
What actually makes something an AI agent
I build AI agents for a living, so let me draw the line clearly, because the marketing has blurred it. A rule-based chatbot follows a decision tree: it matches your message to a pre-written intent and replies with a canned answer. Useful, but it can't do anything it wasn't scripted to do, and it dead-ends to "let me connect you to an agent" the moment you go off-path.
An AI agent runs a loop instead of a script. It perceives the request and its context, reasons about a plan, acts by calling tools (look up an order, process a refund, update a CRM record), and learns from the outcome. That agent loop is the whole difference. It's why an agent can resolve a multi-step request end to end while a chatbot can only answer the one question it recognised.

That definition matters because it sets the bar for the examples below. Each one perceives, plans, acts, and learns inside a real support workflow. Here's the shortlist before the detail.
| AI agent example | The job it does | Real proof point | Pricing model |
|---|---|---|---|
| eesel AI | Resolves helpdesk tickets and chats | 73% of tier-1 resolved in month one (Gridwise) | $0.40 per ticket |
| Ada | Omnichannel CX across voice + digital | 34%+ higher resolution at Cebu Pacific | Quote only |
| PolyAI | Answers customer phone calls | $7M+ incremental revenue at Fogo de Chão | Per minute, quote only |
| Moveworks | Internal IT and HR self-service | 50% fewer live chats at CVS Health | Per employee, quote only |
| Siena | E-commerce support and post-purchase | Up to 80% of interactions automated | $750/mo + $0.90/ticket |
| Decagon | High-volume customer deflection | 80% deflection at Duolingo | Quote only |
| Sierra | Enterprise outcomes-based CX | Used by SiriusXM, Sonos, SoFi | Outcomes-based |
1. The helpdesk ticket agent: eesel AI
This is the one I work on, so I'll be precise about what it does. eesel AI is an AI agent that lives inside the helpdesk you already use (Zendesk, Freshdesk, Front, HubSpot) and resolves the everyday ticket and chat queue. It's the cleanest example of the agent loop in a support context: it reads an incoming ticket, pulls context from your past tickets and help docs, drafts or sends a reply, and triages or escalates the rest.
What makes it a useful example rather than a demo is the safety machinery around the loop. eesel trains on your real ticket history, so its answers sound like your team, and you can simulate it against thousands of past tickets to see the resolution rate before launch. Confidence-based routing keeps it from guessing. Gridwise saw it resolve 73% of tier-1 requests in the first month, and Smava runs it on 100,000+ tickets a month. Pricing is 40 cents per resolution with no per-seat fee, so it's the example you can actually trial this week. Where you'd reach for it: any team whose pain is the digital ticket and chat backlog.
2. The omnichannel CX agent: Ada
Ada is the example of an AI agent built as a standalone layer spanning every channel at once. It runs voice, chat, email, WhatsApp, SMS, and Instagram from one multi-LLM Reasoning Engine, and brands its category "Agentic Customer Experience." It's a good illustration of what an agent looks like at the top of the market: airline Cebu Pacific reports a 34%+ higher automated resolution rate versus their old chatbot.
The catch is the gate: Ada's pricing states it's a fit for companies with at least 300,000 annual conversations, with no public price. Where you'd see it: large consumer brands with serious omnichannel volume. For everyone else, our Ada breakdown covers the more accessible alternatives.
3. The voice agent: PolyAI
If the agent examples above handle text, PolyAI is the one that picks up the phone. It builds enterprise voice agents that hold natural, human-sounding calls on its proprietary Raven model, trained on 1B+ conversations. It's the clearest example of an agent operating in a channel that used to be human-only, and it's proven on hard calls: fraud, outages, multilingual disputes.
Restaurant brand Fogo de Chão says PolyAI is on track to add $7M+ in incremental revenue, and it's billed per minute of call. Where you'd see it: contact centers drowning in inbound calls. It's worth browsing the wider AI voice companies field if voice is your priority.
4. The internal support agent: Moveworks
Not every AI agent faces customers. Moveworks is the example pointed inward: an agent that answers employees' IT, HR, and finance questions and automates the tasks behind them (resetting access, filing requests) across 100+ internal systems. ServiceNow acquired it for ~$2.85B, which tells you how seriously the enterprise takes internal-support agents.
The proof is real: CVS Health saw a 50% reduction in live agent chats within 30 days, and Amadeus gave back 16,000+ hours a month. Pricing is per-employee headcount, quote-only, and firmly enterprise. Where you'd see it: large orgs with thousands of staff and a heavy internal-ticket load. (eesel does this job too, as an internal helpdesk for IT teams, without the enterprise floor.)
5. The e-commerce agent: Siena
Siena is the example tuned to one vertical: DTC and e-commerce. It runs support, shopping recommendations, and post-purchase flows (order tracking, returns, refunds, subscription pauses) on top of helpdesks like Gorgias and Zendesk, with brand-voice "AI Personas." It shows what an agent looks like when it's deeply wired into commerce tools (Shopify, Recharge, Loop Returns) rather than being a general assistant.
Siena says brands automate up to 80% of interactions, and its pricing is unusually transparent for this category: a $750/month platform fee plus $0.90 per automated ticket. The recurring G2 gripe is escalation, where it can keep responding after it should have handed off. Where you'd see it: Shopify and DTC brands handling WISMO and returns at volume.
6. The high-volume deflection agent: Decagon
Decagon is the example built for sheer scale. Its wedge is "Agent Operating Procedures," natural-language instructions that compile into executable code, so CX teams can author agent logic without living in a flow builder. It runs one agent across chat, voice, email, and SMS, aimed at high-volume consumer brands, and grounds answers in an AI knowledge base rather than a static script.
The numbers are the story: Duolingo reports 80% deflection, ClassPass a 95% cost reduction, and Chime 70% chat-plus-voice resolution. Pricing is sales-led and bracketed by monthly ticket volume. Where you'd see it: enterprises replacing a brittle incumbent bot. A Duolingo operator's line sums up the appeal of a real agent over a flow tool:
"With the previous vendor, at least half my week was dedicated to maintaining their system. With Decagon, it's been a night-and-day difference."
Duolingo, via Decagon case study
7. The enterprise outcomes-based agent: Sierra
Sierra is the example that rethinks the commercial model as much as the tech. Co-founded by former Salesforce co-CEO Bret Taylor, it's an AI-first CX agent for big consumer brands, and it charges outcomes-based pricing, so you pay when the agent resolves the job, not per seat or per message. Its "Ghostwriter" feature is an agent that builds agents from your SOPs and transcripts.
Its logo wall (SiriusXM, Sonos, SoFi, Rocket Mortgage, Vanguard) shows the kind of regulated, brand-sensitive buyer an outcomes model appeals to, and it leads with rare compliance like ISO 42001 for AI management. Where you'd see it: enterprises that want vendor risk tied to results.
How these examples actually differ
Lay the seven side by side and a map appears. Some agents face customers, one faces employees. Some specialize in a channel (PolyAI on voice), some in a vertical (Siena in commerce), some span everything (Ada, Decagon). And the pricing models are genuinely different animals.

The deeper split is the one I flagged at the top, and it's worth seeing drawn out, because it's the question a buyer should ask of any "AI agent" pitch: does it just talk, or does it act?

The tools that genuinely clear the agent bar do the second thing. They take actions across your systems, finish the request, and hand off cleanly when they can't, which is exactly the behaviour you want to test for before you buy.
Putting an AI agent to work without the risk
The examples above range from "live this week on your existing helpdesk" to "six-figure annual enterprise contract." Wherever you land, the deployment playbook is the same: ground the agent in your real help docs and ticket history, simulate it against past conversations so you can see the resolution rate before a customer is affected, and use confidence thresholds plus clean escalation so it only auto-handles what it's sure of. Start on a slice of your volume and widen it as the numbers earn it.
If you want to try the helpdesk-ticket example yourself, eesel AI is the most accessible on this list. It connects to your helpdesk in minutes, learns from your past tickets so it already sounds like your team, and lets you run a full simulation against your historical conversations before it goes live.

Confidence-based routing means it only auto-answers what it's sure of and escalates the rest with full context, and at 40 cents per resolution with no per-seat fee, you can start small and scale as it proves out. It's free to try.
Frequently Asked Questions
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Article by
Alicia Kirana Utomo
Kira is a writer at eesel AI with a Computer Science background and over a year of hands-on experience evaluating AI-powered customer service tools. She focuses on breaking down how helpdesk platforms and AI agents actually work so that support teams can make better buying decisions.






