Best AI Customer Service Agents in 2026
Short answer: Fin is the best AI customer service agent in 2026 when you want a public rate and the option to skip new seats. It is $0.99 per outcome on Intercom or on a helpdesk you already run. Teams on Salesforce should price Agentforce at $2 per conversation, or $500 for 100,000 Flex Credits. Shopify brands should use Gorgias, where the annual resolution rate is $0.90 and that resolution also counts as a helpdesk ticket. Yellow.ai is the free-plan path, with 500 resolutions included before a per-resolution fee.
10 tools compared on price, features and fit, with prices checked on vendor pages in September 2026.
The agent replies, takes an action, and closes the issue. The helpdesk is the queue behind it, and buying both without reading the meter turns a pilot into a second contract.
Fin can sit on a desk you already fund, which suits a team that will not add seats. Agentforce meters actions inside Salesforce, so the bill follows usage rather than headcount. Gorgias bills a resolved conversation and a ticket, which means a clean Shopify resolution hits two meters.
Toolradar data: we track 10 AI customer service tools, and 50% of them are free or freemium (0 free, 5 freemium), while 5 (50%) are paid only.
Methodology: these 10 agents were ranked against the 10 tools in the AI for customer service category. Prices were verified on vendor pages in September 2026. No paid placement.
The seat, the ticket bundle, and the inbox comparison live in the AI customer service tools guide, because this page covers only the agent.
Top Picks
Picked by editorial review, informed by G2 and Capterra review volume and rating and by media mentions, the signals behind our category rankings. How we rate
| Tool | Starting price | Rating | Best for |
|---|---|---|---|
| Intercom Fin | From $0.99/outcome | 4.53,906 reviews | Product teams that want a priced agent without buying a new helpdesk. |
| Salesforce Agentforce | From $2/conversation | 3.22,129 reviews | Companies that already run Service Cloud and want the agent in the CRM. |
| Gorgias | From $0.90/resolution | 4.6716 reviews | Shopify brands whose agent should edit orders, returns, and tracking. |
| Zendesk AI agents | From $55/agent/mo | 4.311,165 reviews | Teams whose phone, chat, and email already live in Zendesk. |
| Yellow.ai | Free, then per resolution | 4.4107 reviews | Teams that want to pilot an agent on a free plan before a quote. |
| Ada | Check current pricing | 4.6173 reviews | Enterprises that will commit to a conversation volume on an order form. |
| Decagon | Check current pricing | 4.918 reviews | Large brands that want one agent on chat, voice, and email. |
| Sierra | Outcome-based | 4.414 reviews | Brands that want one agent on chat, SMS, WhatsApp, email, and voice. |
| Forethought | Check current pricing | 4.4177 reviews | Teams that want an agent on Zendesk or on another helpdesk. |
| PolyAI | Per minute, no rate | 5.011 reviews | Contact centers whose customer service agent has to be a phone line. |
Product teams that want a priced agent without buying a new helpdesk.
Intercom is the gold standard for AI-first customer support with its Fin AI agent resolving ~60% of conversations.
Salesforce Agentforce
- 4.3 on G2 (1,477 reviews)
- 1.5 on Trustpilot (610 reviews)
- 3.9 on PeerSpot (42 reviews)
Companies that already run Service Cloud and want the agent in the CRM.
Shopify brands whose agent should edit orders, returns, and tracking.
It's best for businesses with predictable, moderate ticket volumes that can optimize their tier selection.
Teams whose phone, chat, and email already live in Zendesk.
Zendesk publishes yearly agent prices on zendesk.com/pricing.
Watch out
AI agents are included on Support and Suite, then priced on successful resolutions (official FAQ). That is a second meter next to the seat.
Teams that want to pilot an agent on a free plan before a quote.
Yellow.ai's pricing structure is somewhat opaque, with only a 'Free' tier detailed and 'Basic' offering a free trial without clear pricing.
Watch out
Overage fees of $0.99 per resolution after 500 sessions on Free tier.
Enterprises that will commit to a conversation volume on an order form.
Large brands that want one agent on chat, voice, and email.
Brands that want one agent on chat, SMS, WhatsApp, email, and voice.
Sierra's outcome-based pricing is unique and potentially very fair, as users only pay for successful results.
Teams that want an agent on Zendesk or on another helpdesk.
Forethought's pricing, exclusively 'Get a Quote' across all tiers, suggests an enterprise-focused, high-value solution.
Contact centers whose customer service agent has to be a phone line.
What an AI customer service agent is
An AI customer service agent replies to a customer, takes an action in another system, and either closes the issue or hands it to a person.
A helpdesk still needs an owner, a queue, and a history, which is a different purchase from the agent. Zendesk, Gorgias, and Intercom sell that system of record, and the agent is a meter on top. Ada, Decagon, Sierra, and PolyAI sell the agent and expect your existing desk to catch the handoff, so skip them if you still need to buy the queue.
The split that changes the bill is what counts as done. Fin charges a completed Procedure, including a handoff, so a bot that gives up can cost the same as a solve. Gorgias charges a fully automated interaction and also counts it as a ticket, unless a person replies within 72 hours, which is the escape hatch when the automation was wrong. Zendesk draws its allowance only for a verified resolution, and a contained resolution does not spend it, so a silent customer is not always a billed win.
If you still need to pick the queue, start with the helpdesk software guide and come back when the agent is the open question.
Why the resolution definition moves more money than the demo
Five annual Intercom Essential seats are $145. One thousand Fin outcomes add $990, so that month is $1,135 before WhatsApp, SMS, or phone usage. A team that compares seat prices and ignores the outcome line will sign the wrong contract, because the meter can dwarf the seats.
Five Zendesk Suite Team seats are $275 a month on annual billing, and the allowance on that plan is a stipend, not a resolution budget. That stipend will not carry a busy inbox, so you are buying phone, chat, and email with a pilot's worth of AI. Salesforce's own where-is-my-order example is two actions at $0.20, or $120 a month at 20 requests a day, which is a usage bill rather than a seat bill.
Read Intercom vs Zendesk when the shortlist is those two suites. For a broader agent shortlist that is not tied to a helpdesk, use the AI agents guide.
Key Features to Look For
Billable resolution (Essential)
Fin bills a confirmed resolution, a customer who does not ask for more help, or a Procedure that ends in a handoff, once per conversation, so giving up costs the same as solving. Gorgias bills a fully automated interaction, then drops the AI fee if a person replies within 72 hours, and the ticket still counts. Zendesk bills a verified resolution only, and does not spend the allowance on an assisted escalation or a contained resolution.
Seat requirement (Essential)
Fin on a helpdesk you already run has no seat fee, and the example commitment is 50 outcomes, which is the path when the inbox is already paid for. Agentforce customer volume is conversations or Flex Credits, while the $125 add-on is unmetered employee usage and does not answer customers. Gorgias is not priced per agent, which suits a store whose headcount is the wrong unit.
Channel the agent actually covers (Essential)
PolyAI prices ongoing voice use per minute and publishes an uptime SLA, with no public per-minute rate, so you see the unit and not the price. Forethought's Team plan is chat and mobile, while email, voice, and Slack start on Professional, so the entry tier will not cover a phone line. Decagon and Sierra put chat and voice on one agent, which is the wrong buy if you only need a site widget.
Spend cap (Important)
Zendesk can pause AI agents when the allowance is exhausted, or keep going and bill overage, and the default is to allow overage. Salesforce bills usage above the balance at the contracted rate and says there is no overage penalty, so the meter does not stop itself. Confirm the pause switch before launch, because a dashboard alert is not a hard stop.
Actions in systems of record (Important)
Agentforce actions update records, answer from knowledge, and book appointments, at 20 Flex Credits for a standard action and 30 for a voice action, so voice spends the pack faster. Gorgias resolves order, return, and shipping requests, which is why a Shopify brand picks it over a general agent. An agent that only drafts text still leaves the refund click to a person.
Who maintains the agent (Important)
Decagon's Agent Operating Procedures are written in natural language, so operations can change a workflow without an engineering sprint the week a return window changes. Sierra's Ghostwriter builds an agent from SOPs, transcripts, or a plain-language goal, so the first draft does not wait on a services project. A vendor that needs a services project for every policy change will stall that same week.
What to weigh before you sign
Write the billable event in one sentence before you compare rates, because a Fin Procedure, a Gorgias automated interaction, and a Zendesk verified resolution are not the same close, and the cheaper rate can be the costlier event.
If the helpdesk is already under contract, price Fin with no seats, or Forethought on that desk, before you add another suite you will not migrate to.
Phone lines point to PolyAI or Agentforce Voice, Shopify order edits point to Gorgias, and a Salesforce org points to Agentforce, where Flex Credits and Conversations cannot share that org.
Evaluation Checklist
Pull 50 tickets, keep one intent such as order status, and run the agent for two weeks while you count billed events rather than the homepage resolution rate, because that rate is someone else's customer.
Write down the handoff rule before you compare prices: Fin's Procedure can bill a give-up, Gorgias's 72-hour human reply drops the AI fee, and Zendesk's verified resolution is the only event that spends the allowance.
Confirm a switch that stops the agent, because Zendesk's default is to allow overage and Salesforce bills the contracted rate above the credit balance. A dashboard alert will not halt that spend on its own.
Send one real handoff during the trial, and fail the product before you sign if the customer has to repeat the order number.
Pricing Overview
Per outcome
Under a dollar to a dollar
Per conversation or action
Agentforce Conversations, or Flex Credits at $500 per 100,000, where a standard action is 20 credits. Foundations is $0 and does not replace that meter, so the free builder still leaves the customer agent on a paid meter.
Conversation or credits
Suite allowance
Zendesk Suite Team includes the agent, chat, and phone for a team that already lives in that suite. The allowance is a dollar pool per seat, verified resolutions spend it, and Copilot is a separate add-on on Professional and above.
Seat plus stipend
Per minute voice
PolyAI bills ongoing voice use per minute and includes a 99.9% uptime SLA plus a 24/7 emergency line, which is the contract language a phone team needs. The per-minute dollar amount is not published, so you cannot multiply call volume until sales names the rate.
No public rate
Quote only
Ada sells conversation commits on an order form, which is predictable only if volume is stable. Decagon, Sierra, and Forethought withhold a list price, and Forethought offers a proof of value rather than a free trial.
No public price
Pricing Comparison
| Agent | Best for | Entry price | Meter | Free plan |
|---|---|---|---|---|
Fin (Intercom) | Agent with or without new seats | $0.99/outcome | Once per conversation | No (14-day trial) |
Agentforce | Teams on Salesforce | $2/conversation | $500 per 100k credits | Foundations is $0 |
Gorgias | Shopify order tickets | $0.90 annual | Also a helpdesk ticket | No |
Email, chat, and phone | $55/agent/mo yearly | $2 allowance per Team seat | No (14-day trial) | |
Pilot before a quote | 500, then $0.99 | Enterprise is a quote | Yes, 1 agent | |
Ada | Conversation commits | Check current pricing | Overage at then-current rates | Not published |
Decagon | Chat, voice, and email | Check current pricing | No public rate | Not published |
Sierra | Many channels, outcome priced | Check current pricing | No published dollar rate | Not published |
Forethought | Zendesk or another desk | Check current pricing | Platform fee plus outcomes | POV, not a trial |
Phone lines | Per minute, no public rate | 99.9% uptime SLA | Not published |
Verified September 2026 on vendor pages: Intercom pricing, Salesforce Agentforce pricing, Gorgias pricing, Zendesk pricing and the resolution-allowance help article, Yellow.ai pricing, PolyAI pricing. Ada's customer terms (updated June 2, 2025) set renewal and overage rules. Decagon, Sierra, and Forethought published no dollar rate.
Mistakes to Avoid
- ×
Treating Fin, Gorgias, and Zendesk as the same per-resolution product. A Procedure handoff can bill on Fin, a human reply within 72 hours removes the Gorgias AI fee, and a Zendesk contained resolution does not spend the allowance.
- ×
Buying Zendesk Support Team at $19 because it looks like the agent plan. The Suite Team card is where AI agents, chat, and phone are listed, and the FAQ does not match that card, so the cheaper seat can leave you without the agent.
- ×
Assuming Agentforce Foundations at $0 includes customer conversations, when the builder is free and Conversations and Flex Credits are the separate meter, and they cannot share an org.
- ×
Counting a Gorgias AI resolution once, when the interaction is also billed as a helpdesk ticket and Quick Responses spend the same allotment, so a macro can eat the agent budget.
- ×
Adding Forethought on top of Zendesk AI agents without a second budget. Forethought plans do not include the default resolution allowance, and overage is locked on, so the stack can bill twice.
Expert Tips
- →
Pilot one intent for two weeks and export billed outcomes, not the resolution rate on the homepage, because that rate is the vendor's best customer.
- →
If the helpdesk contract is already signed, price Fin with the example 50-outcome commitment before you add seats, because new seats are a second contract. The desk comparison is the AI customer service tools guide.
- →
For a Salesforce org, model the where-is-my-order example at $120 a month before you look at the $125 employee add-on, which does not answer customers.
- →
Down to voice only, read the AI voice agents guide and the enterprise AI agents guide before you take four sales calls.
Red Flags to Watch For
- !
A resolution rate with no definition is a marketing number, and Fin, Gorgias, and Zendesk do not bill the same event. Decagon's 70% and 80% figures are single customer stories, so they do not belong in your forecast.
- !
Zendesk's Team allowance is a stipend, and five seats of it will not carry a busy month. The yearly cap is $5,000, and unused months do not roll, so you cannot bank a quiet month.
- !
Gorgias overage is $1.50 per extra automated interaction, and the same interaction also counts as a helpdesk ticket unless a person replies within 72 hours, which means the burst price and the ticket can land together.
- !
A quote-only agent with a percentage on the homepage is not a price. Ada's renewal step-up is 10% unless the order form waives it, and that step-up belongs in the first contract review.
The Bottom Line
Pick Fin when you want a public outcome rate and you may already own the helpdesk, because that avoids a new seat line. Pick Agentforce when the customer record lives in Salesforce, and accept that the two meters cannot share an org. Pick Gorgias when the agent must edit Shopify orders, and remember the ticket meter underneath.
Zendesk Suite Team is the agent inside a phone-and-chat suite, funded by a small allowance that will not carry a busy month. Yellow.ai is the free-column pilot for a team that will not start on a quote. Ada, Decagon, Sierra, Forethought, and PolyAI do not publish a dollar rate, so they are sales-cycle buys.
How we ranked: 10 agents from the 10 tools in this category, vendor prices checked September 2026, no paid placement. Cite this: Toolradar, "Best AI customer service agents 2026", September 2026.
Frequently Asked Questions
What is the best AI customer service agent in 2026?
Fin is the best default in 2026 when you want a public per-outcome rate and can run the agent without new seats, which fits a team that already pays for a helpdesk. Choose Agentforce when you already pay for Salesforce and can live with either conversations or Flex Credits, not both in one org. Choose Gorgias when the work is Shopify orders and a resolution also counts as a ticket. Choose Zendesk Suite Team when phone, chat, and email already share that suite. The inbox ranking is the AI customer service tools guide.
How much does an AI customer service agent cost in 2026?
Verified September 2026, five Intercom Essential seats are $145 a month on annual billing, and one thousand Fin outcomes add $990, which puts that month at $1,135 before messaging or phone. Agentforce conversations use the rate in the table, or Flex Credits at $500 per 100,000. Salesforce's order-status example is $120 a month at 20 requests a day, a usage bill rather than a seat bill. Five Zendesk Suite Team seats are $275 before the allowance is spent, and that allowance is a stipend. Gorgias Starter is $40 a month for 50 tickets and 30 automated interactions. Ada, Decagon, Sierra, Forethought, and PolyAI do not publish a dollar rate.
Is there a free AI customer service agent in 2026?
Yellow.ai's free column includes 1 agent and 500 resolutions a month, then a per-resolution fee, with Enterprise on a quote, so the free plan is a pilot rather than a production inbox. Salesforce Foundations includes the builder and does not include customer conversation volume, so that free tier will not answer customers. Intercom's trial is 14 days with no card, and Zendesk's trial is 14 days on Suite Professional. Qualifying startups can get six months of Zendesk Suite for up to 50 agents. Ada, Decagon, Sierra, and Forethought do not publish a free plan. Forethought offers a proof of value instead of a trial.
Fin vs Salesforce Agentforce: which agent should I buy?
Fin charges per outcome, once per conversation, and the external version has no seat fee, with the example minimum at 50 outcomes, which suits a team keeping its current helpdesk. Agentforce charges per conversation or per Flex Credit action, and those two models cannot share an org. Foundations is the builder at no charge, and the $125 user add-on is unmetered employee usage, not the customer agent. Pick Fin when the helpdesk can stay put, and pick Agentforce when the case, the contact, and the action already live in Salesforce.
Does a Gorgias AI resolution also count as a helpdesk ticket?
Yes. Gorgias charges each automated interaction as a helpdesk ticket too, at $0.90 on annual plans or $1.00 on monthly plans, so a clean resolution is two charges. If a support agent replies within 72 hours, that interaction is charged only as a helpdesk ticket. Overage past the included interactions is $1.50, and Starter's helpdesk overage is $0.40 a ticket. Quick Responses and Flows spend the same automation allotment as the agent.
What does Zendesk charge for an AI agent resolution?
Zendesk does not publish a single price per resolution, so you cannot forecast from a rate card. Suite and Support plans include a dollar allowance per seat, Team at the amount in the table, and the yearly cap is $5,000 with no rollover, so a quiet month does not fund a busy one. Since May 18, 2026, a verified resolution spends that allowance, and an assisted escalation or a contained resolution does not. You can pause the agent at the cap, but the default is to allow overage. Suite Team is $55 per agent on annual billing and is the card that lists the agent with phone and chat.
Which AI customer service agent is best for phone support?
PolyAI is the voice specialist: ongoing use is per minute, it lists a 99.9% uptime SLA, and it does not publish the per-minute rate, so you know the unit and not the price. Agentforce prices voice as 30 Flex Credits per voice action if you are already on Salesforce, which spends the credit pack faster than a standard action. Decagon and Sierra include voice beside chat and email, with no public rate, which fits a brand that wants one agent and will wait on a quote. Zendesk Suite Team includes telephony in the seat, which is the path when that suite is already the system of record. For a wider voice shortlist, see the AI voice agents guide.
Cite this page: Toolradar, "Best AI Customer Service Agents in 2026", updated September 2026, https://toolradar.com/guides/best-ai-customer-service-agents