Acuity Scheduling
Online appointment booking software with automated scheduling and reminders
Open-Source Projects
Discover top open-source software, updated regularly with real-world adoption signals.
Discover top open-source software, updated regularly with real-world adoption signals.
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.
When teams consider Cal.com, these hosted platforms usually appear on the same shortlist.
Looking for a hosted option? These are the services engineering teams benchmark against before choosing open source.
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
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.
Cal.com is licensed under AGPLv3 for public repositories. If you need to keep modifications private, a commercial license is available.
Self-hosting requires Node.js 18+, PostgreSQL 13+, and Yarn. Docker and Docker Compose simplify local development with the yarn dx quick-start.
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.
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
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