Answering service vs AI receptionist: which is right for a plumbing business?
Daan van den Bergh
If you only need someone to take a message during office hours, a human answering service does the job. If you need the call to become a booked job at 2am as well, an AI receptionist does it at a flat price, and on the numbers below it costs less per call. Price a 2.5-minute call (the length Cira's rate guide assumes in its plumber example): one Dutch answering-service tariff comes to €3.15 once its monthly bundle is used up, while SwiftGuard's entry plan works out at €1.15 if you use all its minutes (ex VAT; the Dutch tariff is quoted as the vendor publishes it). The right answer still depends on how your business runs, so here's the reasoning.
What is an AI receptionist, and how is it different from an answering service?
A human answering service is a team of telephonists who answer your line, take the caller's details and pass you a message. Some will also book an appointment for you, which the booking section below comes back to. You pay a monthly fee plus a price per call (some plans include a bundle of calls first), and some services also bill by the second.
An AI receptionist is a voice agent that answers the phone, holds a natural conversation, captures the caller's details and problem, and books the job into your calendar while the caller is still on the line. SwiftGuard's runs around the clock for a flat monthly fee.
The real differences are the hours each one covers and what a long call costs you.
| Human answering service | AI receptionist (SwiftGuard) | |
|---|---|---|
| What you get | A message, or a booking if the service manages your diary | A job booked in your connected Google Calendar during the call |
| Example price | One Dutch service: €9.97 or €97 a month, plus €1.47 to €1.79 a call and €0.028 a second past 90 seconds | €69 a month ex VAT for 150 minutes, no overage charges |
| Hours | Office hours as standard at two Dutch services; evenings, weekends or 24/7 cost more a month | Around the clock, same price |
| Calls it can't handle | A person deals with them | A message for you to call back |
What does each one cost?
A human service prices per call, and some also by the second. One Dutch answering service publishes two tariffs: €97 a month with 65 calls included and €1.47 a call beyond the bundle, or €9.97 a month with nothing included and €1.79 a call. Both cover a call of up to 90 seconds. Past that they bill €0.028 per second, which is €1.68 a minute.
That 90 seconds is deliberate. The same service says it trains its telephonists daily to keep their average call under it, which suits a message. A plumbing intake is a different conversation. Name, address, what's leaking, whether the water is off, when you can get there. Cira's rate guide works its own plumber example off an average of 2.5 minutes a call. If your calls run that long, price one on the €97 plan once its 65 included calls are used up: €1.47 for the first 90 seconds, plus €1.68 for the minute that follows. That's €3.15 for one call, and €3.99 once it reaches three minutes.
An AI receptionist bills a flat monthly plan with call minutes included. SwiftGuard's entry plan is €69 a month ex VAT for 150 minutes, about €0.46 a minute if you use them all, so the same 2.5-minute call works out at €1.15. A call at 3am on a Sunday uses the same minutes as one at 10am on a Tuesday, and there are no overage charges. The flip side: the 150 minutes are a hard limit, so pick the plan that covers your busiest month. (There's a separate per-minute breakdown of AI receptionist costs in euros.)
A per-call service bills you more in exactly the week you're busiest. A flat plan bills the same in your quietest week and your maddest one, as long as its minutes last.
Which one actually books the job?
Both can. Mijn Telefoniste's tariff page says its telephonist can book an appointment for you, and its plans answer on weekdays from 08.30 to 18.00. For €50 a month more it adds weekday evenings until 21:00 and weekends from 09:00 to 18:00. Its priced plans stop at 21:00 at the latest, and it gives no price for nights. Telefoonaanname.nl also offers diary management, with its telephonists booking appointments for you, and it sells round-the-clock cover for €135 a month plus a charge per call.
Where the telephonist only notes a callback request, the booking is still yours to make: you call back, check your diary, agree a time and put it in yourself, whenever you next get a moment.
An AI receptionist checks your availability and books the appointment during the call, at any hour. SwiftGuard offers the caller real open times from your connected Google Calendar and confirms the one they pick, so they hang up with a slot and you see it in your calendar. (Here's what that looks like end to end.) For a trade, that booking on the call is the part worth paying for.
Which is cheaper at nights and weekends?
The AI, by a distance. Telefoonaanname.nl's tariff page prices office hours (weekdays 08:00 to 18:00) at €50 a month and round-the-clock cover, public holidays included, at €135 a month. Both prices come before the per-call charge: €2.75 a call if you get up to 75 calls a month. And if a call arrives outside the hours you pay for, it lands in your own voicemail box. Burst pipes and water through the ceiling don't keep office hours, so that's the gap you'd be paying to close.
The per-second service from the cost section shows the same pattern. Its standard tariffs don't mention nights, and its 24/7 package costs €59.97 a month, with €1.79 a call between 08:00 and 22:00 and €3.47 between 22:00 and 08:00, plus the same per-second charge past 90 seconds. And because every tariff here charges per call, a hard frost that triples your calls grows that line on your invoice with them.
An AI agent doesn't sleep and doesn't charge overtime. At 2am SwiftGuard answers as it does at noon, at the same flat cost, for as long as your plan's minutes last. (If you're not sure how many of those calls you're already missing, start with how many calls plumbers miss.)
When is a human answering service still the better choice?
When the call needs a person more than it needs a diary slot. Humans are better at some things:
- Genuinely unusual calls that fall outside any normal flow.
- Emotional handling when a customer is upset and wants to be heard by a person.
- Complex back-and-forth that benefits from human judgement.
SwiftGuard's agent books new jobs and notes which ones are urgent. It can also look up a caller's existing booking, or cancel it. When a call falls outside that, or no slot fits, it takes a message so you can call back. If your call mix is unusually complex or sensitive, a human still has a place.
How to choose
Ask three questions:
- Do you want messages, or booked jobs at any hour? Booked jobs at any hour → AI.
- Do you need nights and weekends covered? Yes → AI, on cost alone: the round-the-clock plan above is €135 a month before a single call is answered.
- Is your call volume spiky or growing? Yes → AI, as long as you size the plan to your busiest month, because a flat plan doesn't grow with each call.
For a plumbing or heating business that wants the job booked whenever the phone rings, that points to an AI receptionist. The work doesn't keep office hours, and whoever answers for you shouldn't either.
That's what SwiftGuard does: it answers your calls and, once your Google Calendar is connected, books the job into it while you stay on the tools. When you're ready, see the plans and set them against what one missed emergency job is worth to you.