guide
20 Questions to Ask an AI Customer Service Vendor Before You Sign
Five of these change the contract. The rest change what you expect.
Fifty-nine of the seventy-eight platforms we track will not publish a rate. That makes the sales call the only place your terms get decided, and most buyers arrive at it with feature questions.
These are the twenty that matter, in the order they cost you money.
Ask the first five before the demo
Not after. A demo is designed to create investment, and a quote that arrives after two weeks of evaluation lands into a process you are already committed to. That is the point of the sequence, and reversing it costs you nothing.
Billing — the five that change the contract
1. What exactly triggers a billable event? In writing.
The single most important term and the one least likely to be published. Push for specifics: what happens when a customer abandons mid-conversation, and what happens when the same person returns three days later about the same issue.
A good answer is a written definition with edge cases. A bad one is a description of the general concept.
2. Is a conversation the AI escalates to a human billed?
Some vendors charge for the attempt. If yours does, your cost rises when the AI performs worse, which is worth knowing before you tune the confidence threshold.
3. What does this cost at three times our current volume?
Ask them to model it rather than quoting a rate. Most evaluations compare rates at today's volume, sign a three-year term, and discover the shape of the deal eighteen months in.
4. If we improve our documentation and the resolution rate rises 20 points, what happens to the invoice?
The best question on this page. Under per-resolution billing the answer is that it goes up — the model charges for success, so every improvement you make raises the bill.
A vendor who has thought about that misalignment will have a real answer: a volume tier, a cap, a blended rate. One who has not will change the subject, and that is information.
5. What is the renewal rate, and is there a cap on increases?
A first-year discount that resets is the most common shape of a bad deal in this category. Get the cap in the contract, not the email.
Capability — what the demo will not show you
6. Can it query our systems, or only read our documentation?
The dividing line for the whole category. A tool that answers from your help centre cannot tell a customer where their order is — it can only describe your shipping policy.
7. What does building our first custom action involve, and who does it?
Anything touching your systems is engineering. One to three weeks for the first action is realistic, and it never appears on a pricing page.
8. How does it authenticate a customer before acting on their account?
The prerequisite for everything valuable, and usually the longest item on the implementation timeline.
9. What happens when it does not know?
Ask them to demonstrate it, not describe it. Request something slightly outside the documented scope and watch. A constrained system declines; a freely generating one improvises, and you have just seen your failure mode.
10. Can we see the questions it could not answer, as a list?
Underrated. A platform that surfaces its failures hands you a prioritised content backlog. One that reports only a deflection percentage is hiding the most valuable output it produces.
Evidence — testing the claims
11. Your published resolution rate — what does it count, over what window, and on whose traffic?
Headline figures in this category range from 59% to over 90% and none are audited. Three of four are usually ceilings rather than averages, and several are scoped to a subset chosen because it automates well.
12. Is the resolution you bill me for the same event as the resolution in your case studies?
Frequently the same definition sets both. A generous reading inflates the marketing number and the invoice simultaneously — not necessarily deliberate, and a genuine conflict worth naming out loud.
13. Can we run this against our own historical tickets before committing?
Simulation against real past conversations is the only evaluation that means anything. Some platforms offer it natively; the rest should let you approximate it during a trial.
14. Which of your reference customers is closest to our ticket mix and volume?
Ask for the closest, not the most impressive. An enterprise deployment with vendor-led implementation tells you nothing about your self-serve rollout.
Ownership and exit — the five nobody asks
15. Who owns you, and has any acquisition been announced?
Six platforms in this category changed hands since 2024. If your term is three years, ownership changing during it is closer to likely than not.
16. If you are acquired, what happens to our contract and our rate?
Get the answer in the agreement. The acquirer is not bound by a reassuring sentence in an email.
17. What can we export on exit, and in what format?
Conversations, configuration, and the knowledge you fed it. The third is the one teams forget and the one that took the longest to build.
18. Is implementation included, and if not, what does it cost?
At the enterprise end it is a separate quote and can rival first-year licences. Ask who does the work — vendor, partner, or you — because that decides your dependency as much as your bill.
19. What is the minimum term, and what happens if we want out at month six?
Ask before you are attached to the product. The answer is much harder to get later.
20. What are you bad at?
The most revealing question on the list. Every product in this category has a weak case — angry customers, technical diagnosis, undocumented questions, edge cases.
A vendor who names one specifically has thought about where their product fits. One who says it handles everything has told you they will not warn you when it does not.
The five to ask first
If you only get one call: 1, 4, 5, 15 and 20. Billable event, what happens when the AI improves, renewal rate, ownership, and what they are bad at.
Those five determine your invoice, your exit and your expectations. Everything else can be established during a trial.
Drawn from reading published pricing, billing terms, acquisition filings and vendor claims across 78 platforms. We take no money from any vendor, which is why this page exists at all — nobody selling one of these tools has a reason to write it.
Frequently Asked
What should I ask an AI customer service vendor?
Five things decide the contract: what triggers a billable event, whether escalated conversations are billed, cost at three times your volume, what happens to the invoice when your resolution rate improves, and the renewal rate with any cap.
What is the most important question to ask?
What exactly triggers a billable event, in writing — including abandonment mid-conversation and a customer returning days later. It determines your invoice and it is almost never published.
Why ask what happens if our resolution rate improves?
Under per-resolution billing the answer is that your bill goes up, because the model charges for success. A vendor who has thought about that will offer a volume tier or a cap; one who has not will change the subject.
Should I ask about acquisitions?
Yes. Six platforms in this category changed hands since 2024, so on a three-year term ownership changing is closer to likely than not. Get the contract and rate protection in writing, not in an email.
How do I test a vendor's resolution rate claim?
Ask what it counts, over what window, and whose traffic it was measured on. Most headline figures are ceilings rather than averages, and several are scoped to a subset chosen because it automates well.
What should I ask before the demo rather than after?
All the billing questions. A demo creates investment, and a quote arriving after two weeks of evaluation lands into a process you are already committed to.
How do I know if it can handle my tickets?
Ask whether it queries your systems or only reads documentation, then ask to run it against your own historical tickets. Simulation on real past conversations is the only evaluation that means anything.
What is a good answer to 'what are you bad at'?
A specific weak case — angry customers, technical diagnosis, undocumented questions. A vendor claiming it handles everything has told you they will not warn you when it does not.
Should I ask about data export?
Yes, and specify three things: conversations, configuration, and the knowledge base you built. The third is the one teams forget and the one that took longest to create.
Why do so many vendors refuse to publish pricing?
Fifty-nine of seventy-eight in this category do not. Reasons range from genuinely custom deals to price discrimination and avoiding public undercutting, and only the first is about product complexity.
Tools Mentioned
Full reviews, pricing tiers and where each one breaks.
Decagon
Enterprise agent with deep configurability. Sales-led, so expect a procurement cycle rather than a signup form.
Ada
Multi-channel agent that predates the current wave, with the enterprise footprint that implies.
Sierra
Bespoke enterprise builds with unusually natural conversation, and the only one in this group that handles voice properly too.
Fin (formerly Intercom)
SalesforceThe most polished autonomous agent on the market, attached to the pricing model buyers complain about most — and now being bought by Salesforce.
You Can Also Look Into
Only 19 of 78 AI Customer Service Vendors Publish Their Pricing
The full count across 78 platforms, the categories where transparency collapses entirely, and what a hidden price actually costs you.
How to Choose an Enterprise AI Customer Service Vendor (2026 Checklist)
Four platforms will make your shortlist and none will tell you what they cost. Here is what to compare instead, including which are likely to still be independent in three years.
Per-Resolution Pricing Explained - Why Your Bill Grows as the AI Improves (2026)
The billing model most of this category adopted has a structural flaw: the better your AI performs, the more you pay.
6 AI Customer Service Platforms Acquired Since 2024 (and What Changed)
Salesforce is buying Fin for $3.6B. Zendesk alone has bought three, and one of those no longer exists as a product you can buy. If you are signing three years, read this first.
SOURCES
WRITTEN BY AR · UPDATED 2026-08-04
I read the fine print. Vendor pricing pages, billing definitions, terms, funding filings and acquisition notices — then I do the arithmetic nobody publishes: what a platform actually costs at your volume, what its headline metric is really counting, and who owns it now. I do not run benchmarks, and no page here pretends otherwise.