Siewei picks up when nobody on your side can. It understands the request, books the appointment straight into your calendar and handles customer data under the GDPR. Around the clock, weekends included.
We are Steven Siebert and Lars Weidner. We founded Siewei in Frankfurt so that businesses stay reachable, even when the team has no hand free.
Mia is the digital assistant of an example business. Talk to her right in your browser or give her a call — she picks up, understands the request and books an appointment. In English or in German. No recording, no sign-up.
Mia states at the start that she is a digital assistant. The conversation is neither recorded nor stored. More under AI transparency and Privacy.
Three tasks that cost every business time run automatically in the background from day one.
Whenever no one can pick up, Siewei answers the phone. Your callers hear a friendly voice instead of a busy signal, mornings, evenings and weekends.
Callers describe what they need and get a free slot right away. Siewei enters it in your calendar and sends the confirmation automatically.
We process all calls and customer data encrypted on servers in the EU. The basis is a data processing agreement under Article 28 GDPR.
Three tiers, cancellable monthly. We handle the setup at no extra charge.
For small teams that finally want to be reliably reachable.
plus VAT · cancellable monthly
For businesses with heavy phone traffic and several people in charge.
plus VAT · cancellable monthly
For larger teams, several sites and everything that does not fit a plan.
Personal consultation, quote to suit
Setup is included in every tier and you can switch at any time. Not sure which one fits? We work out your call volume together in the first conversation.
The same five calls, two very different outcomes. Click to compare.
Ms K. calls while the team is preparing for consultations. Busy signal, hangs up.
Mr M. wants to reschedule. No one picks up. He doesn't show — the slot is wasted.
A mother calls about her feverish child. On hold, hangs up after 4 minutes.
Someone asks for a quote. No answer — he calls a competitor.
A prescription query goes unanswered. Callback needed in the afternoon, time is short.
Result: 3 lost jobs, 1 frustrated customer, extra work in the afternoon.
Ms K. calls. Siewei picks up and books her appointment for Thursday, 10:15 am.
Mr M. wants to reschedule. Siewei finds a new slot and updates the calendar.
The mother with the feverish child is recognised as urgent and forwarded straight to your team.
The enquirer gets a friendly first appointment. He stays with you.
The prescription query lands as a short summary in your inbox.
Result: no call lost, and the team spent the whole morning with customers.
From the first ring to the confirmed appointment, without your team lifting a finger.
If no one picks up or the line is busy, Siewei takes over after a few seconds.
The assistant recognises the request, checks available times in real time and books the right appointment.
After every call a short note is waiting for you: who rang, what it was about, what was agreed. Anything urgent rings through to you instead.
Move the sliders to see what unanswered calls can add up to over a month.
A rough estimate is fine.
Simplified estimate based on 22 working days per month. Actual figures vary by business.
Automated call answering is now standard, and it pays off measurably.
of customer service teams already rely on AI
of them already answer calls with voice AI
of calls to small businesses otherwise go unanswered
reachable, with no hold music
Siewei came about because nearly every business runs into the same thing. The phone rings while the team is in a meeting or out on a job, and the call goes unanswered. Every missed call can mean a lost order — and possibly a customer who calls the next supplier.
We built a phone reception that prevents exactly that. It sounds natural, understands the request and books the appointment without your team lifting a finger.
More about us →
This is where we're based — serving businesses across Germany.
Book a free demo. You hear how Siewei sounds on your line, and you watch an appointment land in your calendar.
