Calcom vs Easy!Appointments vs Rallly: Best Self-Hosted Scheduling & Booking Tools (2026)

Self-hosted scheduling tools give you full control over your appointment booking, event coordination, and meeting availability without relying on cloud services like Calendly or Doodle. Whether you need a professional booking system for client appointments, a collaborative scheduling tool for team meetings, or a simple poll-based organizer, open-source solutions cover every use case.

This guide compares three leading self-hosted scheduling platforms — Calcom, Easy!Appointments, and Rallly — with hands-on Docker Compose configurations, feature comparisons, and deployment instructions.

Quick Comparison

Calcom — Enterprise-Grade Scheduling Infrastructure

Calcom is the most popular open-source scheduling platform, offering a comprehensive booking system that rivals commercial tools like Calendly. With over 42,000 GitHub stars and active development, it supports teams, enterprises, and individual users.

Key Features

• Event Types: Create unlimited booking types with custom durations, buffers, and availability windows
• Calendar Integration: Two-way sync with Google Calendar, Outlook, and Apple Calendar
• Team Scheduling: Round-robin assignment, collective scheduling, and managed teams
• Payment Collection: Built-in Stripe integration for paid bookings
• Workflows: Automated email/SMS reminders, follow-ups, and confirmations
• API-First: Full RESTful API (v2) with webhook support for integrations
• Organizations: Multi-tenant support with custom domains and branding

Docker Compose Deployment

Calcom requires PostgreSQL and Redis. Here is the minimal production-ready setup:

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volumes:
  database-data:
  redis-data:

networks:
  stack:

services:
  database:
    image: postgres:15-alpine
    restart: always
    volumes:
      - database-data:/var/lib/postgresql/data
    environment:
      POSTGRES_USER: calcom
      POSTGRES_PASSWORD: secure_password_here
      POSTGRES_DB: calcom
    networks:
      - stack

  redis:
    image: redis:7-alpine
    restart: always
    volumes:
      - redis-data:/data
    networks:
      - stack

  calcom:
    image: calcom/cal.diy:latest
    restart: always
    ports:
      - "3000:3000"
    networks:
      - stack
    environment:
      DATABASE_URL: postgresql://calcom:secure_password_here@database:5432/calcom
      DATABASE_DIRECT_URL: postgresql://calcom:secure_password_here@database:5432/calcom
      NEXTAUTH_SECRET: generate_a_random_secret_here
      CALENDSO_ENCRYPTION_KEY: generate_another_random_key
      NEXT_PUBLIC_WEBAPP_URL: http://localhost:3000
    depends_on:
      - database
      - redis

Start the stack with docker compose up -d and access Calcom at http://localhost:3000. The first setup wizard guides you through admin account creation and calendar provider configuration.

Best For

Calcom excels when you need a full-featured booking platform with calendar sync, payment processing, and team management. It is ideal for consultants, agencies, and businesses that take appointments.

Easy!Appointments — Lightweight Appointment Management

Easy!Appointments is a mature, PHP-based appointment scheduling system designed for small businesses, clinics, and service providers. It has been actively developed since 2013 and maintains a straightforward, no-frills approach.

Key Features

• Service Management: Define services with custom durations, prices, and assigned providers
• Provider Schedules: Individual calendars for each service provider with custom working hours
• Customer Self-Service: Public booking page where customers select service, provider, date, and time
• Admin Dashboard: Manage appointments, customers, providers, and services from a single interface
• Google Calendar Sync: One-way sync to Google Calendar for providers
• Notifications: Email notifications for new appointments and reminders
• Custom Fields: Add extra fields to the booking form for customer information
• Multi-language: Supports 30+ languages out of the box

Docker Compose Deployment

Easy!Appointments runs on Apache/PHP with MySQL. A community-maintained Docker image is available:

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volumes:
  mysql-data:

services:
  mysql:
    image: mysql:8.0
    restart: always
    volumes:
      - mysql-data:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: root_password_here
      MYSQL_DATABASE: easyappointments
      MYSQL_USER: ea_user
      MYSQL_PASSWORD: ea_password_here
    ports:
      - "3306:3306"

  easyappointments:
    image: tonderaishe/easyappointments:latest
    restart: always
    ports:
      - "8080:80"
    environment:
      DB_HOST: mysql
      DB_NAME: easyappointments
      DB_USER: ea_user
      DB_PASSWORD: ea_password_here
    depends_on:
      - mysql

After starting, visit http://localhost:8080 and follow the installation wizard. The PHP-based architecture makes it lightweight and easy to deploy on low-resource servers.

Best For

Easy!Appointments is ideal for small businesses, medical practices, salons, and service providers who need a straightforward appointment booking system without enterprise complexity. Its PHP stack means lower resource requirements compared to Node.js alternatives.

Rallly — Collaborative Scheduling Polls

Rallly takes a different approach — instead of traditional booking, it creates scheduling polls where participants vote on their preferred times. It is the open-source alternative to Doodle, designed for group event planning and team meeting coordination.

Key Features

• Scheduling Polls: Create polls with multiple date/time options for participants to vote on
• Participant Management: Invite via email or shareable link; no account required for voters
• Time Zone Support: Automatic time zone detection and conversion for all participants
• Comment System: Participants can add comments to explain their availability
• Final Decision: Poll creator selects the best time and notifies all participants
• Guest Access: Voters participate without creating accounts
• Clean UI: Modern React-based interface with responsive design

Docker Compose Deployment

Rallly requires PostgreSQL and runs as a single application container:

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services:
  postgres:
    image: postgres:15-alpine
    restart: always
    environment:
      POSTGRES_USER: rallly
      POSTGRES_PASSWORD: rallly_secret
      POSTGRES_DB: rallly
    volumes:
      - postgres-data:/var/lib/postgresql/data

  rallly:
    image: lukevella/rallly:latest
    restart: always
    ports:
      - "3000:3000"
    environment:
      DATABASE_URL: postgresql://rallly:rallly_secret@postgres:5432/rallly
      SECRET_PASSWORD: generate_random_secret
      NEXTAUTH_URL: http://localhost:3000
      SUPPORT_EMAIL: admin@example.com
    depends_on:
      - postgres

volumes:
  postgres-data:

Visit http://localhost:3000 to create your first scheduling poll. The setup takes under a minute.

Best For

Rallly shines for team meetings, group events, and any situation where you need to find a common time among multiple people. It replaces Doodle with a self-hosted, privacy-respecting alternative.

Why Self-Host Your Scheduling Tools?

Moving your scheduling infrastructure to a self-hosted platform offers several compelling advantages over cloud-based alternatives like Calendly, Doodle, or Acuity Scheduling.

Data Ownership and Privacy: When you self-host, all appointment data, customer information, and scheduling patterns remain on your own servers. Cloud scheduling services build detailed profiles of your booking habits, client relationships, and business rhythms. Self-hosting eliminates this third-party data collection entirely. For businesses handling sensitive client information — therapists, legal professionals, healthcare providers — this is not optional.

No Usage Limits or Per-User Pricing: Commercial scheduling platforms charge per user or per booking volume. Calcom, Easy!Appointments, and Rallly are all completely free with unlimited users, events, and bookings. As your team grows from 5 to 50 members, your scheduling costs stay at zero.

Full Customization and Integration: Self-hosted tools can be modified to match your exact workflow. Calcom’s API lets you embed booking into your own applications. Easy!Appointments can be customized for industry-specific needs. Rallly can be adapted for internal team use with custom authentication.

Reliability and Uptime Control: You control the infrastructure. No surprise downtime during peak booking periods, no service changes forced by the vendor, and no risk of the platform being discontinued. Your scheduling system stays available as long as your server runs.

Compliance Requirements: GDPR, HIPAA, and other regulations may require you to maintain full control over personal data. Self-hosted scheduling tools keep all personally identifiable information (PII) — names, emails, phone numbers — within your own infrastructure.

For setting up HTTPS with your self-hosted scheduling tool, check our TLS certificate automation guide. If you need complementary team collaboration tools, our Matrix homeserver comparison covers secure messaging options. For a broader approach to team communication, see our self-hosted messaging comparison.

Which Tool Should You Choose?

The right choice depends on your specific scheduling needs:

• Choose Calcom if you need a full-featured booking platform with calendar sync, payment processing, team management, and API access. It is the most comprehensive option and the closest self-hosted alternative to Calendly.

• Choose Easy!Appointments if you want a lightweight, low-resource appointment system for a small business or practice. Its PHP/MySQL stack runs comfortably on 512MB RAM and the interface is straightforward for non-technical users.

• Choose Rallly if your primary need is finding common meeting times among groups. It excels at collaborative scheduling where no single person dictates the time — perfect for team meetings, social events, and committee scheduling.

All three tools are open source, free to use, and can be deployed with Docker Compose in minutes. You can even run multiple tools side by side — Calcom for client bookings, Rallly for internal team scheduling.

FAQ

Is Calcom really free to self-host?

Yes. Calcom is released under the MIT license. The self-hosted version includes all core scheduling features — event types, team scheduling, calendar sync, and API access. Enterprise features like advanced analytics and SSO are available through Calcom’s hosted platform but are not required for self-hosted use.

Can Easy!Appointments handle recurring appointments?

Easy!Appointments supports recurring appointments natively. You can configure services to repeat on a weekly, bi-weekly, or monthly schedule. The system automatically generates appointment slots based on provider availability and service duration settings.

Does Rallly require participants to create accounts?

No. Rallly is designed for frictionless participation. Poll creators create an account, but participants vote on scheduling polls via a shareable link without registering. This makes it ideal for coordinating with external contacts, clients, or community groups.

Which scheduling tool has the lowest resource requirements?

Easy!Appointments has the smallest footprint. Its PHP/MySQL stack runs comfortably on 512MB RAM. Calcom (Node.js/PostgreSQL/Redis) and Rallly (Node.js/PostgreSQL) both require at least 1GB RAM for smooth operation due to their modern JavaScript frameworks.

Can I migrate from Calendly or Doodle to these self-hosted tools?

Calcom provides import tools for Calendly event types. Easy!Appointments has CSV import for services and providers. Rallly does not have a direct Doodle import, but creating equivalent polls takes seconds. None of these tools export your data back to cloud services.

How do I set up email notifications for bookings?

All three tools support SMTP configuration. Add your SMTP server details (host, port, credentials) to each tool’s environment variables or admin panel. For production use, consider running a local MTA like Postal or using a transactional email service for reliable delivery.