4 min read · updated 2026-10-18
How much does an AI agent cost for a small business?
Short answer
A usable AI agent for a small business starts around $150 for a chat assistant trained on your own answers, and $300–$500 once it books from a live calendar or takes phone calls. Running costs are separate and usually small — typically a few dollars to a few tens of dollars a month in model and telephony usage.
The build price and the running price are different things
Most quotes you will see cover the build: designing what the assistant says, connecting it to your calendar or CRM, testing it, and handing it over. That is a one-off.
Running it is a separate, ongoing cost, and it is the one people forget to ask about. An assistant that answers text chat costs very little to run. One that answers phone calls costs more, because you are paying for the phone number, the speech-to-text, and the voice itself on top of the model.
Ask any developer to split the two in writing. A build price with no mention of running costs is an incomplete quote, not a cheap one.
What actually moves the price
Four things, roughly in order of how much they matter:
- Channel. Chat on your website is the cheapest. Voice on a phone number is the most expensive, because there are more moving parts and more ways to fail.
- Whether it writes anywhere. An assistant that only answers is simpler than one that books an appointment or creates a CRM record, because writing means handling failure — what happens when the calendar rejects the booking.
- How many answers it needs. Twenty well-written answers is a different job from two hundred, and the writing is usually the slow part, not the code.
- Escalation rules. Deciding what the assistant must never attempt, and what happens when it hits that line, takes real thought. It is also what makes the thing safe to put in front of customers.
A monthly product versus a fixed build
Public listings in October 2026 for hosted AI phone products cluster as a subscription. Entry plans are often around $49–$99 a month, fuller plans a few hundred dollars a month, and developer platforms charge per minute on top. People who build custom production systems commonly quote that work in the thousands, because the scope is a whole operation rather than a widget.
Those numbers are not comparable to each other, and neither is comparable to a fixed-scope package until you know which product you are buying. A subscription rents a receptionist. A build in the $150–$500 range on this site is a defined assistant — chat, then booking, then voice — that you keep, with a written boundary around what it may say.
Running costs stay separate either way. The model, and for voice the phone number and speech processing, still cost money after launch. At a small volume that is usually much smaller than a subscription, and any honest quote splits it from the build price.
What a low price usually means
A very cheap agent is normally a chat widget pointed at a general model with no boundary around it. It will answer anything, confidently, including things about your business that are not true. That is not a bargain; it is a liability with a monthly fee.
The expensive part of this work is not the model. It is deciding what the assistant is allowed to say, and building the handoff for everything else.
What I charge
For transparency, since this page is on my own site: $150 for a chat assistant trained on up to twenty of your own answers, $300 once it reads live calendar availability and books, and $500 for voice on a phone number with CRM records and full escalation handling. Each is a fixed scope agreed in writing before work starts.
Those are starting prices for the stated scope, not a ceiling. If your situation needs more, you get a written quote for that instead of a surprise later.
This is what I do: AI Agents & Voice Assistants — three packages from $150.
