How Much Does an AI Chatbot Cost for a Business in 2026?
Straight to the point: a simple AI chatbot for your website starts at CZK 4,900 per month. A chatbot that answers from your company documents (RAG) starts at CZK 9,900 per month. An agent connected to your systems — orders, bookings, CRM — starts at CZK 19,900 per month. On top of that, always add the consumption of large language model APIs, typically hundreds to low thousands of crowns monthly depending on conversation volume.
That is the short answer. The longer one depends on what exactly you expect from the chatbot — and that is precisely where it breaks down whether the investment makes sense, or whether you are buying an expensive toy that will mostly annoy your customers.
Three levels of AI chatbots (and their prices)
The word "chatbot" describes three very different things today. Before you start comparing prices, be clear about which level you need.
Level 1: FAQ bot — from CZK 4,900 per month
A chatbot that can answer frequent questions: opening hours, prices, return policy, contacts. Its source of knowledge is a manually prepared set of questions and answers, which the AI model can deliver in natural language — so unlike the old "click-through" bots, it understands a question phrased differently than you expected.
Good for: smaller e-shops, service businesses, websites with repetitive support questions.
Not good if customers need answers from extensive or frequently changing documentation — manual maintenance of Q&A pairs stops scaling there.
Level 2: RAG over company documents — from CZK 9,900 per month
RAG (retrieval-augmented generation) means the chatbot searches your documents for relevant passages before answering — manuals, policies, product sheets, knowledge base — and builds the answer on them. It doesn't answer "from memory" but from your materials, ideally with a link to the source.
Good for: companies with extensive documentation (manufacturers, B2B services, internal helpdesks) where employees or customers waste time digging through PDFs and intranets.
What the price additionally covers: processing and indexing documents, keeping the knowledge base up to date, evaluating answer quality.
Level 3: An agent connected to your systems — from CZK 19,900 per month
The highest level: a chatbot that doesn't just answer, but acts. It checks an order status in your e-shop, creates a booking, reschedules an appointment, opens a helpdesk ticket, writes a lead into the CRM. Technically it means connecting an AI model to your systems' APIs with carefully defined permissions.
Good for: companies with a higher volume of routine requests currently handled by people — booking changes, order status questions, simple complaints.
Careful: boundary design matters most here. What the agent may do on its own, what a human must confirm, and when it should hand the conversation over to a real colleague.
What makes up the price
| Item | Share of price | Note |
|---|---|---|
| Development and integration | 40–60 % | Connecting to web/app, conversation design, system integrations |
| Knowledge base | 15–25 % | Preparing, cleaning and continuously updating materials |
| Model API consumption | 5–15 % | Pay per volume — grows with conversation count |
| Testing and tuning | 10–20 % | Evaluating answers, handling edge cases |
| Operations and monitoring | 10–15 % | Hosting, logging, tracking quality over time |
For a one-off agency build, expect prices from CZK 150,000 for level 2 and from CZK 400,000 for level 3 — plus ongoing costs for operations and knowledge base maintenance. With the monthly subscription model, everything is in one payment, including continuous tuning.
API consumption: the only item that grows with success
AI chatbots have one peculiarity: the more they are used, the more they cost. You pay per token — simply put, per the amount of text the model reads and writes. So before the project, calculate:
- How many conversations per month do you expect? (Website traffic × typically 1–5 % chat usage rate.)
- How long will conversations be? (A FAQ question = a few exchanges; resolving a complaint = dozens.)
- What does the human alternative cost? (An average phone call or e-mail handled by a person costs CZK 50–150; an AI conversation costs single crowns.)
For a typical SMB website with thousands of visits per month, API consumption fits into hundreds of crowns. For customer support of a larger e-shop, it's low thousands — still a fraction of the cost of a single full-time position.
Risks the salespeople won't mention
Hallucinations. Language models can make things up. For a FAQ bot it's embarrassing; for a chatbot that promises a customer a non-existent discount, it's a problem. The solution is RAG with source links, restricting the conversation topic, and continuous answer evaluation — which is why "knowledge base maintenance" is a full budget item, not an optional extra.
Missing escalation to a human. The worst customer experience is a chatbot you can't escape from. Good design expects the bot to recognize when it's not enough — and hand the conversation over to a person with full context. That's not an AI failure; that's correct design.
Knowledge getting stale. You change your price list, terms, product range — and the bot answers according to last year. Without a process for updating materials, a useful assistant turns into a generator of disinformation about your own company within months.
When an AI chatbot makes no sense
Let's be fair — a chatbot isn't for everyone:
- You get a few questions a day. The time saved won't pay even the basic subscription. A good FAQ page is free.
- Your documentation doesn't exist or is a mess. RAG is only as good as the source material. Documentation first, bot second.
- You want one because everyone has one. First answer which specific routine task it should take over. If you don't have an answer, wait. AI for AI's sake is the most expensive way to look modern — more in our article on AI in mobile app development.
How to start smart
We recommend going level by level: start with a FAQ bot or RAG over your most-searched documentation, measure real usage and satisfaction — and only then add system integrations. The advantage of development for a monthly subscription is that the chatbot evolves continuously based on real user behaviour, not a year-old specification.
A chatbot rarely stands alone: it's usually part of a website, app or customer portal. If you're building the whole system, have a look at backend and API development or the overview of mobile app prices.
Summary
| Level | What it does | Price from |
|---|---|---|
| FAQ bot | Answers frequent questions in natural language | CZK 4,900/mo |
| RAG chatbot | Answers from your documents with source links | CZK 9,900/mo |
| Agent | Handles requests connected to your systems | CZK 19,900/mo |
Add model API consumption based on conversation volume — typically hundreds of crowns monthly for an SMB.
Want to know what a chatbot would cost for your exact case? Get an indicative price in our configurator, or book a consultation — we'll go through your materials and tell you straight which level makes sense for you and which would be money wasted.
