RevSquared + Cal.com.

Cal.com is the open-source scheduling platform that gives businesses full control over their booking infrastructure, and our native integration connects it directly to your AI receptionist for real-time appointment scheduling during live phone calls. The integration leverages Cal.com's robust API to check availability, list event types, book appointments, and manage bookings — all while your AI phone agent handles the conversation naturally.

During a live call, your AI receptionist can query Cal.com for available time slots by event type, present options to the caller conversationally, and confirm the booking instantly. The integration supports all Cal.com event types including individual meetings, group events, and managed event types. For businesses that value data sovereignty and self-hosting, Cal.com's open-source architecture means your scheduling data stays exactly where you want it — on your own infrastructure or Cal.com's cloud.

After the call, the integration provides full booking management capabilities including cancellation and rescheduling via the Cal.com API. This makes the AI phone agent a complete scheduling solution for tech-forward businesses, startups, healthcare practices, and professional services firms that prefer open-source tools. Combined with automated phone answering, Cal.com gives you enterprise scheduling power without enterprise lock-in.