Sierra vs Fin

Sierra and Intercom Fin are the two names each other's own listings on this site already call their "closest real rival" — but the rivalry runs through buying motion, not just capability. Sierra, co-founded by Bret Taylor and Clay Bavor in early 2024, sells a managed "agent OS" to large enterprises: there's no public pricing page, no self-serve signup and no free tier, and building an agent means an Agent Studio engagement gated behind a sales conversation. Intercom Fin is the opposite motion: a published $0.99-per-resolution price, a 14-day free trial with no credit card, and — Intercom claims — live on any major helpdesk in under an hour. Both resolve customer conversations end to end rather than just answering FAQs, and both increasingly reach beyond chat into voice, email and other channels, but who can actually buy each one today is the sharpest line between them.

The products diverge on reach and control as much as on price. Sierra spans chat, email, SMS, WhatsApp, voice and ChatGPT from a single agent definition, adds a visual Agent Studio plus Ghostwriter (which turns SOPs or plain-English descriptions into a production agent), and in July 2026 launched Horizon, a layer for agents that pursue a goal over days or weeks — originating a loan, securing a prior authorization — rather than resolving one conversation at a time; it also holds FedRAMP High certification (June 2026, with Knox Systems), opening federal workloads few competitors can touch. Fin's distinguishing trick is portability: it runs natively in Intercom or bolts onto Zendesk, Salesforce, HubSpot or Freshdesk, so a team keeps its existing ticketing system of record while Fin handles the front line, backed by a fully documented API and MCP support for deeper integration. Sierra reports $150M+ ARR by February 2026 and customers across more than 40% of the Fortune 50 (Rocket Mortgage, Gap, Uber, Vanguard and Santander among the logos live on sierra.ai today); Intercom reports Fin resolves an average 76% of conversations across 12,000+ customers, though independent analyses of its own published case studies often put real-world rates closer to 40-50%.

Pricing is where the two are furthest apart. Sierra is purely outcome-based and custom-negotiated — you pay a pre-negotiated rate only when an agent resolves an issue, and escalations to a human aren't charged at all — but the rate itself is never published, so there's no way to budget without going through a sales process. Fin, re-confirmed live on fin.ai/pricing on 2026-08-03, is $0.99 per resolution with a 50-resolution monthly minimum on any non-Intercom helpdesk, or the same $0.99 plus $29 per seat/month if you run it natively inside Intercom; a 14-day trial with unlimited outcomes needs no card. The one wrinkle worth knowing before trusting that math: Fin's meter counts "assumed" resolutions when a customer simply stops replying, which isn't the same as being helped, so real costs can run ahead of true resolution volume. And there's a live corporate-ownership factor on the Fin side that Sierra doesn't share: Salesforce signed a definitive agreement on 2026-06-15 to acquire Intercom/Fin for roughly $3.6 billion, expected to close around Salesforce's fiscal Q4 2027 — still pending as of this writing, with neither company having published what changes for Fin's pricing, API or non-Salesforce-helpdesk customers once it closes.