How Much Does an AI Chatbot Cost? A Clear Breakdown

Most people asking this question have already seen two answers that cannot both be true: a vendor page promising a chatbot from a few dollars a month, and a forum thread where someone is paying several hundred. Both are real. The difference is not the chatbot. It is the pricing model behind it, and the fees that only appear once you are live.

This guide explains the four ways vendors charge, what actually drives the cost of a website chatbot, and a method for sizing a plan that you can do in ten minutes with your own inbox.

The four pricing models

Almost every chatbot product on the market bills in one of these ways.

Flat monthly plan. A fixed price for a set of limits: so many chatbots, so many sources, so many messages per day or month. Predictable, easy to budget, and the model that suits most small sites. Cortexvia uses this one, with plans shown in your local currency on the pricing page.

Per seat. You pay for each team member who can log in and reply, and the AI is often an add-on. This model comes from live-chat and helpdesk software. It makes sense if you have a support team; it makes no sense if the whole point is that nobody needs to be in the inbox.

Per conversation or per message credit. A bundle of conversations or credits per month, with overage charges when you run out. Cheap when quiet, expensive when busy, and the bill moves in the wrong direction: the better the chatbot does its job, the more you pay.

Per resolution. Some AI agents charge each time the AI closes a conversation without a human. The sticker price is low and the effective price is unknowable until the end of the month.

If you remember one thing from this article, remember to ask which of these four you are looking at before you compare any numbers.

What actually drives the cost

Underneath every model, a handful of factors decide what a vendor needs to charge.

• Messages. Every answer costs the vendor model inference. Plans cap this as a daily or monthly allowance.
• Sources and storage. More documents and pages mean more indexing and storage. Plans cap the number of sources and the file size.
• Model quality. Faster or more accurate models cost more to run. Some vendors let you pick; some bundle a fixed one.
• Team features. Seats, inboxes, and human handoff tooling add cost whether you use them or not.
• Branding removal. Removing the vendor badge from the widget is often a separate paid step. Check whether the plan you are pricing includes it.

Cheap plans are cheap because they are tight on the first two. That is fine, as long as you know where the ceiling is before you launch.

The fees that hide behind the sticker

Three costs regularly turn a cheap plan into an expensive one.

1. Overage. Per-conversation plans quote the bundle price, not the price after your best month. Read the overage rate before the plan price.
2. Currency conversion. If a vendor bills in a currency other than yours, your card issuer adds a conversion fee and the amount moves with the exchange rate. A plan priced in your own currency costs what it says. Cortexvia shows and charges the same local amount, so the number on the pricing page is the number on the receipt.
3. The feature behind the paywall. The thing you actually need, such as removing the badge, adding a custom domain, or connecting a second website, sits one tier up. Price the tier that has it.

Free tiers: what they are actually for

A free tier is not a smaller version of the product for people who refuse to pay. It is the evaluation. Use it to answer the only question that matters: does this chatbot answer well on my content?

Upload the document or page that covers your most common questions, ask those questions in your customers' words, and read the answers. If they hold, paying is a low-risk decision. If they do not, no plan price would have fixed that. Our free plan exists for exactly this.

How to size your plan in ten minutes

You do not need a forecast. You need your inbox.

1. Count the questions you answered by email or chat last week that a page on your site already answers. Multiply by roughly seven to estimate weekly volume once a chatbot is visible on every page; visitors ask a widget far more often than they email.
2. Divide by seven for a daily figure and compare it with each plan's daily message allowance. Pick the plan with headroom, not the one that fits exactly.
3. List the sources you would add: which pages, which PDFs, roughly how large. Check the source and file-size limits.
4. Decide whether you need the badge gone and whether you need a custom domain. Those two decide the tier more often than volume does.

Then launch on the free tier anyway, because step one was a guess and a week of real traffic will replace it with a number.

A worked example

A small online store gets about forty emails a week asking about shipping times, returns, and whether an item is in stock. All three are answered on existing pages. Seven times forty is roughly 280 questions a week, or forty a day. A flat plan with a daily allowance comfortably above forty covers it; the shipping and returns pages plus a product FAQ fit inside a modest source limit. That is the entry paid plan for most vendors, and the whole evaluation took less time than reading this section.

Questions worth asking any vendor

• Which of the four pricing models is this, and what happens when I exceed the allowance?
• Is the price shown the price charged in my currency?
• Is badge removal included, and at which tier?
• Can I add a second website or chatbot on this plan?
• Does the plan auto-renew, and what happens to my chatbot if I let it lapse?

Cortexvia's answers, for the record: flat plans, priced and charged in your local currency, no auto-renewal, and upgrades that only charge the difference. The current numbers are on the pricing page and the comparison with other vendors is on the cheapest chatbot page.

Frequently asked questions

Is a free chatbot good enough for a business website? For a quiet site, often yes. The constraint is the daily message cap and the vendor badge, not answer quality. Launch free, and upgrade when the cap becomes the bottleneck.

Why do enterprise chatbots cost thousands a month? Custom integrations, dedicated support, contractual uptime, and per-resolution AI fees. None of those are relevant to a website that needs its FAQ answered.

Should I build my own instead? Only if the chatbot is your product. Model API fees, hosting, and the engineering time to keep it grounded and safe add up to more than a plan within the first month, and you still have to maintain it.

The honest summary: the right chatbot plan is the cheapest one whose limits you will not hit next month, priced in your own currency, with the features you need on the tier you are paying for. Everything else is marketing.