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Fin by Intercom vs Sierra AI (2026)

Comparing Fin by Intercom and Sierra AI? Both are AI Agents & Chatbots tools in the directory, which is why buyers put them on the same shortlist. Below is a side-by-side look at pricing and an estimated monthly bill, channels, compliance claims, and integrations, plus when each is the better fit, so you can pick on the facts rather than either vendor's own sales page.

At a glance

Conversations/mo

% handled by AI

Agent seats

Price it at my volume

Estimates assume 5,000 conversations a month, 60% handled by AI and 10 agent seats, at each vendor's published list price (the cost calculator's model); treat them as a floor, not a quote. Compliance rows are what vendors publicly claim, and “Not verified” means we have not confirmed that fact yet, not that the tool lacks it.

Choose Fin by Intercom or Sierra AI?

About Fin by Intercom

Fin is Intercom's AI agent, and it has quietly become the product the whole company rallies around. It runs on the same platform as Intercom's inbox, help center, and messenger, so it already knows your customers before it says a word. Point it at your help articles and past conversations and it starts answering questions instantly across chat, email, SMS, and WhatsApp, taking real actions through your integrations and escalating to a human with full context when a question genuinely needs one.

The thing that made Fin famous is how it is billed. Instead of charging per seat or per conversation, Intercom charges roughly a dollar for every question Fin actually resolves, so you only pay when the robot earns its keep. That pay-for-outcomes model was unusual when Fin launched and has since become the template half the industry copies.

Intercom was founded in 2011 by four friends from Dublin, and it spent a decade building the messaging tools Fin now sits on top of. Fin does not insist you live inside Intercom, either. Its platform version bolts the same agent onto other help desks like Zendesk and Salesforce, so teams can keep their existing ticketing setup and still hand the easy questions to AI. It ships with simulation testing, analytics, and tunable tone controls so you can rehearse answers on historical tickets before flipping the switch on real customers.

In 2026 the company renamed itself Fin after this agent, and Salesforce completed its acquisition of Fin, formerly Intercom, on September 10, 2026. Fin keeps selling on its own and on top of other help desks, but buyers on a competing CRM should ask how the roadmap changes under Salesforce.

For buyers, Fin is the safe, well-documented default: enormous scale, a public per-resolution price you can model on a spreadsheet, and a product that resolves millions of conversations every week for companies of every size. If you want an AI agent that is proven, measurable, quick to pilot, and easy to justify to a finance team that wants a number, Fin is usually the first name on the shortlist and rarely a regrettable one.

Read the full Fin by Intercom listing →  ·  See Fin by Intercom alternatives →

About Sierra AI

Sierra builds conversational AI agents for the enterprise, and it arrived with about as much star power as a startup can carry. It was founded in 2023 by Bret Taylor and Clay Bavor, and if those names ring a bell it is because Taylor co-created Google Maps, served as CTO of Facebook and co-CEO of Salesforce, and currently chairs the board of OpenAI, while Bavor spent eighteen years at Google leading its virtual and augmented reality work. Company lore says the whole thing was hatched over a grilled branzino lunch in Palo Alto.

The product lives up to the pedigree. From a single build, Sierra deploys a branded agent across chat, voice, email, SMS, and even ChatGPT, following your policies, adopting your brand's voice, and escalating gracefully when a conversation gets thorny. Its voice agents are a standout: they hold natural, low-latency conversations, read sentiment, and can even take a credit card or ACH payment over the phone in one uninterrupted call, with no clumsy handoff to a separate system.

Under the hood sits Agent OS, a platform for building, testing, and supervising agents, with tooling to run voice simulations and rehearse behavior before anything reaches a real customer. Pricing is outcome-based, tied to conversations or successful resolutions and wrapped in multi-year enterprise contracts, so Sierra is aimed at large brands rather than weekend experimenters. Reported customers include SoFi, Ramp, and Brex, and the company says its agents already serve a meaningful slice of the Fortune 50.

Sierra's fundraising has kept pace with its towering ambition, vaulting the company into the rarefied tier of the most valuable AI startups in barely two years. For enterprises that want polished, on-brand agents across every channel and are willing to invest the time and budget to do it properly, Sierra is a genuine marquee choice.

Read the full Sierra AI listing →  ·  See Sierra AI alternatives →

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