Before committing to either Intercom Fin or HubSpot Breeze, here are the costs and catches that won't be obvious from their pricing pages.
Intercom Fin — what to watch for
- Unpredictable monthly bills — 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
HubSpot Breeze — what to watch for
- Costs rise as your AI resolution rate climbs — at $0.50/resolution, 5k resolutions/month works out to ~$2.5k just for AI
- Like other per-resolution models, you're billed even when the AI's answer didn't fully resolve the issue
- Requires an active HubSpot Service Hub subscription (~$90/month starter) — Breeze is never standalone
- Breeze AI capabilities are relatively new and less mature than Intercom Fin or Zendesk AI
The cost nobody talks about: what happens when the AI can't answer?
Intercom Fin uses per-resolution pricing while HubSpot Breeze uses per-resolution pricing. This means they handle the 'AI can't answer' scenario very differently.
Intercom Fin: Intercom Fin charges per resolution — 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.
HubSpot Breeze: HubSpot Breeze charges $0.50 per AI resolution, so you're only billed when Breeze handles a conversation without escalating to a human. As with other per-resolution models, HubSpot decides what counts as a resolution, and you can be charged even if the answer wasn't fully helpful — as long as the customer didn't escalate.
This is why comparing headline per-resolution vs per-resolution costs is misleading. The metric that matters isn't how much each billable event costs — 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).