Appointment Booking
Your next customer is calling. Is anyone there?
The AI appointment booking agent that answers when your team can't
Stellar is an AI appointment scheduler — a voice agent that answers every inbound call, books appointments straight onto your calendar, and handles the reschedules, cancellations, and lookups when callers ring back. Connects to Google Calendar, Cal.com, or Calendly. Works around the clock.
Live transcript
What does a Stellar booking call actually sound like?
Stellar handles the full conversation naturally. It greets the caller, asks what they want booked, checks real availability, confirms the slot, and wraps up the call. No rigid script, no awkward pauses, no transfer to a human just to read off three time slots.
Stellar Agent
Live call transcript
AI voice call in progress
Capabilities
Stellar handles the full booking lifecycle, not just the easy part
Books new appointments
Stellar checks your calendar in real time, finds open slots that match the service the caller asked for, confirms the time on the call, and sends a calendar invite before hanging up.
Reschedules existing appointments
When a caller rings back to move a booking, Stellar finds it on the calendar, verifies the booking actually belongs to them, pulls real availability for the new time, and updates the invite without anyone on your team having to step in.
Cancels appointments
When a customer cannot make it, Stellar cancels the booking on the right calendar, frees the slot for someone else, and sends a cancellation email so the record stays clean.
Handles support questions
Stellar answers questions about pricing, hours, services, and policies straight from your knowledge base, and emails follow-ups during the call whenever a caller asks for the details in writing.
Recognizes returning customers
Stellar pulls prior call history at the top of every call so a regular customer does not get re-asked the same five qualifying questions on every visit.
Knows when to escalate
An angry caller, a real emergency, or a question the knowledge base does not cover gets warm-transferred to a human with a one-sentence summary, so your team picks up the call already in context.
Reschedule & cancel
How does Stellar handle a reschedule?
Most voice agents stop at the initial booking. Stellar keeps going. When a caller rings back to reschedule or cancel, the agent handles the full flow:
- 1.Looks up the booking by the caller's phone number, with no booking ID required.
- 2.Verifies the booking belongs to them by confirming the name or email on file.
- 3.Pulls real availability for the new time and reads back the options.
- 4.Updates the calendar, sends the new confirmation, and frees the old slot for someone else.
No "I'll have someone get back to you." The change is done before the call ends.
Calendar of your choice
Which calendars does Stellar work with?
Stellar connects to Google Calendar, Cal.com, and Calendly. You can pick one or use all three. If your team uses different calendars per person, you can give each agent its own, so bookings always end up where you actually want them. Stellar reads availability live, avoids double-booking, and sends invites automatically.
Configure your services once
Add your services with durations. Stellar handles the rest, matching callers to the right service and finding available slots.
Pick up the 2 AM call without a night shift.
After-hours mode turns on automatically based on your business hours. Stellar reads a custom greeting, takes messages where appropriate, and books the next available slot for when your team is back.
Accept bookings around the clock
14 days free, no credit card. Connect your calendar and have an AI booking agent live in about ten minutes.