Callers booked into your Cal.com event types
Connect Cal.com and your Allo AI receptionist books the meeting while the caller is still on the line, into an event type you already use, inside the hours you set.
Cal.comNative integrationBooks during the callLive in minutesTrusted by 6,000+ businesses
From a ringing phone to a booked meeting
No message to return, no callback to promise. Your AI receptionist answers, chooses the right event type and books the caller in before they hang up.
The caller asks, the agent answersYour AI receptionist picks up, works out what the caller wants and offers a time that is actually open, 24 hours a day.
Booked into an event type you already useThe agent books into one of your existing Cal.com event types and never creates a new one. Offer up to 20 on the same call, each with a note saying when to use it.
Cal.com
Booked
It books inside your rulesBusiness hours, a buffer between meetings, a minimum notice period and your blocked dates are all respected, so the agent never books a slot you can't keep.
Booking rulesWhat Allo reads and writes in Cal.com
Allo reads what it needs to pick the right meeting, and writes exactly one thing back: the booking.
Cal.comCalendarsRead from your Cal.com profileOne-way
Event typesUp to 20 offered per agentOne-way
Business hours and time zoneSet per connected calendarOne-way
Blocked datesNever booked overOne-wayBookingsCreated during the callOne-wayEach connected Cal.com calendar carries its own hours, time zone, blocked dates and booking rules.
Sending a booking link vs booking on the call
Sending a booking link
Callers asked to leave a message and wait for a callback- A link sent after the call that half of them never open
- A time agreed on the phone, then double-booked
- Evenings and weekends going straight to voicemail
With Allo
The meeting booked while the caller is still on the line- The right event type picked for what they asked for
- Only slots that are genuinely free, inside your hours
- Bookings taken after hours and at the weekend
Allo is an AI phone system, not just an integration
The Cal.com sync is one part. Allo is the phone your team calls, texts and gets coached from every day.
AI receptionistAllo answers when you can't, qualifies the caller and books the meeting, 24/7, so no lead slips away.
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Call recording and AI summariesEvery call is recorded, transcribed and summarized, so the key points and next steps are captured without taking notes.
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Run Allo from your AI assistantConnect Allo to Claude, ChatGPT and more through the Allo MCP, and pull call data or trigger actions just by asking.
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Business texting built inText customers from your Allo number and keep calls and messages together in one place.
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Call queue
Power dialerCall through a list back to back with no manual dialing, so your reps spend their time talking, not clicking.
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+12%
Call analyticsSee call volume, outcomes and team activity at a glance, and coach from real conversations.
Explore this featureCal.com integration FAQ
With an API key. In Cal.com, go to Settings, then Developer, then API keys, add one named Allo and create it with no expiration date. In Allo, go to Settings, then Integrations, then Cal.com, click Connect Cal.com and paste the key. Allo checks it against your account before saving it.
One of your existing event types, like a 30 minute call or a product demo. It never creates a new one. You can offer up to 20 event types on the same call, and give each a short note, for example when the caller wants a demo, so the agent knows which to use.
Allo falls back to the first event type on your Cal.com account, which may well be a test one. Always choose the event type in the agent's calendar settings, it takes a second and it's the difference between the right meeting and the wrong one.
Yes. Any team member can connect their own Cal.com account, and it's then visible to the whole workspace. Admins and managers can assign any connected calendar to an agent and configure its event types. A regular team member can assign their own, or a teammate's once that teammate has set its event types up.
Booking rules. A 30 minute buffer between meetings and a 2 hour minimum notice are on by default, business hours are respected by default, and you can turn on a booking window to cap how far ahead callers can book, 60 days by default. Blocked dates are never booked over.
Yes. The Cal.com connection exists so your Allo AI receptionist can book a caller in during the call. It's what turns an after-hours call into an appointment instead of a voicemail.