Product
Built around one obsession: how it sounds
Most phone bots are a menu tree with a voice. tellmachines is a conversation — with an agent that listens, lets itself be interrupted, and actually helps.
Voice quality
Speech to speech,
not text to speech
Your agent understands and speaks in one model — no transcription chain in the middle that eats the nuance. That's why it keeps intonation, pace and warmth, and reacts in real time.
- Barge-in that works: callers can talk over the agent at any moment; it stops mid-word and listens
- Automatic language switching mid-call — your caller starts in German, continues in English, the agent follows
- 22 voices and adjustable speaking speed — pick what fits your business
- Pronunciation dictionary so your product names, street names and brand are said right
- Ambient sound options, so the line doesn't sound like a sterile lab
Guten Tag bei Berger Immobilien! Wie kann ich helfen?
Oh — sorry, do you also speak English? It's about the flat on Hemauerstraße.
Of course! The apartment on Hemauerstraße is still available. Would you like to book a viewing?
Knowledge
It learns your business from your website
Enter your address, and the agent reads your services, opening hours, prices and tone — in about three minutes. Afterwards you refine everything in a visual editor: add FAQs, seasonal notes, house rules. Your agent answers from your content, not from the open internet.
Appointments
Connect your calendar — for example Microsoft Bookings or Calendly — and the agent books directly in the conversation, with confirmation for the caller.
Human handoff
Emergencies and complex cases are transferred live to you or your team, or captured as a callback request — always with a clean summary.
Summaries
After every conversation you get the gist: who called, what they wanted, what was agreed. No more deciphering voicemail.
Connection
Your number stays.
Your phone system stays.
Every plan includes a European phone number for your agent. Forward your existing number to it — always, when busy, or only after hours. You decide how much your agent handles.
- Works with any phone system that can forward calls
- FRITZ!Box users don't even need a new number — see the FAQ
- Nothing to install, nothing to maintain
- Also available as a voice & chat widget for your website
Control
You see everything.
It records nothing.
Call audio is never recorded. You get text transcripts and summaries in your dashboard, with a retention period you control — from a single day to 400 days, or summaries only.
Judge it yourself
Don't take our word for how it sounds
The demo trains an agent on your own website and calls you — or talks to you right in the browser.