AI Chatbot Pricing: Flat Rate vs Per-Resolution

AI support tools charge in one of four ways: per resolution, per AI conversation, per human seat, or a flat monthly plan. Most vendors combine two of them. The model matters more than the headline price, because it decides what happens to your bill in a busy month.

This guide uses prices from each vendor’s own pricing page, as of October 2026. If you are weighing Intercom against other tools, our guide to Intercom Fin alternatives goes vendor by vendor.

Model	You pay for	Example (as of October 2026)	Your bill grows when
Per resolution	Each conversation the AI closes	Intercom Fin, $0.99 per outcome	The AI handles more
Per AI conversation	Each conversation the AI replies in	Tidio Lyro, add-on from $32.50/mo for 50 conversations	More customers write in
Per seat	Each person on your team	Zendesk Suite Team, $55 per agent/month, paid yearly	Your team grows
Flat plan	A fixed monthly price up to a usage cap	ZynfoAI, $99/month for 5,000 conversations	You outgrow the cap

Per-resolution pricing: you pay when the AI closes the conversation

Intercom made this model popular with Fin. According to Fin’s pricing page, Fin costs $0.99 per outcome. An outcome is counted when a customer confirms the issue is resolved, when they don’t ask for more help after Fin’s answer, or when Fin completes a workflow, including a handoff to your team. It is charged at most once per conversation.

On Intercom’s own helpdesk, those outcome fees sit on top of seats. Intercom’s pricing page lists Essential at $29, Advanced at $85 and Expert at $132 per seat per month, billed annually. If you keep another helpdesk, Fin is still $0.99 per outcome, with a 50-outcome monthly minimum and no seat costs.

Zendesk uses the same idea under a different name. Its pricing page charges per automated resolution: a request the AI agent resolves without escalating to a person. Each plan includes a small allowance, 5 per agent per month on Suite Team and 10 on Suite Professional. Beyond that, automated resolutions cost $1.50 each on a commitment or $2.00 pay-as-you-go. Seats are separate: $55 per agent per month for Suite Team and $115 for Suite Professional, paid yearly.

The case for this model is fair. You pay when the AI does useful work, and a quiet month costs little.

The catch is that the vendor defines “resolved”. A customer who reads an answer and leaves can count as a resolution even if they simply gave up. And every improvement you make to the AI raises the variable part of your bill, so a sale weekend or a shipping delay shows up twice: once in your inbox and once on the invoice.

Per-conversation pricing: you pay when the AI replies

Tidio prices its Lyro AI agent by conversation, not by result. Tidio’s pricing page defines a Lyro conversation as any customer interaction, on any channel connected to Tidio, with at least one reply from the AI agent. The Lyro add-on starts at $32.50 a month for 50 conversations, and every plan includes 50 Lyro conversations once, to try it.

This is easier to predict than per-resolution pricing, because you can count conversations before you buy. The trade-off: you pay for the conversation whether the AI solved it or passed it to your team.

Per-seat pricing: you pay for people

Seat pricing is the older helpdesk model, and it still sits underneath most AI products. It makes sense when your main cost is your team, not your volume. It starts to pinch when you want a manager, a part-timer or the founder in the inbox to read transcripts. Check how many seats a plan includes before you compare AI prices. The seat line is often bigger than the AI line.

Flat-rate pricing: one price up to a cap

A flat plan costs the same whether the AI handles 200 conversations or 4,000. ZynfoAI works this way: $99 a month, or $990 a year, for the All-In-One Pro Plan. It includes 5,000 conversations a month, 11 team seats and one AI agent that answers on your website and WhatsApp. There is no per-resolution fee.

The honest caveat is the cap. A flat plan is predictable inside its limit, so size it against your busiest month, not your average week. If you regularly run well past 5,000 conversations, check your real numbers before deciding. Everything included is on our pricing page.

A worked example with hypothetical volumes

The volumes below are invented to show the arithmetic. The prices are the published ones above, as of October 2026. Your resolution rate and team size will be different.

Say a store has 3 people on support, and in one month the AI resolves 1,000 conversations.

• Intercom with Fin on Essential seats: 1,000 outcomes × $0.99 = $990, plus 3 seats × $29 = $87. Total: $1,077 for the month.
• Zendesk Suite Team: 3 agents include 15 automated resolutions. The other 985 cost $1,477.50 at the $1.50 committed rate, or $1,970 at $2.00 pay-as-you-go. Seats add 3 × $55 = $165.
• ZynfoAI Pro: $99, as long as total conversations stay within 5,000 that month. All 3 people fit inside the 11 included seats.

Now halve the volume to 500 resolutions. Fin’s outcome fees fall to $495, and Zendesk’s fall with them. ZynfoAI stays at $99. That is the real difference between the models: variable pricing follows your volume down as well as up.

The example leaves out things that matter just as much: which channels you need, which helpdesk you already pay for, and how well each AI answers your customers. A smaller bill is no help if the answers are wrong.

Which model fits your business

Per-resolution pricing fits teams with low or uneven volume, and teams already committed to Intercom or Zendesk as their helpdesk. A quiet month costs little, and you get a large support suite. Fin, for example, covers email, SMS and voice as well as chat, which ZynfoAI does not.

Per-conversation pricing fits teams that want to cap AI spend with a fixed bundle, and don’t mind paying for conversations the AI hands to a person.

Flat pricing fits small teams with steady volume who want to know the bill before the month starts, and who mostly talk to customers on their website and WhatsApp.

Questions to ask any vendor before you sign

1. What exactly counts as a resolution or a billable conversation?
2. Is a handoff to a person billed?
3. What happens when I pass my included volume: overage fees, an automatic upgrade, or a pause?
4. Which channels are included, and which cost extra?
5. How many seats come with the plan, and what does one more cost?

Put the answers next to your own monthly volume. Our chatbot ROI calculator helps with the numbers, and the Intercom Fin alternatives guide compares the main options side by side. You can also browse all ZynfoAI comparisons, including ZynfoAI vs Tidio.