AI phone answering for restaurants: how it works, what it costs and how to choose (UK)

What is AI phone answering for a restaurant?

AI phone answering is a virtual receptionist that answers your restaurant's phone when your team can't, or on every call, and handles the routine ones itself. For most restaurants that means table bookings, changes and cancellations, opening hours, directions and menu questions.

It is not the old “press 1 for bookings” menu. The caller speaks normally, the system understands the request, checks your diary or booking sheet, and replies in a natural voice. The best tools are built around a restaurant's real constraints — covers per slot, sitting lengths, closed dates — rather than a generic appointment calendar.

It also isn't a replacement for front of house. The point is to catch the calls that ring out during service, before opening and after close, so your team can stay with the guests in the room.

How does an AI answering service work on a real call?

Your calls are diverted from your existing number to the AI service, which listens, works out what the caller wants, checks your availability and replies in a natural voice. You normally keep your number; a divert on busy or no answer is set up with your phone provider.

A typical booking call looks like this:

• Greeting that names the restaurant and says it's a virtual assistant.
• Caller asks for a table for four on Friday at 8pm.
• The system checks covers already booked for that slot, your sitting length and opening hours, and either confirms 8pm is free or offers the nearest free times.
• It takes a name and mobile number, then reads the booking back in full and waits for a clear “yes”.
• The booking lands in your diary or spreadsheet, the guest gets a confirmation text, and your team can see the call summary and transcript.
• If the caller asks something it can't answer — or mentions an allergy — it takes a message or transfers to a team mobile instead of guessing.

What should an AI receptionist do — and never do — for a restaurant?

It should handle the predictable calls accurately and hand the risky or unusual ones to a person. The line between the two is where most of the difference between tools sits.

Things a restaurant AI receptionist should do well:

• Offer only genuinely free times, based on your covers per slot, maximum party size and closed dates — not just “the calendar looks empty”.
• Read every booking back and get an explicit yes before confirming. Same for changes and cancellations.
• Answer only from information you've approved: hours, address, parking, menu and prices, your policy on dogs or high chairs.
• Say “I'll pass that on” and take a message when it doesn't know.
• Never answer allergy or dietary-safety questions itself — hand them to someone who knows the kitchen that day.
• Never auto-book large groups above your limit, never take card numbers, and always admit it's an AI if asked.

The test of a restaurant AI isn't how well it answers what it knows. It's what it does with the question it doesn't.

How much does an AI receptionist cost for a restaurant?

Expect anything from around £10 a month plus a per-call fee to several hundred pounds a month, depending on whether you pay per call or per minute, how many minutes are included, and whether booking tools are part of the package. Prices below are from each provider's public pricing page as of September 2026; check whether VAT and setup fees are included.

• The VoIP Shop (UK): £10 a month plus 85p per call, £30 a month including 50 calls, or £120 a month including 200 calls, then 85p per extra call.
• HeyGuest (UK): from £100 a month per location per module, which suits restaurants already on ResDiary or OpenTable.
• VoiceFleet (Ireland/UK): €99, €299 or €599 a month for 500, 1,000 or 2,000 minutes.
• Slang.ai (US): Core from $399 and Premium from $599 a month per location; no UK pricing is published.
• Stafff (UK pilot pricing): Overflow £149 a month with 300 minutes, answering when your team can't pick up; Full Service £299 a month with 1,000 minutes, answering every call including after hours. Extra minutes 20p. Excluding VAT, cancel any time.

Is AI better than voicemail, a human answering service or extra staff?

It depends on your call volume and what callers want. For a busy independent where most calls are bookings, AI usually costs less than extra hours and does more than voicemail; for complex events work, a person is still better.

Voicemail is free but many callers won't leave a message, and each one needs a call-back during your busiest hours. Human answering bureaux take messages in your restaurant's name, but most quote on request, and unless they're connected to your diary they take a message rather than a booking — so someone still has to ring back.

Extra staff are the gold standard for warmth and judgement, but the maths is hard for a small site. At the National Living Wage of £12.71 an hour (from April 2026), putting one extra person on the phone for three hours a night, six nights a week, is roughly £990 a month in wages alone — before employer's National Insurance, holiday pay and pension. If calls cluster at 7–9pm, that person is also needed on the floor.

How do you choose an AI receptionist for a UK restaurant?

Start from where your bookings live, then check how the tool handles the calls it shouldn't take. Price matters less than whether it fits the way your restaurant already works.

• Booking system: if you're on ResDiary, OpenTable or SevenRooms, look first at tools that integrate with it — some platforms now offer their own voice AI. If you use a paper diary or spreadsheet, you need a tool with its own diary or a Google Sheets link.
• Coverage: do you need overflow during service only, or every call including after hours?
• Handoffs: where do messages go, how fast will you see them, and can it live-transfer to a mobile?
• Setup: who loads your menu, hours and capacity rules — you, or the provider with you?
• Voice and accent: British voices and UK phrasing matter to regulars.
• Data: where is it hosted, is recording on or off by default, and is there a data processing agreement?

What questions should you ask in an AI receptionist demo?

Don't just watch a demo — ring the test number yourself and try to break it. The questions below take ten minutes and tell you more than any slide deck.

• Try to book a slot you've told it is full. Does it offer real alternatives?
• Ask for a table for 14. Does it hand over or just book it?
• Say “my son has a nut allergy — is the korma safe?” The only right answer is a handoff to staff.
• Ask something it can't know, like whether a named server is working tonight. Does it guess?
• Change your mind halfway through. Does the read-back catch it?
• Ask: what happens if two people ring for the last table at the same time?
• Ask: is the call recorded, where is the data stored, and how long are transcripts kept?