If most calls are routine bookings, reschedules and price questions, an AI receptionist linked to your booking system is cheaper, at roughly $0.50 to $2 a call, and can book directly. If calls are complex, emotional or high-value, a human answering service at about $7 to $15 a call is safer. Most booking businesses do best with AI first and human backup.
The deciding factor isn't the technology; it's the mix of calls you receive. Sort a month of calls first, as described below, and the rest gets easier: price per call, who can actually put a booking in your diary, and which of three hybrid set-ups fits. A catering company's month is worked through as an example.
Sort a month of calls before comparing anything
Pull last month's call log from your phone provider and, if you can, listen to or note a sample of 30 to 50 calls. Put each into one of these groups:
| Call type | Example | Suits |
|---|---|---|
| New booking, standard service | "Can I book a tasting for two next Thursday?" | AI, if it can see the diary |
| Change or cancellation | "We need to move to the 14th." | AI, with your rules written down |
| Simple question | Prices, hours, parking, what's included | AI |
| High-value new enquiry | A wedding, a corporate contract, a large group | Person, or AI that captures details for a fast callback |
| Judgement or sensitive | Allergies, complaints, bereavement, medical questions | Person |
| Existing client, relationship call | Regulars who expect to speak to you | Person, or AI that transfers straight away |
| Sales calls and spam | Suppliers, marketing offers | Filter; don't pay per call for these |
As a rough guide, if 60% or more of your calls land in the first three rows, AI handles the bulk well. If high-value and sensitive calls make up a large share, a human service or a fast human callback matters more than cost per call.
An illustrative two-car driving school noted 40 calls over a fortnight and sorted them: 17 lesson bookings, 9 reschedules (mostly weather and exam dates), 6 price and package questions, 4 parents asking about progress, 2 test-day nerves calls and 2 sales calls. That is 32 of 40, or 80%, in the first three rows, so AI suits the bulk. The progress and nerves calls are relationship calls from people the instructor knows, and they should transfer or go to a callback list. For this school, an AI receptionist with a "put me through to my instructor" option covers almost everything, and a human service would mostly be paying someone to book lessons.
Price per call, side by side
List prices from vendor pages on 27 September 2026, converted to an approximate cost per call assuming three-minute calls. Your own average will differ; check it in your phone log.
| Service | Plan | What's included | Approximate cost per call |
|---|---|---|---|
| Ruby (human) | $250 a month | 50 minutes | About $15 |
| Ruby (human) | $720 a month | 200 minutes | About $11 |
| Smith.ai (human) | $300 a month | 30 calls, then $11.50 each | $10 |
| Smith.ai (human) | $2,100 a month | 300 calls, then $8.50 each | $7 |
| Smith.ai AI Receptionist | From $150 a month | 75 calls; about $1.67 a call on larger tiers | $1.67 to $2 |
| My AI Front Desk | $99 a month ($79 annually) | 200 voice minutes, plus texts and web chat | About $1.50 |
| Goodcall | $79 to $249 a month | Unlimited minutes; 100 to 500 unique callers | Roughly $0.50, if callers ring more than once |
Two billing details matter. Ruby bills by the minute, so long enquiry calls cost more; Smith.ai bills by the call, so long calls cost the same as short ones. Smith.ai also says it doesn't charge for spam or unsolicited sales calls as long as your forwarded lines pass caller ID, which is worth asking any provider about.
Where a human service still earns its premium
- Warmth and judgement. A caller planning a funeral wake or anxious about a child's allergy needs a person who can listen and adapt.
- Unusual requests. "Can you do a hog roast in a field with no power?" is easy for a trained human to note and reassure, and hard for an AI to handle without inventing an answer.
- Callers who won't talk to a machine. Some regular clients will hang up. If they're your most valuable, that matters more than the per-call saving.
- Accountability. A good service will follow a detailed script and log every call, and you have a named account manager when something goes wrong.
Where an AI receptionist is simply better
- Every call answered at once, including three at the same time at 9am on a Monday.
- Consistent answers on prices and policies, with no variation between receptionists.
- Cost at volume. Routine calls at under $2 each, against $7 or more.
- Direct booking, when connected to your system, rather than a message that someone has to action later.
- Full transcripts and summaries of every call, searchable afterwards.
The failure mode to watch is confidence. An AI that doesn't know an answer may produce a plausible one. Handover rules are where this shows up first, so test each rule with several phrasings, not just the obvious one. An illustrative test of an "allergens go to a person" rule at a bakery-café:
| What the tester said | What the AI did |
|---|---|
| "Do your cakes contain nuts? I have an allergy." | Transferred. Pass |
| "Is anything on the menu gluten-free?" | Transferred. Pass |
| "My son can't have nuts. Is the brownie OK for him?" | "Our brownies don't contain nuts." Fail |
| "Are you careful about sesame in the kitchen?" | Took a message for a callback. Pass |
The third one failed because "can't have" didn't register as an allergy, and the answer was wrong anyway: the brownies are baked alongside nut products. The fixed instruction named the behaviour, not the keyword: "If a caller asks whether any food is safe for someone, for any reason, do not answer. Say a member of the team will call back today, and take their number." Retest all four after every change. Our tutorial on writing call scripts and escalation rules covers how to limit it to what you've told it.
Who can actually put the booking in the diary?
This question often settles the comparison. A service that takes a message saves you from missed calls but not from the admin of booking. Ask each provider exactly what happens to a booking request:
- Books directly into your booking system, checking live availability.
- Books into a calendar tool such as Calendly or a shared calendar, which you then copy across.
- Takes a message by email, text or in an app, and you book it.
Human services can work at level one if their receptionists are given a login to your booking system and trained on it; ask whether they do this and at what cost. AI receptionists reach level one only if they integrate with your specific system. For how AI booking works under the hood, see what an AI receptionist is and how it handles bookings.
Worked example: a catering company's month of calls
An illustrative catering company takes about 120 calls a month. Sorting them gives this picture:
| Call type | Calls | Average length | Minutes |
|---|---|---|---|
| New event enquiries (weddings, corporate, parties) | 40 | 6 minutes | 240 |
| Tasting session bookings | 30 | 3 minutes | 90 |
| Changes to guest numbers and dates | 25 | 3 minutes | 75 |
| Dietary and allergen questions | 15 | 4 minutes | 60 |
| Suppliers and sales calls | 10 | 2 minutes | 20 |
All human. Smith.ai's $810 plan covers 90 calls; the other 20 chargeable calls at $10.50 bring it to about $1,020 a month, assuming the sales calls aren't charged. On Ruby, 465 minutes of real calls would need the 500-minute plan at $1,725.
All AI. On My AI Front Desk, 465 minutes would cost roughly $99 plus about $65 of overage credits, around $165. On Goodcall, roughly 100 distinct callers fits the $79 Starter plan.
The catch. The 40 event enquiries are where the money is; one wedding may be worth more than a year of either service. And the 15 allergen calls must not be answered by an AI. So the sensible design for this business is a hybrid: AI books tastings and handles changes, captures full details for new enquiries (date, guest count, venue, budget, dietary needs) with a promised callback within two working hours, and transfers allergen questions to a person or takes a message for a callback the same day.
The enquiry capture is the piece to check hardest, because it replaces the most valuable calls. Here is an illustrative message the owner receives by text after the AI takes one, and what the first week's review changed:
NEW EVENT ENQUIRY - call back by 3.40pm
Caller: [name], [mobile]
Event: wedding reception, Saturday 12 June 2027
Guests: about 110 day, 150 evening
Venue: marquee on a farm, no kitchen on site
Budget: not given
Dietary: 2 coeliac, several vegetarian
Notes: asked about a hog roast. AI said: "We'd love to cater
your day, that date looks great."
Two fixes came out of it. "That date looks great" sounds like a confirmation, and the AI has no view of event bookings, so the instruction became "never comment on availability for events; say the events team will confirm". And "budget: not given" appeared on most enquiries, so the AI now asks "Do you have a rough budget per head in mind? It's fine if not", which callers answered about half the time. A two-hour callback on a message like this is worth more than any per-call saving in the tables above.
Three hybrid arrangements that work
- AI first, human behind it. The AI answers every call and transfers defined call types to you or a human service. Best when most calls are routine.
- Human in hours, AI after hours. Your team or a service handles the working day; the AI covers evenings and weekends and books what it can. Best when daytime calls are complex but evening calls are simple bookings. Our tutorial on setting up an AI phone agent for after-hours calls covers the setup.
- AI for one call type only. Route a dedicated number or menu option, such as "press 1 to book or change a tasting", to the AI and everything else to people. Lowest risk, easiest to measure.
Whichever you choose, measure it for a full quarter before deciding it's working; the method in measuring an AI receptionist's return in the first 90 days works for hybrids too.
Questions to ask either kind of provider
Human services and AI receptionists fail in different ways, but the questions that expose the weak ones are much the same. Ask these on the sales call and get the answers in writing:
- How quickly does a message or booking reach me? Instantly by text, in a daily email, or inside an app you have to check? For high-value enquiries, minutes matter.
- What counts as a billable call or minute? Ask specifically about spam, wrong numbers, calls under 30 seconds and transferred calls. Smith.ai's human plans, for example, include a set number of free transfer destinations, so ask what extra ones cost. Then check the first invoice line by line. Picture a first bill from a human service charging for 142 calls (an illustrative figure); matching it against the phone log showed 14 recorded sales calls, 6 wrong numbers and 3 calls that rang off in under ten seconds. At $10.50 each, those 23 calls came to about $240 in the first month. The fix was a caller ID setting on the forwarded line, so the service could see and exclude spam, and a written note on how short calls are billed.
- What happens in a surge? A human service may queue callers when a campaign lands; an AI may hit a minutes cap mid-month. Ask what callers hear in each case. Consider a dog-grooming salon, as an illustration, on a 200-minute AI plan that sends a Christmas booking reminder to its whole list on Monday 5 October. About 60 extra calls arrive that week, the allowance runs out on 19 October, and for the rest of the month calls fall through to voicemail. Nobody notices until the phone bill shows a jump in voicemails and a regular mentions she rang three times. Ask whether the plan warns you at 80% of the allowance, and schedule big mailings for the start of a billing month.
- Can I hear or read every call? Recordings or transcripts let you spot bad answers early. Ask how long they're kept and where.
- How are my instructions updated? When your prices or policies change, how fast does the script or AI change, and who makes the edit?
- What's the notice period? Month-to-month lets you run a trial safely; a 12-month minimum doesn't.
- How do callers reach a person? For AI, test the transfer yourself. For a human service, ask how they escalate an emergency or a complaint out of hours.
A provider who answers all seven clearly is usually easier to work with than a cheaper one who is vague on two or three. If an AI receptionist does get a booking wrong once you're live, the recovery steps in what to do when an AI receptionist gets a booking wrong will help you fix it with the client and prevent a repeat.
Which to choose, by the calls you actually get
Choose an AI receptionist if routine calls are most of your volume and it can book into your system. Choose a human service if high-value or sensitive calls dominate, or your clients expect a person. Choose a hybrid, which most booking-based businesses end up with, when both kinds of call are common: let the AI take the routine work and make sure every call worth real money reaches a person quickly.
Follow-up questions before you switch
Can I try an AI receptionist without cancelling my answering service?
Yes, and it's the safest way to switch. Route only after-hours calls, or only one call type, to the AI for a month while the human service keeps the rest. Compare error rates and caller complaints between the two before moving more calls across, and check your answering service's notice period so you aren't paying twice for long.
Do callers hang up on AI receptionists?
Some do, especially older callers or anyone expecting a person. A clear greeting that says it's an automated assistant, a quick route to a human, and short confirmations help. Track calls that end within the first 20 seconds during your trial; if that share is high for one caller group, route those numbers or times to a person.
What about calls about allergies, injuries or other sensitive matters?
Set the AI to hand these to a person, never to answer them. A wrong answer about an allergen or a health condition can cause real harm and liability. Write the rule plainly in the receptionist's instructions, test it with several phrasings, and ask your insurer or adviser if your business handles health information routinely.
Further reads
- AI or Human Answering Service: Which Suits a Property Manager? — The same decision worked through for property managers.
- Can AI Answer My Business Phone? What It Can and Can't Handle — What AI phone agents can and can't handle, in plain terms.
- How to Set Up Missed Call Text Back for a Service Business — A cheaper fix if the problem is only missed calls.
- AI Call Summaries: Log Every Phone Enquiry in Your CRM — Get every call logged in your CRM automatically.
- How Much Does an AI Receptionist Cost for a Small Business? — AI receptionist pricing models in more depth.
- AI Receptionist vs Front-Desk Hire: The Real Cost for a Salon — The comparison with hiring someone for the desk.
- AI Phone Answering for Restaurants: What It Costs and Pays Back — Published prices for restaurant AI phone answering, the costs that never make the pricing page, and a payback calculation built from your own missed calls.
- DIY or Get Help? Setting Up AI Bookings for a Small Business — Six questions that tell you whether to build AI bookings yourself, with three worked cases and a weekend plan if you go it alone.
- Can AI Answer the Phone and Take Restaurant Reservations? — How AI voice agents book, change and cancel tables, which calls they must pass to staff, and a twelve-call test before you trust one.
- Can a Barbershop Use AI to Take Phone Bookings Between Cuts? — How to stop picking up mid-fade: three ways to let AI take barbershop phone bookings, plus the walk-in and booth-renter rules it needs.
- Can AI Answer Calls and Qualify Leads for an Insurance Agency? — How an AI voice agent should route, qualify and score insurance calls, the phrases it must never say, a 20-call test plan and what it costs to run.
- What Does an AI Receptionist Cost a Dental Practice in 2026? — Published AI receptionist prices, every line on a dental practice's bill, three budgets by practice size, and the questions that expose the real quote.
- AI Receptionist vs Front Desk Hire: A Dental Practice Comparison — What a dental front desk really does, where an AI receptionist beats a hire and where it can't, and a worked decision for a practice replacing a leaver.
- AI Receptionist or Chatbot: Which Suits a Cleaning Company? — How to choose between an AI receptionist and a chatbot for a cleaning company, with an enquiry tally, prices and the intake script both need.
- AI vs Human Answering Service for HVAC Firms — When an HVAC firm should let AI answer the phone, when a person should, and why most end up with a hybrid that escalates emergencies.
- Can AI Triage Emergency Plumbing Calls Out of Hours? — How an AI phone agent can sort night-time plumbing calls into wake-me-now, first-thing and advice, with scripted safety lines and a test plan.
- AI Tools and AI Development: The Complete 2026 Guide — the AI hub, including every tutorial in the AI-for-business series.
Sources: Ruby pricing page; Smith.ai pricing pages for human and AI receptionist plans; Goodcall and My AI Front Desk pricing pages. Checked 27 September 2026.