Cal.com

Open-source scheduling infrastructure that gives individuals, teams, and developers full control over meeting booking. Lets users share availability, sync calendars, and let others book without back-and-forth, while keeping events and data under their own control.

Trusted by companies like Vercel, Supabase, and Mintlify. Cal.com stands out by being self-hostable or cloud-hosted, white-label by design, and API-driven. Unlike closed alternatives, it can be deployed on your own domain with full access to the codebase.

Core capabilities:

• Self-hosted or cloud deployment with Docker support
• Public API v2 and OAuth for custom integrations
• Cal.com Atoms: React components to embed scheduling in any app
• Calendar sync, buffers, meeting limits, and custom short booking links
• Built-in video conferencing, Stripe payments, workflows, and webhooks
• 65+ languages and extensive app integrations

Recruiting and sales teams use it for candidate and prospect calls. Support and education use it for office hours and tutoring. Healthcare and telehealth rely on it for patient scheduling where data residency matters. Developers embed it via Atoms or the API to add scheduling to SaaS products without building from scratch.