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Fin vs Sierra
Fin is the one you can start this week: it publishes per-outcome pricing, has a free trial and works with the helpdesk you already have. Sierra is an enterprise build, priced by quote.
At a glance
| Fact | Fin | Sierra |
|---|---|---|
| Made by | Fin (formerly Intercom) | Sierra |
| What it is | Fin's AI customer agent for service and the whole customer journey (the company was formerly Intercom). | AI agents that give companies better customer experiences. |
| Price | Paid from $0.99/per outcome | Enterprise pricing |
| Runs on | Web, Slack, WhatsApp, API | WhatsApp, iMessage/SMS |
| Open source | No | No |
| Models | Not stated | Not stated |
| Last verified | October 14, 2026 | October 14, 2026 |
| Official site | fin.ai | sierra.ai |
Where they differ
- Price: Fin charges per outcome (a resolution, handoff or routing) and offers a free trial; Sierra quotes enterprise pricing.
- Setup: Fin works with your current helpdesk or with Intercom's; Sierra's agents are built in its Agent Studio.
- Channels: Fin covers voice, chat and email, plus Slack, WhatsApp and an API; Sierra lists WhatsApp and iMessage/SMS.
Which to pick
Choose Fin if you want published pricing, a free trial and an agent that plugs into the helpdesk you already run.
Choose Sierra if you're a large company that wants a custom-built agent across messaging channels and is fine with a sales process.
Keep looking
Facts from each maker's official pages, last verified October 14, 2026.