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Cal.com

✓ Verified FOSSAGPL-3.0
Top open-source alternative to Calendly

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.

Tech StackNext.js, TypeScript, Prisma, Tailwind
Self-Host DifficultyMedium
License ModelAGPL-3.0
GitHub Repositorycalcom/cal.com

Recommended VPS & Hardware Sizing

Estimated Hosting: $10 - $15/mo (e.g. Hetzner CPX21 or Linode)
Min RAM:2 GB
Rec RAM:4 GB
Compute:2 vCPU
Disk Space:25 GB SSD

Cal.com vs Calendly Comparison Matrix

Evaluation CriteriaCal.com (Open Source)Calendly (Proprietary)
White-label & DomainFull custom domain freeRequires $16/mo plan
Multiple AccountsUnlimited team membersPay per seat
Data PrivacyGDPR & HIPAA compliant on your cloudCalendly cloud data store
INTERACTIVE TCO MODELEstimated Rate: $14/user/mo

Financial Impact: Migrating from Calendly to Self-Hosted Cal.com

Detailed Stack Calculator →
5 Users (Early Startup)50 Users (Scaleup)200 Users (Enterprise Org)
Calendly (Cloud SaaS)Per-Seat Tax
$4,200per year ($350/mo)
3-Year Spend:$12,600

* Excludes enterprise SSO add-ons & usage overages

Cal.com (Self-Hosted)Zero Per-Seat Fee
$120per year ($10/mo Linux VPS)
3-Year Compute:$360

* Commodity Hetzner / DigitalOcean compute instance

Cumulative 3-Year ROI+$12,240Net savings across 36 months (97% reduction)
Annual Free Cash:+$4,080/yr
Need C-Level Buy-In? Generate an instant ROI proposal memo to present to your CTO or CFO.

Core Capabilities & Features

✓White-Label Custom Branding
✓Multi-calendar Synchronization
✓Automated Workflows & SMS
✓Stripe Payment Gates

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.

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-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.

README INTEGRATION // REPO EMBED

Embed Official Cal.com Badge in GitHub README

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