Short answer: AI chatbot pricing comes in two basic shapes. Flat monthly pricing charges one predictable fee no matter how many people chat. Usage pricing charges per conversation, per message or per resolution, which means your bill rises exactly when your website gets busy. For most small businesses the flat model is easier to budget and easier to trust. Clerkzo is flat monthly from nineteen dollars a month, with no per-conversation billing.
What are you actually paying for?
Strip away the packaging and every AI chatbot vendor is charging you for some combination of four things: the model calls that generate answers, storage and search over your knowledge base, the dashboard and integrations around it, and support.
The interesting question is not what it costs them. It is what unit they choose to bill you in. That choice decides whether your invoice is boring or terrifying.
How does flat monthly pricing work?
You pay a fixed amount each month. The chatbot answers whoever turns up. The number on the invoice next month is the same number as this month.
The appeal is not that it is always mathematically cheapest. It is that it is knowable. You can put it in a spreadsheet in January and it will still be right in November. For a business owner deciding whether a tool is worth it, predictability is worth real money.
Flat pricing also removes a subtle and corrosive incentive. When every conversation has a price tag, you start rationing. You put the widget on fewer pages. You leave it off your busiest landing page. You quietly hope fewer people use the thing you bought to be used. That is a strange way to run a growth tool.
Clerkzo starts at nineteen dollars a month, flat, with a fourteen-day free trial for building and testing before you commit. There is a fuller breakdown on the pricing page.
How does per-conversation and per-resolution pricing work?
Usage pricing meters something and charges per unit. The common meters are:
Per conversation. Every chat session counts. This includes the visitor who typed "hi" and left, the person checking your opening hours for the third time, and your own team testing the widget.
Per message. Finer-grained, and it penalises the exact behaviour you want. A visitor who asks six thoughtful follow-up questions is a visitor who is seriously considering buying from you. Charging more for that is backwards.
Per resolution. Marketed as fairest, since you only pay when the bot successfully handles something. The catch is the definition of "resolved," which the vendor writes. Did the visitor leave satisfied, or just leave? Different vendors answer differently, and the answer is on their invoice.
Most usage plans also come with an included allowance and an overage rate. The allowance is what you compare when shopping. The overage rate is what you actually pay once things go well.
Why does usage billing punish you when you get busy?
Because your bill is a function of your traffic, and your traffic is not something you control precisely.
Think about when your chat volume spikes. You get written up somewhere. A post takes off. It is your busy season. You spend money on ads and the ads work. A competitor closes and their customers come looking.
Every one of those is a good day for your business. Under usage billing, every one of those is also an unexpected invoice. The tool sends you a bill for succeeding.
It gets worse, because volume and value are not the same thing. A viral post might send thousands of curious visitors who will never buy. You pay for all of them. Meanwhile the twelve conversations that actually turned into customers cost the same per unit as the noise.
And the failure mode compounds. Because the cost is uncertain, you under-deploy. You keep the widget off high-traffic pages to control spend. So the thing that was supposed to capture more leads from your website is deliberately hidden from your best traffic. You have optimised your bill instead of your business.
Flat pricing simply does not have this conversation. Busy month, same invoice. Put the widget on every page. Let it run.
What should you actually compare when shopping?
Headline price is the least useful number on the page. Look for these instead.
Is the meter tied to your traffic? If yes, model your worst-case month, not your average one. Ask what an unusually good month costs.
What counts as a billable unit? Get it in writing. Does a bounced session count? Do your own test chats count? Does one visitor returning three times count as one or three?
What is the overage rate? The allowance is marketing. The overage rate is the actual price.
What is gated behind higher tiers? Lead capture, custom fields, integrations and notifications are sometimes held back. A chatbot that answers questions but cannot collect a name is half a product. See lead capture for what that should include.
What happens to your data if you leave? Can you export your leads and conversations, and is your knowledge base yours?
Is there a free trial? Yes — a 14-day free trial, which is the full product rather than a cut-down tier, so you can build the thing and test it properly before you decide.
Is the cheapest option the right one?
Not automatically, and here is the honest version. A chatbot that gives wrong answers is expensive at any price, because every bad answer is a customer who quietly leaves. A chatbot that never hands off to a human is expensive too.
The right frame is not cost, it is cost against outcome. If a chatbot captures one extra enquiry a month that you would otherwise have lost, and your average customer is worth more than the subscription, the maths stops being interesting. Most service businesses clear that bar with room to spare, which is why the question of whether you need a chatbot usually answers itself.
What you want is enough accuracy to be trusted, enough control to fix mistakes, and a bill you can predict.
Frequently asked questions
Is per-resolution pricing fairer than per-conversation?
It sounds fairer, because it ties cost to success. But the vendor defines "resolution," and definitions vary. Before you accept the framing, ask exactly which outcomes are billable and get an example of a chat that would and would not count.
Why do some vendors hide pricing behind a demo call?
Usually because the price depends on volume, or because they want to anchor it against your budget rather than a published number. It is not automatically a red flag, but a published price you can read without booking a call tells you something about how the company operates.
Should I start on the free trial?
Yes, if there is one. Build it, crawl your site, and test it in the playground with your real questions before you pay anything. Clerkzo gives you a fourteen-day free trial for exactly that, and paid plans start at nineteen dollars a month flat.
Clerkzo is an AI chatbot for your website with flat monthly pricing and no per-conversation billing. One script tag, live in about ten minutes. See the plans.