The open-source scheduling infrastructure for everyone
CATEGORY MATRIX // 6 VERIFIED PROJECTS
Best Open-Source & Self-Hosted Scheduling & Booking Software
Meeting planners, appointment booking, and calendar links Compare GitHub star velocity, open-source licenses, self-hosting difficulty, and deploy with 1-click Docker Compose templates.
Commercial Scheduling & Booking SaaS You Can Replace Today
Scheduling & Booking Open-Source Comparison Matrix (2026)
| Open-Source Project | Replaces SaaS | GitHub Stars | License | Tech Stack | Difficulty | Deploy |
|---|---|---|---|---|---|---|
| Cal.com | Calendly | ★ 48,968 | AGPL-3.0 | Next.js, TypeScript, Prisma, Tailwind | Medium | Docker |
| Rallly | Doodle | ★ 5,301 | AGPL-3.0 | Next.js, TypeScript, Prisma, PostgreSQL, Tailwind | Easy | Docker |
| Easy!Appointments | Calendly | ★ 4,431 | GPL-3.0 | PHP, CodeIgniter, MySQL, Bootstrap | Easy | Docker |
| Hi.Events | Eventbrite | ★ 4,061 | AGPL-3.0 | React, TypeScript, Laravel, PostgreSQL | Medium | Docker |
| pretix | Eventbrite | ★ 2,542 | AGPL-3.0 | Python, Django, PostgreSQL, Redis | Medium | Docker |
| Indico (CERN) | Calendly | ★ 2,116 | MIT | Python, Flask, React, PostgreSQL, Celery | Medium | Docker |
All Verified Scheduling & Booking Projects (6)
Open-source group meeting poll and scheduling assistant
Lightweight self-hosted appointment booking and customer scheduler
Self-hosted event management, ticketing, and check-in platform
Enterprise-grade open-source conference and event ticketing shop
Full-featured conference lifecycle, room booking, and meeting scheduler
1-Click Docker Compose Generator for Scheduling & Booking
Select any scheduling & booking service below to customize ports, volumes, and environment secrets:
1-Click Docker Compose Generator
Generate production-ready container definitions with customizable ports and volumes.
Cal.comAGPL-3.0
The open-source scheduling infrastructure for everyone
Difficulty: Medium48,968 ⭐
Configure Parameters
docker-compose.cal-com.yml
version: "3.8"
services:
calcom:
image: calcom/cal.com:latest
ports:
- "${PORT:-3000}:3000"
environment:
DATABASE_URL: postgresql://calcom:${DB_PASSWORD:-calcom_pwd}@postgres:5432/calcom
NEXT_PUBLIC_WEBAPP_URL: "${APP_URL:-http://localhost:3000}"
CALENDSO_ENCRYPTION_KEY: "${ENCRYPTION_KEY:-secret_32_char_encryption_key_2026}"
depends_on:
- postgres
restart: unless-stopped
postgres:
image: postgres:15-alpine
environment:
POSTGRES_USER: calcom
POSTGRES_PASSWORD: ${DB_PASSWORD:-calcom_pwd}
POSTGRES_DB: calcom
volumes:
- calcom_pg_data:/var/lib/postgresql/data
volumes:
calcom_pg_data:Frequently Asked Questions: Self-Hosted Scheduling & Booking
What is the best open-source Scheduling & Booking software to self-host in 2026?
Based on community adoption and GitHub velocity, Cal.com (48,968 GitHub stars) is the leading open-source scheduling & booking solution. It replaces Calendly and is distributed under the AGPL-3.0 license.
Can I deploy self-hosted Scheduling & Booking tools using Docker Compose?
Yes. All 6 open-source scheduling & booking projects listed on this page include production-tested Docker Compose configurations with persistent volume mounts and environment variable customization.
Which commercial SaaS products in Scheduling & Booking can be replaced with open source?
You can replace proprietary tools including Calendly, Doodle, Eventbrite with self-hosted open-source equivalents, eliminating per-seat subscription costs while retaining 100% data sovereignty.
What server specs are needed to self-host Scheduling & Booking software?
Most scheduling & booking applications run smoothly on a standard Linux VPS with 2 vCPU and 2GB–4GB RAM ($6–$12/month on Hetzner, DigitalOcean, or Linode).