Cal.com

Teams and individuals who want a fully customizable, self-hosted Calendly alternative with white-labeling, API access, and no per-booking fees

Scheduling ★★★★☆ 4.3/5 Free self-hosted (Cloud from $12/mo) Visit Website

Open source under AGPLv3 with self-hosting option gives complete control over scheduling data, custom domain support, and white-label branding at zero cost
Collective and round-robin scheduling routes meetings across team members based on availability, priority, or equal distribution — included free, not paywalled like Calendly Teams
Workflow automations send custom email/SMS reminders, follow-ups, and webhook triggers before and after meetings without needing Zapier or n8n
Supports 20+ calendar integrations including Google Calendar, Outlook, Apple Calendar, and CalDAV, plus video tools like Zoom, Google Meet, and Daily.co
Developer-friendly with a REST API, webhook events, and embeddable booking widgets that can be customized with React components

Self-hosted setup requires Node.js, PostgreSQL, and Prisma ORM knowledge — significantly more complex than signing up for Calendly's hosted service
Mobile experience is web-only with no native iOS or Android app, unlike Calendly which offers dedicated mobile apps for managing bookings on the go
Routing forms and advanced team features are newer and less polished than Calendly's mature scheduling interface that has been refined over a decade
Cloud plan's free tier limits to one event type and one connected calendar; useful scheduling requires the $12/mo Team plan or self-hosting

Key Features

Event types with customizable durations, buffers, and booking questions
Round-robin, collective, and managed event scheduling for teams
Workflow automations with email/SMS reminders and webhook triggers
Routing forms to direct bookers to the right team member or event type
Embeddable booking widgets with inline, popup, and floating button options
Stripe and PayPal integration for paid bookings and consultation fees
White-label support with custom domains, logos, and branding on self-hosted instances