Intercom vs Zendesk

The oldest comparison in customer support, and the entry seat prices are now close enough that they are not what decides it. The second meter is. Both of them charge again when the AI does the work, and they do it differently.

Prices read 18 September 2026. Zendesk’s included resolutions re-read 21 September 2026.

Side by side

Free plan

Intercom
None
Zendesk
None
Deacon
50 answers a month on one seat, and no card is asked for

The trial

Intercom
Fourteen days, no card, with every feature, Fin and the add-ons included
Zendesk
Fourteen days, no card, on the Suite Professional plan, with Copilot switched on
Deacon
There is no trial, because there is a free plan

Cheapest paid plan

Intercom
Essential, $19 or $29 a seat a month on annual billing. The page runs a live price experiment and serves one figure or the other; the $39 in its structured data is the monthly rate
Zendesk
Support Team, $19 an agent a month paid yearly. The monthly rate of $25 is in the page’s own data rather than its printed text
Deacon
Starter, $50 a month, or $40 a month billed yearly, for 1,000 answers

How many meters

Intercom
Two. Seats, then usage — Fin outcomes, WhatsApp, SMS, email campaigns and phone
Zendesk
Three. Agent seats, automated resolutions, and add-ons priced separately again — Copilot is $50 an agent a month paid yearly, on Professional and above
Deacon
One. Answers used

What the AI unit is

Intercom
An outcome, at $0.99, or $1.99 for one settled over the phone. Counted when a customer confirms the issue is resolved, or does not ask for more help after Fin replies, or Fin completes a workflow
Zendesk
An automated resolution: a customer request the AI agent resolved without escalating to a person
Deacon
An answer. There is no second unit

What the AI costs beyond the plan

Intercom
Everything. There is no included allowance; outcomes bill as you go
Zendesk
Each plan includes a count of automated resolutions — five an agent a month on Support Team and Suite Team, ten on Suite Growth and Suite Professional, fifteen on Suite Enterprise, and at most 10,000 a year. Past it, $2.00 a resolution pay as you go, or less on a commitment Zendesk prices per market
Deacon
Nothing. The plan is the price

When it does not answer

Intercom
You pay nothing. Intercom says so plainly, and also refunds the outcome if the conversation is reopened
Zendesk
Nothing is billed, because a resolution is by definition one that did not escalate
Deacon
It says so, offers to take an email address, and marks the conversation unanswered so you can write the answer once

What happens at the limit

Intercom
You set a hard limit and Fin switches off at it. A limit below your contracted minimum still bills the minimum
Zendesk
You choose in advance. Allow overage is the default and the bot keeps answering on the pay-as-you-go rate; the alternative pauses the AI and sends the work to people
Deacon
There is no overage to allow or refuse. The widget says it cannot look into that one and asks for an email address

Minimum spend

Intercom
One paid seat, and on a third-party help desk a monthly commitment Intercom illustrates as 50 outcomes
Zendesk
One agent seat. The included resolutions are capped at 10,000 a year across the account
Deacon
The plan price

Getting it on your site

Intercom
A JavaScript snippet before the closing body tag on every page, once the Messenger is enabled. Intercom’s help centre says you need a trial or a subscription first
Zendesk
A snippet before the closing body tag on every page. One click, but only on a help centre Zendesk hosts
Deacon
One script tag before the closing body tag

If you are a startup

Intercom
Early Stage: 93% off in year one, the help desk from $33 a month with 300 Fin outcomes, for companies under $10 million raised with fewer than 15 employees and no existing account
Zendesk
Zendesk for Startups: six months free as a baseline and up to two years for qualified applicants, for up to 50 agents, no card up front. Under 250 employees, no later than series B, company under ten years old
Deacon
Nothing published. The free plan is the offer, and it is the same one everybody gets

Channels

Intercom
Voice, email, Messenger, WhatsApp, Instagram, Facebook Messenger, SMS, Slack, Discord and an agent API
Zendesk
Email, a contact form, the web widget, mobile SDKs, social and business channels, voice with telephony and IVR, SMS as an add-on, a help centre and community forums
Deacon
One. The widget on your own site

How each one meters the AI

Intercom bills the result

There is no included allowance of Fin outcomes on any tier. Every outcome is $0.99 and it bills as you go. What softens that is the definition: at most one outcome a conversation however many questions Fin answered, nothing at all when Fin cannot answer or the customer asks for a person, and the outcome refunded if the conversation is later reopened. You cap it by setting a hard limit, though a limit below your contracted minimum still bills the minimum.

Zendesk bills the overflow

Every plan carries an allowance, and Zendesk counts it in resolutions. Its comparison table heads the row "Included automated resolutions (up to 10k per year)" and gives five an agent a month on Support Team and Suite Team, ten on Suite Growth and Suite Professional, and fifteen on Suite Enterprise. Against its own pay-as-you-go rate of $2.00 a resolution, five a month per agent is about $10 of answering included on the cheapest tiers. Past the allowance you choose in advance what happens: allow overage is the default, so the AI keeps answering and you are billed for it, and the other setting pauses the AI and routes the work to people.

Both are honest about it and both publish the rules. The thing to sit with is that under either scheme, the better your AI gets at answering, the more you pay. That is a fair trade when it is replacing an agent’s hour. It is a strange trade when there was never going to be an agent.

When each one is the better buy

Zendesk is the one to buy if support is a function with a rota, a queue and a service level. The channel list is the widest here — email, contact form, widget, mobile SDKs, social, telephony with IVR and callback, SMS, a help centre and community forums. The overage behaviour is also a real setting rather than a footnote: you decide in advance whether the bot keeps going or the work goes to people, which is more control than Intercom offers. Do not buy it for the included allowance, though. The cheapest tiers include five automated resolutions a month per agent, and the whole account stops at 10,000 a year.

Intercom is the one to buy if you expect the AI to carry most of the load. Its per-unit price is lower, it does not charge when Fin fails, it caps you at one outcome a conversation, and it refunds the outcome if the customer comes back. Early Stage puts all of that at 93% off for a first year if you have raised under $10 million and have fewer than fifteen people, which is the best offer on this page by a distance.

There is a prior question worth asking, which is whether you need a help desk at all. If nobody is going to be working out of an inbox, both of these are being bought for a team that does not exist, and both will bill you twice for the AI doing the job instead. Deacon has no seats and no second meter: one plan price, a widget on your own site, and the questions it could not answer handed back to you.

The things that actually differ

Zendesk’s Support Team is $19 an agent a month paid yearly, and Intercom’s Essential is $19 or $29 on annual billing depending which side of a live price experiment you land on. What reliably separates them is the AI. Zendesk includes five automated resolutions an agent a month on its cheapest tiers, then charges $2.00 for each one after that, or less on a commitment. Intercom includes nothing and charges $0.99 an outcome from the first one, but bills at most once a conversation and nothing when Fin fails. Five a month is not much either way, so the question is which per-unit price you prefer.

Not as a plan you can sign up for, but both run a programme worth knowing about if you qualify. Zendesk for Startups gives six months free as a baseline and up to two years for qualified applicants, on up to 50 agents, with no card up front; you need under 250 employees, to be no later than series B, and to be under ten years old. Intercom’s Early Stage is 93% off the first year with the help desk from $33 a month. Outside those, both are a fourteen-day cardless trial and then a seat.

Less than the names suggest, and both are defined by the vendor rather than by you. Intercom counts an outcome when the customer confirms the issue is resolved, or does not ask for more help after Fin responds, or when Fin completes a workflow including a handoff. Zendesk counts an automated resolution as a customer request the AI resolved without escalating to a person. Both charge for success, which means both get more expensive as the AI gets better.

Harder than the install suggests. Both go on a site as a snippet before the closing body tag, but the thing you would be moving is the help centre, the macros, the routing rules and the ticket history, not the widget. Both ingest external knowledge sources, which makes the content half easier than it used to be. Budget for the workflow half.

Where these figures came from

Every figure above was read on 18 September 2026, from these pages.

Try Deacon for free

One meter, one plan price, and no help desk underneath. Deacon answers your visitors from your own pages and tells you what it could not answer.

The Deacon and Zendesk comparison goes at the three-meter question directly, and Intercom alternatives for startups works several of these bills out. Ours are on the pricing page.

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