Knowledge · phone

AI Phone Assistant for Businesses: Guide, Costs & Selection

What an AI phone assistant is, how it works, what it costs, and what matters when choosing one.

Every missed call is a customer who calls the next provider. Small and medium-sized businesses in particular can't take every call – during an appointment, in the workshop, in the evening, on weekends. An AI phone assistant closes exactly this gap: it answers every call, understands the request, and makes sure nothing falls through the cracks.

What an AI phone assistant is

An AI phone assistant is software that conducts phone calls on its own. It answers, greets the caller, recognizes the request, asks the right follow-up questions, and records the answers in a structured way. Depending on the case, it schedules an appointment, answers a standard question, forwards to the right person, or logs a callback request with all the important details. The difference from a classic answering machine message: a real conversation takes place in natural language – and the result is a clean note, not a full voicemail.

How it works

Technically, three steps come together in real time: speech recognition converts what is said into text, a language model understands the content and decides on the next question or action, and speech synthesis responds with a natural voice. For you as a business, what counts is the result: answered, understood, documented, forwarded.

Inbound and outbound – two very different tasks

Inbound means: taking incoming calls – round-the-clock availability, qualifying inquiries, taking down appointments, answering recurring questions. Outbound means: actively making calls, for example appointment reminders or lead qualification. Outbound is legally more delicate (consent) and should be used deliberately.

What it takes off your plate

• Calls outside business hours and during peak times
• Qualifying initial contacts (request, urgency, contact details)
• Taking down appointment requests and forwarding them in a structured way
• Answering recurring standard questions
• A clean call note instead of slips of paper, voicemail, or callback chaos

What matters when choosing one

There is no single "best" AI phone assistant – there is the one that fits your case. Five criteria are decisive in practice: data protection & hosting (servers in the EU, data processing agreement, deletion concept), German-language quality (natural voice, low latency, recognition of colloquial speech and dialects), use-case fit (inbound, outbound, or both), integration (connection to the phone system and workflows, notes where the team sees them), and fair billing (transparent, without unnecessary commitment). You can find a detailed side-by-side look at these criteria in the guide Comparing AI phone assistants.

What an AI phone assistant costs

Two pricing models are common on the market: a monthly base price plus a per-minute rate, or purely usage-based billing. More important than the list price is transparency. webRichtung phone bills usage-based according to the actual call duration from your wallet balance – with no base fee in the current model, no minimum term, and no subscription requirement. You can find a detailed breakdown of the pricing models in the guide What does an AI phone assistant cost?

Phone assistant, voicebot, or answering machine?

A voicebot is the umbrella term for voice-controlled software – on the phone, people speak of the AI phone assistant. A digital answering machine only records; an AI phone assistant holds a real conversation and delivers a usable result. How an AI answering machine fits in here is covered in its own guide.

When it's worth getting started

Whenever a missed call costs real money – in sales, in service, in appointment-based businesses. A good starting point is qualifying initial contacts: set up small, quickly tested, and from day one significantly fewer calls are lost.

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