives
Automated meeting scheduling. Self-host keeps booking data private and removes per-seat costs.
Among 2 self-hostable open-source Calendly alternatives tracked here, Cal.com currently leads on the Self-Host Health Score (100/100, 45k★, last commit 3d ago). For a Raspberry Pi or a low-RAM VPS, Easy!Appointments is the lightest at a documented ~512 MB (MySQL). 2 of them publish official ARM64 images (Raspberry Pi / Apple Silicon). 1 offer a one-click deploy (e.g. Railway, Render, Vercel).
| Tool | Health | Stars | Database | Min RAM | ARM/Pi | One-click | Updated |
|---|---|---|---|---|---|---|---|
| Cal.com
↗
Scheduling infrastructure for everyone; deep integrations + API. |
100 Thriving |
45k★ TypeScript |
PostgreSQL | 2048 MB | ✓ ● | Railway ↗ Render ↗ Vercel | 3d ago MIT |
| Easy!Appointments
↗
Lightweight PHP appointment scheduler; runs on cheap LAMP. |
91 Thriving |
4.2k★ PHP |
MySQL | 512 MB | ✓ ● | — | 1d ago GPL-3.0 |
FAQ
What is the best self-hostable Calendly alternative?
By the live Self-Host Health Score, Cal.com ranks highest (100/100).
Which open-source Calendly alternatives run on a Raspberry Pi?
Those publishing official ARM64 images: Cal.com, Easy!Appointments.
Which is the lightest on RAM?
Easy!Appointments, at about 512 MB.