Customer service software with AI costs about $0 to $132 per agent a month for the seat on annual billing: Help Scout is free for up to five users, Freshdesk starts at $19 and Zendesk Suite Team is $55. AI agents then add $0.50 to $0.99 per resolved conversation, and drafting copilots $29 to $50 per agent.
Per agent stops being the right unit once an AI agent is answering customers. Seat prices are fixed, but AI charges grow with your conversation volume and belong to no particular agent, so a four-person team handling 1,200 conversations a month can pay more for AI than for seats. Work out the cost per conversation alongside the cost per agent, and read how each vendor defines the thing it bills for.
Seat prices and AI charges, side by side
From each vendor's own pricing page in September 2026, per agent a month on annual billing unless noted. Monthly billing costs more at all of them.
| Help desk | Seat per agent | AI agent charge | AI help for human agents |
|---|---|---|---|
| Help Scout | Free for 5 users; Standard $25, Plus $45, Pro $75 (10-user minimum) as listed, about 16% off annually | AI Answers $0.75 per resolution on paid plans only, 3-month free trial | AI inbox assistant on Standard; unlimited AI drafts from Plus |
| Freshdesk | Growth $19, Pro $55, Enterprise $89 | Freddy AI Agent sessions: 500 free once for new customers, then $49 per 100 | Freddy Copilot $29 per agent, Pro and Enterprise only |
| Zendesk | Support Team $19; Suite Team $55; Suite Professional $115 | AI agents on every plan; only verified resolutions beyond the plan's allowance are billed, at a rate from sales | Copilot add-on $50 per agent |
| Intercom | Essential $29, Advanced $85, Expert $132; minimum 1 full seat | Fin $0.99 per outcome | Copilot $29 per agent ($35 monthly); 10 free conversations per agent a month |
| HubSpot Service Hub | Professional $90 ($100 monthly), plus a required $1,500 onboarding fee | Customer Agent: 50 HubSpot Credits (about $0.50) per resolved conversation; 3,000 credits a month included | Breeze features within the plan |
Two cautions on reading that table. Zendesk doesn't publish its per-resolution rate on the pricing page, so ask sales for it in writing before you compare. And Help Scout's page doesn't make it obvious whether the displayed figures are the monthly or annual price, so confirm which one a quote assumes. For the wider feature comparison, the best AI customer support software for small teams goes tool by tool; this tutorial sticks to the per-agent arithmetic.
The per-agent formula once an AI agent is answering
Seat prices are per agent by design. Everything AI-related has to be spread across the team to get a comparable figure:
Cost per agent per month =
seat price
+ copilot price (if every agent has one)
+ (AI resolutions or sessions x unit price) / number of agents
+ (one-off fees / 12) / number of agents (for year one)
Cost per conversation = total monthly cost / conversations handledKeep both figures. Cost per agent tells you what adding a person to the team adds to the bill. Cost per conversation tells you what your support actually costs as volume grows, and it's the one that moves when the AI starts taking work.
Estimating how much the AI will resolve, before you buy
Every figure in the sums below depends on one number: the share of conversations an AI agent can close on its own. Vendors will quote their best customers. Estimate yours from last month's tickets instead. Export a random 100 (subject line and first message are enough), remove names and contact details, and give them to an AI assistant on a business plan with a prompt like this:
Below are 100 customer messages to a packaging supplier. Sort each
into one of three groups:
A = answerable from our published help pages alone (delivery times,
file formats, minimum orders, returns policy)
B = needs a look-up in our order system (status, tracking, invoice)
C = needs a person (damage claims, complaints, custom quotes,
anything involving money or blame)
Return a count for each group and list the message numbers in C.
If a message could fit two groups, put it in the later one.
[100 messages]The illustrative answer came back as A: 38, B: 41, C: 21. The count for A is the realistic starting point for resolutions, and it only holds if the help pages actually answer those questions. Group B is the trap: an AI agent that can't see the order system will reply to those customers with general information, and some will count as resolved when they go quiet. Two fixes before trusting the numbers: read the 21 messages the assistant put in C, and ten from A, to check its sorting; and treat B as unresolvable until the AI is connected to orders. For the supplier, that turned a vendor's hopeful 60% into a planning figure of 35%.
A four-agent desk at a packaging supplier, costed five ways
Take an illustrative packaging supplier with four support agents handling 1,200 conversations a month by email and chat: order status, artwork files, delivery changes, damaged-box claims. The assumptions, which you should replace with your own ticket data:
- The AI agent takes part in 60% of conversations (720) and fully resolves 35% of all conversations (420).
- On Intercom, billable outcomes come to 460, because its definition also counts customers who stop replying and completed workflows that end in a handoff.
- All four agents get the drafting copilot where it's sold separately.
| Set-up | Seats | AI agent | Copilot | Monthly total | Per agent | Per conversation |
|---|---|---|---|---|---|---|
| Help Scout Plus | 4 x $45 = $180 | 420 x $0.75 = $315 | Included | $495 | $123.75 | $0.41 |
| Freshdesk Growth (no Copilot available) | 4 x $19 = $76 | 720 sessions = 8 packs x $49 = $392 | Not available | $468 | $117.00 | $0.39 |
| Freshdesk Pro | 4 x $55 = $220 | $392 | 4 x $29 = $116 | $728 | $182.00 | $0.61 |
| Intercom Advanced | 4 x $85 = $340 | 460 x $0.99 = $455.40 | 4 x $29 = $116 | $911.40 | $227.85 | $0.76 |
| HubSpot Service Hub Pro, year one | 4 x $90 = $360, plus $125 onboarding spread | 420 x 50 credits = 21,000; less 3,000 included = 18,000 x $0.01 = $180 | Within plan | $665 | $166.25 | $0.55 |
Zendesk Suite Team would be 4 x $55 for seats plus 4 x $50 for Copilot, $420 before any verified resolutions beyond the plan allowance, so it can't be placed in the ranking until sales gives you the rate.
Three things stand out. First, the AI charge is the largest single line in most rows, so the seat price alone is a poor guide. Second, Freshdesk bills per session, meaning every conversation the AI takes part in, resolved or not; at 720 sessions for 420 resolutions, its effective price is about $0.93 per resolution, close to Intercom's $0.99 despite the lower-looking pack price. Third, the free 500 Freddy sessions are a one-time allowance for new customers, so month one looks far cheaper than month two. Budget from month two.
What each vendor counts as a billable AI conversation
Resolution pricing is only as fair as the definition behind it, and the definitions differ:
- Intercom Fin: an outcome is counted when a customer confirms the issue is resolved, or doesn't ask for more help after Fin responds, or Fin completes a workflow, including ones that hand over to a person. You're charged once per conversation.
- Zendesk: since 18 May 2026, when a conversation ends (after 2 hours without a reply on messaging by default, adjustable up to 72; 72 hours after the first message on email) a language model checks the outcome and sorts it into one of three tiers. Assisted escalations, where the AI helped and a person finished, and contained resolutions, where the check didn't confirm a resolution, are free. Only verified resolutions are billed, and the rate beyond your allowance isn't published.
- Freshdesk: a session is every AI conversation within a 24-hour window on chat, or 72 hours from the first email on email, whether or not it resolves anything.
- Help Scout: AI Answers is billed at $0.75 per resolution, and a conversation isn't billed if the customer escalates to a person, searches the help docs, asks again or says they need more help. It's an add-on for paid plans; the free plan doesn't include it.
- HubSpot: the Customer Agent counts a resolution when there's no hand-off to a person within 72 hours, and each one uses 50 credits.
Silence isn't satisfaction. Under a definition that counts customers who stop replying, someone who gives up on the chat and phones instead can still be billed as an outcome. Zendesk's verification step is meant to filter those out; whichever vendor you use, sample the billed conversations yourself. Outcome-based AI pricing goes deeper into how these models behave, and it's worth reading before signing anything priced per resolution.
Resolved on paper, on the phone in reality
An illustrative contract-testing laboratory switched on an AI agent to answer clients' questions about sample status. The AI replied to most of them with the standard turnaround times from the help centre. Many clients didn't reply; they rang the lab instead, because what they wanted was the status of their own batch, which the AI couldn't see.
It showed up as two numbers moving the wrong way at once: the monthly bill for AI resolutions rose, and phone calls about sample status didn't fall. A sample of 50 billed conversations showed 19 where the client had simply gone quiet and then called. The fix had two parts: connect the AI to the order system so it could answer the real question, and until then, route "where is my sample" questions straight to a person so they weren't billed as resolved. A monthly sample like that is cheap insurance; a weekly sampling routine for AI support replies shows how to run one in under an hour.
When per-agent pricing is cheaper, and when it flips
Resolution fees scale with volume; seats don't. That creates a crossover worth calculating before you sign. Two quick sums for the packaging supplier:
Intercom Fin at 1,000 outcomes a month:
1,000 x $0.99 = $990 -> more than 11 Advanced seats at $85
AI agent vs another person, at $0.99 per outcome:
If an extra agent costs you $3,500 a month in wages and overheads
(use your own figure), $3,500 / $0.99 = about 3,535 outcomes
a month before the AI costs as much as the person.At the supplier's volume, the AI is far cheaper than a fifth agent. But the person handles damaged-box claims, awkward customers and artwork problems that the AI can't, so the real comparison is the AI plus the current four against five people without AI. Hiring a customer service person alongside AI covers that decision, and AI or outsourced customer service covers a third option.
Seasonal staff: day passes and light seats
A home-care provider's office brings in two temporary coordinators each winter to handle extra enquiries. Paying for full seats all year is waste, and there are cheaper routes:
- Freshdesk day passes: $2 a day on Growth, $7 on Pro, $12 on Enterprise. On Growth, a seat at $19 a month beats day passes once someone works more than nine days in the month; on Pro, a $55 seat beats $7 passes after about eight days.
- Light or Lite seats: Intercom includes 20 free Lite seats on Advanced and 50 on Expert, and Help Scout's Pro plan allows up to 50 light users. They suit people who read and comment, not people who reply to customers.
- Monthly billing for the extra seats: where annual plans lock the seat count, keep temporary seats on a monthly arrangement if the vendor allows mixing.
For the home-care office, two temporary coordinators working 15 days a month for three months on Freshdesk Growth cost 2 x 3 x $19 = $114 as monthly seats, against 2 x 45 x $2 = $180 in day passes. For someone covering three days a month, the day pass wins.
Costs that don't appear in the headline seat price
- Onboarding fees. HubSpot Service Hub Professional requires a one-off $1,500; over a four-agent team's first year, that's about $31 per agent a month.
- Channel charges. Intercom charges separately for WhatsApp conversations, SMS messages, email campaigns and phone use; inbound email and live chat are included.
- Fin with another help desk. Intercom sells Fin on top of other help desks at $0.99 per outcome with a minimum monthly commitment, giving the example of 50 outcomes.
- Copilot on every seat. Zendesk sells its add-ons for all agents. Elsewhere, if only two of five agents would use a drafting copilot, ask whether you can license two; otherwise the per-agent figure includes three unused licences.
- Integration work. An AI agent that can't see your order or booking system answers the easy questions only. Connecting it is often a separate project, with its own cost.
- The one-time free allowance. Freshdesk's 500 free sessions, Help Scout's three-month AI Answers trial and Intercom's 14-day trial all make month one unrepresentative.
Putting a ceiling on the AI line of the bill
Seat costs are predictable; AI charges aren't, especially in a month with a delivery problem that doubles your conversations. Set a ceiling before go-live:
- Intercom says you can track Fin usage, set alerts and use hard limits to control spend. Set the limit at about 1.5 times your expected monthly outcomes, so a busy month still gets answered but a runaway one doesn't.
- Freshdesk sells sessions in packs of 100, which works as a natural cap: when the packs run out, you decide whether to buy more.
- Help Scout has a monthly cap setting for AI Answers.
- HubSpot credits aren't pooled across hubs, so the Customer Agent draws on the Service Hub's own allowance, alongside any other credit-using features there. Check the credit usage report weekly for the first month.
- Everywhere: decide in advance what happens at the cap. The safe default is that conversations go to the human queue, not that customers get no answer.
For the packaging supplier, a 690-outcome hard limit on Intercom (1.5 x 460) caps the Fin line at about $683 in a bad month, and the agents know that if the AI switches off before month end, the queue will be longer for a few days.
A quote request that gets you the real price
Most of the unknowns above are one email away. A filled-in request the supplier sent to each shortlisted vendor:
Subject: Pricing for 4 agents and about 1,200 conversations a month
Hello, we're comparing help desks for a four-person team handling about 1,200 email and chat conversations a month. Please confirm in writing: the seat price on monthly and annual billing; the price per AI resolution or session beyond anything included, and exactly how a billable resolution is defined; any allowance included in the plan and whether it's monthly or one-off; whether the drafting assistant can be licensed for some agents only; any onboarding or setup fees; and whether we can set a hard monthly cap on AI charges. Thank you, [name], Customer Service Manager.
Turning any quote into two comparable figures
Ask every vendor for the same inputs, then fill in one line each. A filled-in comparison for the packaging supplier's shortlist:
Vendor Seats Copilot AI unit Units/mo One-off Month total Per agent Per conv.
Help Scout Plus $180 incl. $0.75 res. 420 $0 $495 $123.75 $0.41
Freshdesk Pro $220 $116 $0.49 sess. 720 $0 $728 $182.00 $0.61
Intercom Adv. $340 $116 $0.99 out. 460 $0 $911.40 $227.85 $0.76
Zendesk S. Team $220 $200 ask sales ? $0 $420 + ? ? ?The empty cells are the questions to send. A vendor that won't give you a per-resolution rate or an honest estimate of billable units for your volume is asking you to sign without knowing the price. Get both figures in writing, run a two-week trial on real conversations, and compare the billed units against what actually happened in your inbox before committing to annual seats. Freshdesk vs Zendesk for a small support team shows that trial in detail for two of the tools above.
Per-agent pricing: common questions
Do I have to buy an AI copilot for every agent?
Copilots are priced per agent, and the rules differ: Zendesk sells its add-ons for all agents, so there it is all or nothing, while elsewhere it's worth asking whether you can license only some agents. Intercom gives every agent 10 free Copilot conversations a month, which is enough to test it. Freshdesk's Copilot is only available on its Pro and Enterprise plans, so on Growth the question doesn't arise.
Are the prices per agent or per user?
They're usually per full seat: anyone who replies to customers. People who only read, comment or report can often have cheaper or free seats: Intercom includes 20 free Lite seats on Advanced and 50 on Expert, and Help Scout's Pro plan allows up to 50 light users. Check what a light seat can't do before giving one to someone who sometimes answers customers.
Is monthly or annual billing better for a help desk?
Annual is cheaper per seat, often by 15-20%, but it locks your seat count for the year at many vendors. Start monthly while you test the AI features and learn your real volumes, then move to annual once the team size is stable. Check whether seats can be reduced at renewal only, or at any time.
Further reads
- Tidio vs Intercom: Which AI Chat Tool Suits a Small Business? — A lighter chat tool compared with Intercom for small shops.
- AI Customer Service for Small Businesses: What to Automate First — Which customer questions to automate first.
- How Much Does a Website AI Chatbot Cost, and Will It Pay Off? — When a website chatbot pays for itself.
- What to Ask an AI Chatbot Vendor Before You Sign Up — What to ask before an AI answers your customers.
- AI Ticket Triage: Tag, Route, and Prioritise Support Requests — Cheaper AI wins inside the help desk you already have.
- Per-Seat vs Usage-Based AI Pricing: Which Costs Less for You? — The general maths of seats versus usage fees.
- AI Subscription Prices Compared for Small Businesses (2026) — Every major AI subscription a small business is likely to pay for, priced side by side, with three example stacks and the costs pricing pages leave out.
- Customer Service QA Software With AI: What to Compare — The criteria that matter when choosing AI quality assurance software for a support team, five products compared, and a worked choice for six agents.
- How to Read AI Software Pricing: Seats, Credits, and Usage Fees — The six pricing units AI software uses, the fine print that changes the total, and a sports shop turning three pricing pages into one monthly figure.
- Is HubSpot Worth Paying For Just for Its AI Features? — The seat jump, the onboarding fee and the credit meter, worked through for a small florist, so you can see when HubSpot's AI agents pay back.
- AI Tools and AI Development: The Complete 2026 Guide — the AI hub, including every tutorial in the AI-for-business series.
Sources: pricing pages for Help Scout, Freshdesk (Freshworks), Zendesk, Intercom and HubSpot Service Hub; Freshdesk support article on managing Freddy AI add-ons; Intercom pricing FAQ on Fin outcomes. Checked September 2026.