Before committing to either Intercom Fin or Zendesk AI, here are the costs and catches that won't be obvious from their pricing pages.
Intercom Fin โ what to watch for
- Unpredictable monthly bills โ as your AI resolution rate improves, costs go up proportionally
- You're charged $0.99 even if the AI's answer didn't actually solve the customer's problem, as long as they didn't escalate
- Reddit users report 120% billing increases after enabling Fin (e.g. $4k to $9k/month)
- Copilot is an additional $35/agent/month on top of resolution costs
Zendesk AI โ what to watch for
- Pricing is not transparently listed on Zendesk's site โ add-on costs require contacting sales
- The 'Automated Resolution' definition is decided by Zendesk, making costs hard to predict
- Zendesk's own help center article on Automated Resolutions has -17 downvotes from frustrated users
- Advanced AI Agent (~$50/agent/month) required for real conversational AI โ base AI Essentials just sends help center links
The cost nobody talks about: what happens when the AI can't answer?
Intercom Fin uses per-resolution pricing while Zendesk AI uses per-resolution + add-on pricing. This means they handle the 'AI can't answer' scenario very differently.
Intercom Fin: Intercom Fin charges per resolution โ if a customer asks a question and gets an AI response but doesn't escalate, you're billed $0.99 regardless of whether the answer was actually helpful. If the customer does escalate to a human, you're not charged for a resolution, but you are paying for the human agent's time.
Zendesk AI: Zendesk charges per Automated Resolution โ when the AI handles a conversation without it being transferred to a human. The exact criteria for what counts is determined by Zendesk, and their own documentation on this has been heavily downvoted by confused users.
This is why comparing headline per-resolution vs per-Automated Resolution costs is misleading. The metric that matters isn't how much each billable event costs โ it's what each platform counts as a billable event in the first place, and whether you're paying for outcomes (successful resolutions) or activity (any AI interaction).