Head to head · Updated June 10, 2026
Fin vs Sierra
Fin and Sierra are leading AI customer-support agents aimed at different buyers. Fin, from Intercom, is priced per resolution at $0.99 and works on non-Intercom helpdesks, making it accessible to startups and mid-market teams. Sierra builds branded enterprise agents for chat and voice on custom outcome-based contracts. Choose Fin for fast outcome-priced support, Sierra for enterprise scale.
Verdict: Fin for outcome-priced mid-market support; Sierra for branded enterprise scale.
Fin vs Sierra at a glance
| Fin | Sierra | |
|---|---|---|
| Starting price | $0.99/resolution | Custom enterprise |
| Free tier | No | No |
| Open source | No | No |
| Pricing model | Pay per resolved conversation | Outcome-based enterprise contracts |
| Pricing | $0.99 per resolved conversation | Custom outcome-based enterprise contracts |
| Channels | Chat across Intercom and other helpdesks | Chat and voice, deeply branded |
| Setup | Fast — builds from existing help content | Enterprise implementation; longer procurement |
| Best for | Startups through mid-market SaaS | High-volume consumer enterprises |
| Watch out | Cost scales with ticket volume | Overkill below large ticket volumes |
When to choose Fin
Choose Fin if you want AI support live quickly with pricing tied to outcomes. At $0.99 per resolved conversation it aligns cost to value, builds from your existing help content, and runs on Zendesk and other helpdesks — not just Intercom. It suits startups through mid-market SaaS teams.
Full Fin review →When to choose Sierra
Choose Sierra if you are a large consumer brand that needs branded chat and voice agents taking real actions across your systems. Sierra offers sophisticated brand-voice and guardrail controls on outcome-based enterprise contracts. Expect a longer procurement cycle; it is built for high-volume B2C support, not small teams.
Full Sierra review →Frequently asked questions
Is Fin or Sierra cheaper?
Fin has transparent, accessible pricing at $0.99 per resolved conversation, so cost scales directly with ticket volume and you only pay for resolutions. Sierra uses custom outcome-based enterprise contracts with no public price. Fin is easier to budget for startups and mid-market; Sierra targets large enterprises at negotiated rates.
Does Fin work outside Intercom?
Yes. Although Fin is made by Intercom, it works on non-Intercom helpdesks including Zendesk, so you can add AI resolutions without switching your support platform. This makes Fin accessible to teams already invested in another helpdesk who want outcome-priced AI support.
Does Sierra support voice as well as chat?
Yes. Sierra is built for both chat and voice, with strong voice support and deep systems integrations so agents can take real account actions. Combined with brand-voice and guardrail controls, this makes Sierra well-suited to high-volume consumer enterprises handling support across multiple channels.
Which is better for enterprise support, Fin or Sierra?
Sierra is purpose-built for enterprise, offering branded chat and voice agents, sophisticated guardrails, and deep integrations under outcome-based contracts. Fin scales into mid-market and larger teams via per-resolution pricing but is lighter to deploy. For large B2C brands needing voice and brand control, Sierra is the stronger fit.
See the full ranking: Best AI Customer Support Agents in 2026.