Cal.com

Cal.com is an online scheduling infrastructure platform that lets individuals and organizations create booking pages, synchronize calendars, automate reminders, route meetings and accept payments. Its core product is scheduling rather than AI, but the platform now includes AI functionality through Cal.ai, which provides customizable AI-powered phone calls for booking confirmations, reminders, follow-ups and rescheduling. Cal.com also introduced AI chat capabilities in routing forms. The platform supports more than 100 integrations and can connect calendars, conferencing tools, CRMs, payment systems and automation platforms. Cal.com historically built its identity around open source, but in April 2026 the company moved its commercial Cal.com codebase to closed source while launching Cal.diy as the open-source community edition under MIT. The hosted Cal.com service is currently active. No general country-level restriction was identified; specific payment, phone and third-party integrations may vary by country.