Case study

AI agents,
when nobody can answer

An agent on the phone, one on the website and online booking, built for Swiss small businesses. Here are the choices I made, what I removed and what they do not do.

Learn more →
Voice agent page on app.synthcraft.dev
The AI agent open in a conversation on mobile
Channels
Phone, chat, booking
On the phone
FR, DE, IT, EN
Price
From CHF 290/month
Setup
Up to 2 working days

The need

Sunday. Nobody in the office. Someone calls.

A small business cannot answer everything. A customer who reaches the voicemail in the evening or at the weekend often calls the next one.

The agents cover those moments:

  • On the phone: the agent answers, understands the request, offers a free slot and confirms by SMS. You get the recording, the transcript and a summary.
  • On the website: the chatbot answers from your documents and cites its source. Installation takes about 30 minutes.
  • For appointments: your customers book themselves and get an SMS reminder.

My choices

What I decided, and what I removed

The agent only answers when nobody picks up. Calls reach it through conditional forwarding. You keep your number and your habits, and it only steps in where you would have lost the call.

I removed live takeover. The plan was for a person to be able to take over a conversation in progress. In June 2026 I realised that was a mistake: a physio or a salon does not watch a dashboard all day. So the agent records the request and promises a callback, which matches how these businesses work.

It does not guess. Without reliable information it says so and passes the request on, and it never invents a name or an answer.

An AI can be manipulated, so I treated it that way. In July 2026 I hardened the agents against manipulation attempts and had what the model fills in checked before any booking or notification.

The limits

What these agents do not do

Better to know before you start:

  • The voice agent does not call your customers: it takes incoming calls, and reminders go out by SMS.
  • Medical or legal advice and price negotiations always stay with you.
  • The WhatsApp agent is not available yet: it is waiting for Meta's verification.

The best way to judge them is to try them on app.synthcraft.dev, or see all the automations.

Which calls are you losing today?