Open-source group meeting poll and scheduling assistant
Cal.com is the open-source Calendly killer. Highly customizable, supports multi-calendar sync, round-robin team scheduling, Stripe/PayPal payment integrations, and complete self-hosting.
Recommended VPS & Hardware Sizing
Estimated Hosting: $10 - $15/mo (e.g. Hetzner CPX21 or Linode)Cal.com vs Calendly Comparison Matrix
| Evaluation Criteria | Cal.com (Open Source) | Calendly (Proprietary) |
|---|---|---|
| White-label & Domain | Full custom domain free | Requires $16/mo plan |
| Multiple Accounts | Unlimited team members | Pay per seat |
| Data Privacy | GDPR & HIPAA compliant on your cloud | Calendly cloud data store |
Financial Impact: Migrating from Calendly to Self-Hosted Cal.com
* Excludes enterprise SSO add-ons & usage overages
* Commodity Hetzner / DigitalOcean compute instance
Compare Cal.com Head-to-Head
Comprehensive benchmark comparing Cal.com against proprietary Calendly licensing and features.
Ad-Free Open-Source Group Meeting Polls vs Doodle Cluttered Ad Traps
Self-Hosted Ticketing & Check-In vs Eventbrite 3.7% + $1.79 Ticket Cut
Core Capabilities & Features
Self-Host Cal.com with Docker Compose
Tweak configuration ports, secrets, and volumes live. Download or copy your ready-to-run container file:
1-Click Docker Compose Generator
Generate production-ready container definitions with customizable ports and volumes.
The open-source scheduling infrastructure for everyone
version: "3.8"
services:
calcom:
image: calcom/cal.com:latest
ports:
- "${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-Hosting Cal.com
How do I self-host Cal.com using Docker Compose?
You can deploy Cal.com (calcom/cal.com) on any Linux server by copying the docker-compose.yml template on this page, configuring your desired host port and persistent volume directory, and running 'docker compose up -d'.
How does Cal.com compare to Calendly?
Cal.com is an open-source, self-hosted alternative to Calendly built with Next.js, TypeScript, Prisma, Tailwind. Unlike Calendly ($12 - $16 / user / month), Cal.com has zero per-user licensing fees and keeps 100% of your data on your own infrastructure.
What are the minimum VPS RAM and CPU requirements for Cal.com?
For production self-hosting (Medium difficulty tier), we recommend at least 4 GB RAM (minimum 2 GB), 2 vCPU, and 25 GB SSD storage, which typically costs $10 - $15/mo (e.g. Hetzner CPX21 or Linode).
Is Cal.com free for commercial business use under the AGPL-3.0 license?
Yes. Distributed under the AGPL-3.0 license, Cal.com can be self-hosted internally by businesses and engineering teams of any size without per-seat royalties.
Embed Official Cal.com Badge in GitHub README
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