AI chatbot for business: price, how it works and ROI
How much does an AI chatbot cost? How it works (LLM, RAG), price, ROI and concrete examples for SMEs.
Published on 8 June 2026 by Lumineth
An AI chatbot for business generally costs between 2,000 and 15,000 CHF depending on complexity, plus a monthly subscription. It automates support, qualifies leads and runs 24/7. Here is how it works, its price and its return on investment.
What is an AI chatbot?
An AI chatbot is a conversational assistant able to understand a question in natural language and answer it from your real content. Unlike old chatbots with rigid scripts, it relies on a language model (LLM) for fluent, relevant answers.
How does it work? (LLM and RAG)
The chatbot combines a language model with your own data via a technique called RAG (Retrieval-Augmented Generation): it retrieves the relevant information from your knowledge base (site, FAQ, documents) then generates an answer grounded in it. To go deeper, see RAG explained by AWS. This is what prevents made-up answers and keeps the chatbot true to your business.
How much does an AI chatbot cost?
| Type of chatbot | Setup | Subscription / month |
|---|---|---|
| Simple FAQ (guided answers) | 2 000 – 5 000 CHF | 50 – 150 CHF |
| Advanced (RAG, multi-channel, leads) | 5 000 – 15 000 CHF | 150 – 500 CHF |
| Custom (business integrations) | from 15 000 CHF | on quote |
Indicative ranges for the Swiss market — the price depends on scope, volume and integrations. A free audit allows precise costing of your project.
What ROI to expect?
The return on investment of an AI chatbot comes from several levers:
- Reduction of time spent on repetitive questions (up to −60%).
- Capture and qualification of leads outside business hours.
- Improved customer satisfaction thanks to an immediate answer.
- Valuable data on your customers’ real questions.
Usage examples
- Clinic: pre-qualification of appointment requests.
- Retail: order tracking and product questions.
- B2B services: lead qualification and initial contact.
The chatbot is just one of the possible uses: discover the others in our article AI for SMEs: 10 concrete use cases, and our AI solutions to put it in place. Its reliability rests on an AI knowledge base (RAG) built on your documents. For visibility, see also our GEO guide.
Can an AI chatbot save you time and win you customers? Lumineth, an AI agency in Geneva, assesses it during a free audit.
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Frequently asked questions
How much does an AI chatbot cost for a business?
In Switzerland, an AI chatbot generally costs between 2,000 CHF (simple FAQ) and 15,000 CHF or more (advanced, custom) to set up, plus a monthly subscription of 50 to 500 CHF depending on scope.
What is RAG in an AI chatbot?
RAG (Retrieval-Augmented Generation) means connecting the language model to your own data: the chatbot retrieves the relevant information from your content before generating its answer, which makes it reliable and true to your business.
What ROI to expect from an AI chatbot?
The ROI comes from the reduction of time spent on repetitive questions, the capture of leads 24/7 and improved customer satisfaction. Many businesses see significant time savings within the first few weeks.
How long does it take to set up an AI chatbot?
A simple FAQ chatbot is deployed in 2 to 4 weeks; an advanced chatbot with RAG and business integrations takes longer depending on scope.
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