Acuity Scheduling
Online appointment booking software with automated scheduling and reminders
Cal.com
Open-source scheduling infrastructure you control and customize
Self-hosted Calendly alternative offering full control over your scheduling data, workflow, and branding. API-driven, white-label by design, and deployable on your own domain.
Overview
Highlights
Self-hosted or cloud: deploy on your domain or use managed hosting
White-label by design: full control over branding and appearance
API-driven architecture: integrate scheduling into any workflow
Data sovereignty: own your events, availability, and user information
Pros
- Complete control over scheduling data and user experience
- API-first design enables deep integration with existing systems
- Active development with strong community and Hacker News recognition
- Flexible deployment: self-host or use managed service
Considerations
- Self-hosting requires Node.js, PostgreSQL, and DevOps expertise
- AGPLv3 license mandates open-sourcing modifications in public deployments
- Integration setup may require obtaining third-party API credentials
- Steeper learning curve compared to SaaS-only scheduling tools
Managed products teams compare with
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Fit guide
Great for
- Development teams needing embeddable scheduling in their products
- Agencies requiring white-label booking for multiple clients
- Privacy-conscious organizations wanting on-premise data control
- Businesses seeking API-driven scheduling automation
Not ideal when
- Non-technical users without access to hosting infrastructure
- Teams seeking zero-configuration SaaS with no maintenance
- Projects requiring proprietary closed-source modifications without licensing
- Organizations lacking Node.js and PostgreSQL operational experience
How teams use it
SaaS product embedded booking
Integrate native scheduling into your application without redirecting users to third-party tools
Agency white-label scheduling
Deploy branded booking pages for multiple clients under their own domains
Enterprise on-premise deployment
Maintain full data sovereignty while automating internal and external meeting coordination
Service business automation
Customize booking workflows for yoga studios, consultancies, or educational seminars with API integrations
Tech snapshot
TypeScript96%
CSS3%
HTML1%
JavaScript1%
PLpgSQL1%
MDX1%
Frequently asked questions
Can I use Cal.com without self-hosting?
Yes. Cal.com offers a managed hosting service alongside the self-hosted option, so you can choose based on your technical resources and control requirements.
What license governs Cal.com?
Cal.com is licensed under AGPLv3 for public repositories. If you need to keep modifications private, a commercial license is available.
What are the minimum technical requirements?
Self-hosting requires Node.js 18+, PostgreSQL 13+, and Yarn. Docker and Docker Compose simplify local development with the yarn dx quick-start.
How does Cal.com compare to Calendly?
Cal.com offers similar scheduling features but with full data ownership, API access, white-label customization, and the option to self-host on your infrastructure.
Can I integrate third-party services?
Yes. Cal.com supports various integrations, though you may need to obtain API credentials for each service you wish to connect.
Project at a glance
Active- Stars
- 39,770
- Watchers
- 39,770
- Forks
- 11,620
Repo age4 years old
Last commit2 days ago
Self-hostingSupported
Primary languageTypeScript
Last synced yesterday