Self-Host Cal.com: Calendly Alternative Scheduling 2026

TL;DR

Cal.com (AGPL 3.0, ~32K GitHub stars, TypeScript/Next.js) is the open source Calendly — a scheduling platform where people book meetings on your calendar without email back-and-forth. Calendly charges $10–16/month for professional features. Self-hosted Cal.com gives you unlimited event types, team scheduling, round-robin assignment, and payment collection for free.

Key Takeaways

• Cal.com: AGPL 3.0, ~32K stars, TypeScript/Next.js — full scheduling platform
• Multiple event types: 1:1, group, round-robin, collective (all team members present)
• Calendar sync: Google Calendar, Outlook, CalDAV — no double-bookings
• Customizable: Embed booking widget on your website
• Payments: Stripe integration for paid bookings
• Requirements: Node.js + PostgreSQL; ~500MB RAM

---

Cal.com vs Calendly

Feature	Cal.com (self-hosted)	Calendly Essentials	Calendly Teams
Cost	Free (hosting)	$10/user/mo	$16/user/mo
Event types	Unlimited	1 type (free)	Unlimited
Team scheduling	Yes	No (free)	Yes
Round-robin	Yes	No	Yes
Payments (Stripe)	Yes	No	Yes
Custom domain	Yes	Yes (paid)	Yes
Zapier/webhooks	Yes	Yes (paid)	Yes
Self-hosted	Yes	No	No

---

Part 1: Docker Setup

Cal.com requires several environment variables. The official repo has a .env.example:

git clone https://github.com/calcom/cal.com calcom
cd calcom
cp .env.example .env

Edit .env:

DATABASE_URL=postgresql://calcom:password@db:5432/calcom
NEXTAUTH_SECRET=$(openssl rand -hex 32)
CALENDSO_ENCRYPTION_KEY=$(openssl rand -hex 32)
NEXTAUTH_URL=https://cal.yourdomain.com
NEXT_PUBLIC_WEBAPP_URL=https://cal.yourdomain.com

# Email (required):
EMAIL_FROM=noreply@yourdomain.com
EMAIL_SERVER_HOST=smtp.yourdomain.com
EMAIL_SERVER_PORT=587
EMAIL_SERVER_USER=noreply@yourdomain.com
EMAIL_SERVER_PASSWORD=your-smtp-password

# docker-compose.yml
services:
  db:
    image: postgres:16-alpine
    restart: unless-stopped
    volumes:
      - db_data:/var/lib/postgresql/data
    environment:
      POSTGRES_DB: calcom
      POSTGRES_USER: calcom
      POSTGRES_PASSWORD: "${POSTGRES_PASSWORD}"
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U calcom"]
      interval: 10s

  calcom:
    image: calcom/cal.com:latest
    container_name: calcom
    restart: unless-stopped
    ports:
      - "3000:3000"
    depends_on:
      db:
        condition: service_healthy
    env_file:
      - .env
    environment:
      DATABASE_URL: "postgresql://calcom:${POSTGRES_PASSWORD}@db:5432/calcom"

volumes:
  db_data:

docker compose up -d

---

Part 2: HTTPS with Caddy

cal.yourdomain.com {
    reverse_proxy localhost:3000
}

Visit https://cal.yourdomain.com → create admin account.

---

Part 3: Create Your First Event Type

1. Event Types → New Event Type
2. Title: "30-minute Meeting"
3. URL: cal.yourdomain.com/yourname/30min
4. Duration: 30 minutes
5. Location: Zoom / Google Meet / Custom (add as an app first)
6. Availability: Select your schedule (or create a custom one)
7. Save

Share the link: https://cal.yourdomain.com/yourname/30min

---

Part 4: Calendar Integration (No Double-Bookings)

Connect your calendar so Cal.com checks availability:

1. Settings → Connected Calendars → Connect Calendar
2. Google Calendar: OAuth2 flow (add Google credentials in Settings → Apps → Google)
3. Outlook: Microsoft OAuth2
4. CalDAV: Enter CalDAV URL + credentials

Cal.com reads busy/free blocks from connected calendars, so scheduled meetings never overlap with existing events.

Create events on booking: Select which calendar new bookings are added to.

---

Part 5: Team Scheduling

Add team members to collective or round-robin events:

Round-Robin (One team member, rotated)

1. Event Types → New Event Type → Type: Round-Robin
2. Add team members
3. Algorithm: Round Robin (equal distribution) or Maximize Availability (first available)
4. Booking URL: cal.yourdomain.com/team/yourteam/support

Customers book → Cal.com assigns to the next available team member.

Collective (All must attend)

1. Event Type → Type: Collective
2. Add attendees (all must be available for the booking to show)
3. Used for: interviews, demos with multiple presenters

---

Part 6: Availability Schedules

1. Settings → Availability → New Schedule
2. Name: "Business Hours"
3. Days: Monday–Friday
4. Hours: 9:00 AM – 5:00 PM
5. Timezone: Your timezone

Set buffer times:

• Before event: 15 minutes (prep time)
• After event: 15 minutes (recovery time)

---

Part 7: Booking Page Customization

Event Type → Advanced:

• Custom confirmation redirect URL
• Custom email templates
• Questions to ask bookers (custom form fields)
• Require payment (Stripe) before confirming

Embed on your website:

<!-- Inline embed: -->
<div style="width:100%;height:100%;overflow:scroll">
  <iframe src="https://cal.yourdomain.com/yourname/30min?embed=true"
    frameborder="0" allowfullscreen></iframe>
</div>

<!-- Or use the Cal.com embed snippet: -->
<script src="https://cal.yourdomain.com/embed/embed.js"></script>
<script>Cal("init"); Cal("inline", {calLink: "yourname/30min"})</script>

---

Part 8: Stripe Payments

Accept payment when someone books:

1. Settings → Apps → Stripe → Install
2. Connect Stripe account (OAuth)
3. In Event Type → Payments → Enable, set price
4. Bookers must pay before the booking is confirmed

---

Part 9: Webhooks

Trigger webhooks on booking events for automation:

1. Settings → Developer → Webhooks → New Webhook
2. Endpoint URL: https://n8n.yourdomain.com/webhook/calcom
3. Events: Booking Created, Booking Cancelled, Booking Rescheduled

Use with n8n or Zapier to:

• Add bookings to a CRM
• Send custom confirmation SMS
• Create a Notion/Airtable record
• Notify a Slack channel

---

Maintenance

# Update Cal.com:
docker compose pull
docker compose up -d

# Backup:
docker exec calcom-db-1 pg_dump -U calcom calcom | gzip \
  > calcom-backup-$(date +%Y%m%d).sql.gz

# Logs:
docker compose logs -f calcom

# Run migrations after update:
docker exec calcom npx prisma migrate deploy

---

See all open source productivity and scheduling tools at OSSAlt.com/alternatives/calendly.