AI customer support costs $0.49 to $2.00 per answer, but the headline rate is the least important number on the bill. Intercom Fin charges $0.99 only when it resolves a conversation; Zendesk charges $1.50 to $2.00 per automated resolution after a small allowance; Freshdesk Freddy charges $0.49 per session whether it resolves anything or not; Tidio Lyro charges about $0.70 per conversation it touches. For a small business, the billing unit decides the monthly total more than the brand does.

AI customer support means an AI agent answering customer questions in chat or email without a human. The four tools here β€” Intercom Fin, Zendesk AI agents, Freshdesk Freddy and Tidio Lyro β€” do roughly the same job and all bill by usage, not by seat. Now you compare what counts as a billable unit: the same 500 conversations can cost $245 or $553 depending on the definition you buy. Prices below are list prices read on 7 November 2026, in US dollars, before tax.

The numbers at a glance

ToolBilling unitUnit priceSeat or plan underneath
Intercom FinPer outcome$0.99Essential $19/seat/mo (listed down from $29); 50-outcome monthly minimum standalone
Zendesk AI agentsPer automated resolution$1.50 committed, $2.00 pay-as-you-goSuite Team $55/agent/mo; 5 resolutions per agent/mo included
Freshdesk FreddyPer session (resolved or not)$0.49 ($49 per 100)Growth $19/agent/mo; 500 sessions free once
Tidio LyroPer conversation the AI replies to$0.70–$0.78Starter $29/mo for 100 conversations; 50 Lyro conversations free once
Help Scout AI AnswersPer resolution$0.75Standard $25/user/mo

Two rows deserve a second look. Freshdesk’s $0.49 is the cheapest unit and the only one that bills you when the AI fails. Zendesk’s $1.50 is the dearest unit and sits on the dearest seats. The rest of this article works out what those facts do to a real bill β€” and the real cost of an AI tool is rarely the number on its pricing page.

What does “per resolution” actually mean?

Every vendor uses a different word for the same idea, and the definition is the product. Intercom counts a Fin outcome when a customer confirms the issue is resolved, when the customer stops asking for more help after Fin responds, or when Fin completes a workflow β€” at most one charge per conversation. That is from Intercom’s own pricing page, read on 7 November 2026.

Zendesk counts an automated resolution only when the AI settles the request without escalation. Since 18 May 2026, assisted escalations and unverified contained resolutions are not billed β€” a fairer definition, and the reason Zendesk’s rate looks high. Freshdesk does not count resolutions at all: a Freddy session is a 72-hour email window or a 24-hour chat window, billed whether the issue is resolved or not. Freshdesk’s own pricing page states the window and the $49-per-100-sessions pack, and its FAQ confirms the 500 free sessions are a one-time pool. Tidio counts a Lyro conversation when the AI replies at least once; a dozen replies still count once.

The test is simple: take last month’s conversations and ask how many the AI would touch, resolve, and escalate. If your resolution rate is low, per-session and per-conversation models punish you. Whichever model you pick, keeping the human touch in AI customer service is what stops a cheap AI bill from becoming an expensive reputation problem.

Intercom Fin

Fin is the best-known AI support agent: $0.99 per outcome, no seat fee standalone on your existing helpdesk, with a 50-outcome monthly minimum β€” about a $49.50 floor. On Intercom’s own helpdesk, seats stack on top: Essential $19 per seat a month, shown discounted from $29, Advanced $85, Expert $132. Copilot is a further $29 per agent a month; a 14-day free trial needs no card.

The minimum is the part small businesses miss. A quiet shop with 30 conversations a month still pays for 50 outcomes. At 500 conversations and a 60% resolution rate, the AI line is 300 Γ— $0.99 = $297, so the minimum never bites. Our guide to building an AI customer support system with no code covers the knowledge-base work that decides whether Fin resolves anything at all.

On resolution rates, Intercom’s own pages disagree: its comparison page claims a 76% average across 12,000+ customers, while other trackers cite 67% from its earlier reporting. Both are vendor-reported, not audited. Our calculator defaults to 60%, below both claims.

Zendesk

Zendesk’s seats are the most expensive of the four: Support Team $19, Suite Team $55 and Suite Professional $115 per agent a month on annual billing, confirmed on Zendesk’s pricing page on 7 November 2026. The cheapest plan with AI agents is Suite Team at $55, so a two-agent team starts at $110 a month before the AI bills a cent. Copilot is another $50 per agent a month.

The AI line is $1.50 per automated resolution on a committed volume or $2.00 pay-as-you-go, after 5 resolutions per agent a month on Suite Team (10 on Professional), capped at 10,000 a year. Those rates come from converging trackers read in late October 2026; the rendered pricing page lists seats but not the AI rates, so confirm them before signing. We use the resolution count, which three independent trackers agree on.

For a two-agent team at 500 conversations and 60% resolved: 300 resolutions, 10 included, 290 Γ— $1.50 = $435, plus $110 in seats. The AI line alone costs more than Fin’s entire bill at the same volume. Zendesk earns its price only for a team already running it at scale β€” especially if support data feeds an AI CRM setup. For a two-person shop starting from scratch, it is the hardest bill to defend.

Freshdesk Freddy

Freddy is the trap that looks like a bargain. The unit price, $0.49 per session, is half of Fin’s and a third of Zendesk’s. Seats are cheap too: Growth $19, Pro $55 and Enterprise $89 per agent a month on annual billing, confirmed on Freshdesk’s pricing page on 7 November 2026, with 500 free sessions once per account. Copilot is $29 per agent a month on Pro and Enterprise only.

But a session is not a resolution. At 500 conversations a month, Freddy bills 500 sessions β€” $245 β€” whether it resolves 150 of them or 450. Divide $0.49 by the resolution rate for the real cost per solved conversation: $1.63 at 30%, $0.98 at 50%, $0.70 at 70%. At 30% Freddy is the most expensive tool here per solved problem; at 70% the cheapest. The billing unit moves the answer, not the brand.

Freshworks raised sessions from $100 per 1,000 to $49 per 100 on 13 November 2025 β€” five times more per session β€” and raised plan prices in January 2026. Packs expire with the billing cycle, so unused sessions lapse each month. Buy monthly and in small packs until the resolution rate is proven.

Tidio Lyro

Tidio is the only tool here that prices by conversations rather than seats: Free, Starter at $29 a month for 100 billable conversations, Growth from $59 for 250, with 10 seats included even on the free plan. Lyro is a separate meter: 50 conversations free once, then paid quotas from $39 a month for 50 ($0.78 each) down to $0.70 each from the 200 tier. Those figures come from converging pricing trackers that read Tidio’s pricing page in September and October 2026.

Tidio’s product page says Lyro starts “from $0.50 per conversation”. That belongs to Lyro Connect, sold only with Plus and Premium on a demo call β€” not the self-serve quotas a small business buys, where the real range is $0.70 to $0.78. Treat $0.50 as a quote-only headline. Plus and Premium do carry a guaranteed 50% resolution rate or your money back, the only guarantee among these four.

Per resolved conversation at 60%, Lyro costs $0.70 Γ· 0.60 = $1.17 β€” dearer than Fin’s $0.99 and Help Scout’s $0.75, cheaper than Zendesk’s $1.50. Its natural home is a small store already on Tidio for live chat. Its weakness is the plan underneath: Starter covers only 100 conversations, so a 500-conversation store pays a higher tier on top of Lyro. If phone is your main channel, compare AI phone answering services first β€” the billing unit there is different again.

Help Scout

Help Scout’s AI Answers charges $0.75 per resolution, the lowest per-resolution rate here, on top of Standard at $25 per user a month on annual billing. New accounts get three months of unlimited AI resolutions free, and a spending cap is available β€” the only cap in this group. Confirm the $0.75 rate on Help Scout’s own page before buying.

At 500 conversations and 60% resolved, its AI line is 300 Γ— $0.75 = $225 with two seats at $50 β€” the cheapest combined bill in our comparison. The limit is scope: a shared inbox with an AI add-on, not a full agent platform like Fin or Zendesk. Appointment-heavy businesses should also weigh AI scheduling tools, which attack the no-show cost support agents never touch.

What AI customer support costs at real volumes

The table below is our calculation from the list prices above: two agents, a 60% AI resolution rate, and $8 per human-handled ticket as the example figure. Benchmarks put a human-handled email at roughly $8–15 and chat at $10–16 per contact (Lorikeet 2026, via a secondary summary), so $8 is the optimistic end. Seats are annual billing; Lyro’s plan fee is the $29 Starter floor and rises with volume.

Tool, 2 agents, 60% resolved500/mo1,000/mo3,000/mo
Intercom Fin$1,935$3,832$11,420
Zendesk AI agents$2,145$4,195$12,395
Freshdesk Freddy$1,883$3,728$11,108
Tidio Lyro$1,979$3,929$11,729
Help Scout AI Answers$1,875$3,700$11,000
All human, no AI$4,000$8,000$24,000

Three things stand out. At 60%, the five tools sit within about $270 of each other at 500 conversations β€” the choice is about fit, not price. The human remainder dominates every total: 200 unhandled conversations at $8 cost $1,600, more than any AI line. And the ranking flips when the rate drops: at 30%, Freddy’s bill barely moves while Fin’s AI line halves.

Work out your own bill

AI support bill calculator

Enter your numbers and press Calculate.

How the calculator works (our calculation): resolved conversations are your monthly conversations times the AI resolution rate. Fin, Zendesk and Help Scout charge only on resolved conversations; Freddy and Lyro charge on every conversation the AI touches. Seats use annual-billing list prices read on 7 November 2026. The 500 free Freddy sessions and 50 free Lyro conversations are one-time allowances, left out of this steady-state figure. The $8 human cost is an example β€” replace it with your real cost per ticket.

Who should not buy

Per-resolution pricing is a bargain at low volume, a coin flip in the middle, and an expensive habit at high volume β€” unless the billing unit matches your traffic. Three kinds of business should not buy it. First, a shop with spiky traffic: a sale or an outage can triple the AI bill in a month, and only Help Scout offers a spending cap. Second, a business whose questions are mostly complex or emotional β€” refunds, complaints, anything needing a person β€” because on Freddy or Lyro you still pay for the attempt. Third, a team with no knowledge base: the AI answers from your help articles, and if those are thin, the resolution rate will be low and the bill high for little deflection.

For those three, the honest alternatives are a flat plan, a cheaper seat-based tool, or no AI agent until the help centre is fixed. If you do buy, trial it for a month on real traffic and measure the resolution rate before signing anything annual. Building a chatbot with no code is a cheaper way to learn what customers actually ask before you pay per answer β€” and AI review management matters because one bad automated answer can become a one-star review the same day.

Where the sources disagree

Four conflicts are worth stating plainly. Intercom’s resolution rate is 76% on its comparison page and 67% in other trackers; both are vendor figures, and we used 60%. Intercom’s Essential seat is $19 on the live page, struck down from $29, while October trackers still list $29 β€” the $19 may be a promotion. Zendesk’s allowance is 5 resolutions per agent by three trackers and a dollar allowance by another; we used the resolution count. Tidio’s Lyro is advertised “from $0.50 per conversation” but self-serve quotas run $0.70 to $0.78.

Tidio’s and Help Scout’s prices were not re-read on their own pages; they come from converging trackers that read them in September and October 2026. Zendesk’s $1.50 and $2.00 rates likewise come from trackers, since the rendered page lists seats but not AI rates. Gorgias, at roughly $0.90 to $1.00 per interaction, was left out because its pricing is quote-led. No independent benchmark exists for any vendor’s resolution rate.

The short version

The billing unit is the decision. Fin charges only for success, the safest first buy for a small business with steady volume. Freddy’s $0.49 looks cheapest until you divide it by your resolution rate. Zendesk is the dearest per resolution on the dearest seats, so it only earns its price if you already live in Zendesk. Lyro fits a store already on Tidio; Help Scout is the cheapest combined bill for email and chat. Whatever you pick, measure your own resolution rate for a month before signing anything annual.

Frequently asked questions

How much does AI customer support cost per month?

For a small team with two agents and 500 conversations a month, the combined bill runs roughly $1,875 to $2,145 across the five tools here, including seats and the human-handled remainder at $8 a ticket. The AI line alone is $225 to $435.

What is per-resolution pricing?

You pay each time the AI settles a customer’s question without a human. Fin charges $0.99 per outcome, Zendesk $1.50 to $2.00 per resolution, Help Scout $0.75. Every vendor defines “resolved” differently β€” Intercom counts a customer’s silence after its answer, Zendesk counts only verified resolutions, and Freshdesk and Tidio charge per session or conversation whether the issue is resolved or not.

Is Intercom Fin worth it for a small business?

Yes, with steady volume above roughly 100 conversations a month and a decent help centre to answer from. The $0.99-per-outcome model means you pay only for success, and the 50-outcome minimum keeps the floor near $49.50. It is a poor fit for a very quiet inbox, where the minimum doubles the effective price, or a team with no help articles.

Does Freshdesk Freddy charge when it fails to resolve a ticket?

Yes. Freddy bills $0.49 per session β€” a time window of 72 hours for email, 24 hours for chat β€” not a resolution. If the AI talks to a customer for an hour and hands over to a human, that session is still billed. At a 30% resolution rate the real cost per solved conversation is about $1.63, the most expensive here for a team whose AI rarely finishes the job.

What is the cheapest AI customer support tool?

On unit price, Freddy at $0.49 per session. On cost per resolved conversation, Help Scout at $0.75, or Freddy if your rate is above roughly 65%. On the combined bill for two agents at 500 conversations, Help Scout is cheapest at about $1,875 in our calculation. Your resolution rate decides which of those is true for you.

Do I still need human agents with an AI support agent?

Yes. Even at 60%, 40% of conversations still reach a human β€” the hardest ones, refunds, complaints and edge cases. In our 500-conversation example the human remainder costs $1,600 a month at $8 a ticket, more than any AI line. The AI removes the repetitive middle; it does not remove the team.

Shurah is the founder of AI Tools Daily, tracking pricing, licensing and policy changes across AI tools so readers can make decisions without wading through marketing claims themselves.