AI Phone Agent · Inbound Calls
An AI phone agent that answers, routes and follows up
Sono picks up every call to your business on the first ring, in your company's name. It books the job, answers the routine questions, transfers the rest to your team with the reason attached, and sends the confirmation by WhatsApp.
An AI phone agent is software that answers business calls in natural speech, works out what the caller wants, completes routine tasks such as booking or taking a message, and hands the call to a person when one is needed. Sono is a managed AI phone agent: we set it up on your number, with your rules.
What it does
What can an AI phone agent do on a call?
You decide the call types and the outcome for each one during setup. This is a typical split for a service business, and you can change any row the same day.
| Caller says | Type | What Sono does |
|---|---|---|
| "I'd like to book a service for Thursday." | Booking | Checks your calendar, offers open slots, confirms one on the call and sends the details by WhatsApp or SMS. |
| "Do you work on weekends?" | Question | Answers from the knowledge base you approved: hours, prices, location, how a job works. |
| "Can I speak to Mark about my quote?" | Routing | Transfers to Mark if he is free. If not, takes a message and tells the caller when to expect a callback. |
| "Nobody picked up yesterday." | Missed call | Takes the caller's name, number and reason, then puts the lead in front of your team with a summary. |
| "The heating is out and it's freezing." | Emergency | Skips the queue and calls your on-call person right away. See after hours coverage. |
| "I want to talk to a real person." | Human | Transfers within seconds. Nobody is trapped in the AI. |
Compare
How is an AI phone agent different from
voicemail or an answering service?
| Voicemail | Human answering service | Touch-tone IVR | Sono AI phone agent | |
|---|---|---|---|---|
| Answers the call | No, records a message | Yes, during contracted hours | Plays a menu | Yes, on the first ring, around the clock |
| Understands the caller | No | Yes, a script-reader | No, keypresses only | Yes, in the caller's own words |
| Books or changes appointments | No | Usually takes a message only | No | Yes, in your calendar, on the call |
| Answers routine questions | No | Only what is in the script | No | Yes, from your knowledge base |
| Handles several calls at once | Unlimited, but nobody answers | Limited by staff on shift | Yes | Yes, no busy signal |
| Follow-up | Your team calls back later | Message emailed to you | None | Phone first, then WhatsApp or SMS |
| Languages | One greeting | Depends on the agents | One recording per language | Native speech in the languages you pick |
| Cost model | Free | Per minute or per call, with monthly minimums | Per line or per port | Per minute of conversation |
Weighing it against a person at a desk? Read AI receptionist vs answering service. Replacing a press-1 menu? See AI IVR.
On the call
What does a call with an AI phone agent sound like?
Short, direct and focused on the outcome. The agent opens with your company name, asks one question, and finishes the task or hands over with context.
Sample call (phone first, WhatsApp second)
Sono: "Thanks for calling [Business]. How can I help?"
Caller: "Hi, the boiler is making a banging noise. Can someone come look at it?"
Sono: "I can book that. Is the boiler still heating, or has it stopped?"
Caller: "It still works, just very loud."
Sono: "Thanks. We have tomorrow at 10:00 or Thursday at 14:00. Which suits you?"
Caller: "Tomorrow at 10."
Sono: "Booked. I'm sending the details to your phone on WhatsApp now. Anything else I can help with?"
If the boiler had stopped in winter, the same call would have gone straight to your on-call technician. The wording, the call types and the escalation rules are yours to set.
Käyttöauto replaced a multi-level keypad menu with Sono across six dealership locations, and 92%+ of callers are now routed correctly on the first attempt. Read the case study.
Setup
How do you set up an AI phone agent?
You do not need to replace your phone system or build anything. Sono works in front of your current number through call forwarding, and our team does the configuration.
Your opening hours, services, prices, calendar and who handles what. We turn that into call types, each with an outcome.
You call the agent yourself, with your own awkward cases, and we adjust the wording and handoffs until you are happy.
Forward every call, only after hours, or only when your lines are busy. Most customers handle their first real call within an hour of connecting their number, and you can change the split at any time.
Complex, sensitive or emotional calls go to a person with the reason attached. If Sono is unsure, it asks one short clarifying question and then transfers instead of guessing. Your team sees every call, reason and outcome in the dashboard.
Should you use a managed AI phone agent or build your own?
Developer platforms give you the building blocks: a speech model, a telephony connection and a prompt window. You write the call flow, connect the calendar, test edge cases and monitor quality. That is the right path if you have engineers and want full control.
Sono is the managed route. You get an agent that our team trained on your business and connected to your calendar. We tune it on real calls. Your side is a few test calls and a decision on the handoff rules. Most service businesses without a dev team want this version.
When is an AI phone agent not the right fit?
If you take a few calls a day and every one needs a long, personal conversation, a person should answer. Think of a law firm intake or a sensitive medical call. The same goes if the owner wants to know every caller personally. An AI phone agent pays off when calls are frequent and the reasons repeat. It pays off even more when some calls arrive while nobody can pick up: during a job, at lunch, on a Saturday or at 7 pm.
A common middle path is to start with overflow and after-hours calls only. You keep answering the calls you can take, and Sono catches the rest. See after hours answering for how that works.
How much does an AI phone agent cost?
Sono is priced per minute of conversation, from €0.30 to €0.40 per minute for a fully managed deployment. A business that receives 800 calls a month averaging 2 minutes each uses 1,600 minutes, which is €480 to €640 at that rate. Your numbers will differ, so ask for a quote built on your own call log.
An AI phone agent is the umbrella. The same setup covers the AI receptionist job of greeting and booking, the voicemail assistant job of catching missed calls, and routing. If you want the formal definition first, read what a voice agent is.
FAQ
AI phone agent questions
An AI phone agent is software that holds a phone conversation in natural speech. It understands what the caller wants, completes routine tasks such as booking or taking a message, and transfers to a person when needed. Sono's version also follows up by WhatsApp or SMS.
Sono answers in your company's name in a natural voice, and it is built for transparent, disclosed AI use in line with EU AI Act obligations. What callers mostly notice is that the call gets answered and the task gets done.
Sono asks one short clarifying question. If the caller is still unclear, or asks for a person, it transfers the call or takes a message, and passes along what it has heard so far so nobody has to repeat themselves.
Yes. Sono works in front of your current number, PBX or VoIP system through call forwarding. Your extensions, queues and hunt groups stay in place.
Yes. Sono checks availability in your calendar, offers slots, books one on the call and sends the confirmation. Ask us about your specific calendar or booking system in the demo.
Sono speaks natively in the languages you choose for your market. If a call is hard to follow because of noise or a strong accent, it asks the caller to repeat or offers a person instead of guessing.
The two terms describe the same kind of product. 'AI receptionist' stresses the front-desk job of greeting and booking, while 'AI phone agent' is the wider label that also covers routing, overflow and after-hours coverage. Sono does all of it in one setup, described on the AI receptionist page.
Get started
Every call answered.
Every job booked.
Start a 14-day free trial, or book a 30-minute demo and hear Sono take a call the way your customers would.
Related industries and use cases
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