For a large enterprise, the best-documented AI customer service platform is Ada, the most certified is Sierra, and the most common choice for companies standardized on a suite is that suite's own agent. None of the specialist enterprise platforms publishes a price, so the real work is in the contract.
Our general score rewards public pricing and self-serve trials, which enterprise platforms do not offer. Read this list with that in mind: here, evidence, compliance and data residency matter more than whether you can sign up with a credit card.
Quick picks
- Most public evidence: Ada — median contract $72,000 across 114 purchases, many named results, European storage option.
- Most certifications: Sierra — SOC 2 Type II, ISO 27001, ISO 42001, PCI DSS Level 1 and FedRAMP High.
- Highest-volume deployments: Decagon — median contract $432,750; Chime reports 70% across chat and voice.
The ranking
Intercom Fin
Teams that want a price they can calculate today9.1- Price from
- $0.99 per resolution
- Pricing model
- Per resolution
- Works on your existing helpdesk
- Yes
- Self-serve sign-up
- Yes
Fin is the AI agent from the company formerly called Intercom, which renamed itself Fin in May 2026. It runs inside the Intercom helpdesk or on top of another one, charges $0.99 per outcome, and documents more about its pricing, languages and certifications than any other product we reviewed.
The catch: Customer silence for 24 hours is billed as a resolution, and so is a handoff to a human that you configured. Salesforce has agreed to buy the company.
Zendesk AI Agents
Teams already running support on Zendesk7.5- Price from
- $55 per seat per month
- Pricing model
- Seats plus usage
- Works on your existing helpdesk
- Requires Zendesk Suite
- Self-serve sign-up
- Yes
Zendesk's AI agents are built into Zendesk Suite and Support plans. Since May 2026 the agentic features are included in every plan and only resolutions verified by a model are billed. What Zendesk still does not publish is what a resolution costs.
The catch: The price per automated resolution is not published anywhere. The only figure in the open is a 2025 forum comment from a Zendesk product manager.
Ada
Mid-market and enterprise teams that want an agent on top of their current helpdesk7.4- Price from
- est. $36,079 per year
- Pricing model
- Quote only
- Works on your existing helpdesk
- Yes
- Self-serve sign-up
- No
Ada is a Toronto company whose agent works across messaging, email and voice on top of the helpdesk you already have. It sells by quote, but it is the one enterprise vendor with substantial procurement data: a median contract of $72,000 a year across 114 purchases.
The catch: Ada's own AI decides which conversations count as billable resolutions, and the contract allows the count to be calculated from a sampled rate.
Sierra
Very large consumer brands that want a managed build6.2- Price from
- Quote only
- Pricing model
- Quote only
- Works on your existing helpdesk
- Yes
- Self-serve sign-up
- No
Sierra, founded by Bret Taylor and Clay Bavor, sells AI agents for support, sales and retention to very large companies. Pricing is outcome-based and entirely by quote. It has the longest list of security certifications we found and publishes no prices, hosting regions or connector list.
The catch: Unresolved conversations are free "in most cases", and some traffic is billed per conversation regardless of outcome. The billable outcome is defined contract by contract.
Salesforce Agentforce
Organizations already committed to Salesforce Service Cloud5.9- Price from
- $2 per conversation
- Pricing model
- Mixed
- Works on your existing helpdesk
- Requires Salesforce
- Self-serve sign-up
- No
Agentforce is Salesforce's AI agent platform for Service Cloud. It acts directly on CRM data and offers more pricing models than any rival: per conversation, per action with Flex Credits, per user, and since July 2026 per resolution with Help Agent.
The catch: The $2 per conversation plan bills whether or not the issue is resolved, and the pricing has changed repeatedly.
Decagon
Large enterprises with high volume and a six-figure budget5.8- Price from
- est. $105,000 per year
- Pricing model
- Quote only
- Works on your existing helpdesk
- Yes
- Self-serve sign-up
- No
Decagon builds AI agents for chat, email and voice at large consumer, fintech and telecom brands. It publishes no prices and offers no trial. Procurement data puts the median contract at $432,750 a year.
The catch: No public prices, and the pricing most often observed by buyers is per conversation, so you may pay for conversations the AI does not resolve unless you negotiate otherwise.
Forethought
Teams that want an agent layer across several support systems5.6- Price from
- Quote only
- Pricing model
- Quote only
- Works on your existing helpdesk
- Yes
- Self-serve sign-up
- No
Forethought sells AI agents for chat, email and voice that sit on top of existing helpdesks. Zendesk completed its acquisition in March 2026 and now sells the product as Forethought AI Agents by Zendesk, including to customers on other helpdesks.
The catch: It is owned by a helpdesk vendor, hosting is in the United States only, and the billable outcome is not defined anywhere public.
Comparison table
| Product | Score | Pricing model | Price from | Works on your existing helpdesk | Self-serve sign-up | EU data residency | Best for |
|---|---|---|---|---|---|---|---|
| Intercom Fin | 9.1 | Per resolution | $0.99 per resolution | Yes | Yes | Yes | Teams that want a price they can calculate today |
| Zendesk AI Agents | 7.5 | Seats plus usage | $55 per seat per month | No | Yes | Yes | Teams already running support on Zendesk |
| Ada | 7.4 | Quote only | est. $36,079 per year | Yes | No | Yes | Mid-market and enterprise teams that want an agent on top of their current helpdesk |
| Sierra | 6.2 | Quote only | Quote only | Yes | No | Not documented | Very large consumer brands that want a managed build |
| Salesforce Agentforce | 5.9 | Mixed | $2 per conversation | No | No | Yes | Organizations already committed to Salesforce Service Cloud |
| Decagon | 5.8 | Quote only | est. $105,000 per year | Yes | No | Not documented | Large enterprises with high volume and a six-figure budget |
| Forethought | 5.6 | Quote only | Quote only | Yes | No | No | Teams that want an agent layer across several support systems |
How to choose
Make the billable unit a contract term. Sierra's outcomes are defined per contract, Ada's resolutions are graded by Ada's own AI, and Decagon's default observed pricing is per conversation. Insist on a written definition, exclusions and an audit right. Our RFP checklist lists the questions.
Ask where inference happens, not only where data is stored. Several vendors offer European storage while listing US-based model providers as sub-processors.
Use public prices as leverage. Fin at $0.99 per outcome and Agentforce at $2 per conversation are the only published anchors. Bring them to the table.
Insist on a proof of value on your own tickets. Named-customer results range from 45% to 80%. The spread within one vendor is as wide as the spread between vendors.
Verdict
Shortlist Ada, Sierra and Decagon if you want a specialist platform on top of your existing systems, and include your suite vendor's agent as the baseline. Choose on a proof of value and on contract terms, because nothing else about these products can be compared from the outside.
For buyers in the United States
There is no federal AI law for customer service bots, but existing rules apply. The FTC treats misleading AI claims as deception, California requires bots to identify themselves when they are used to sell, and AI voices on outbound calls need consent under the TCPA.
Vendors in this category price in US dollars, so the prices on this site are the prices you will be quoted. If you serve customers in Europe, also check whether the product documents EU data residency and a data processing agreement; each review lists both.
Frequently asked questions
How much do enterprise AI agent platforms cost?
Procurement data from Vendr shows median annual contracts of $72,000 for Ada and $432,750 for Decagon, with Decagon contracts reaching $923,183. We found no procurement data for Sierra.
Which enterprise platforms document EU data residency?
Ada documents an opt-in European storage option, and Zendesk, Salesforce, Fin and Freshworks document EU regions. We found no public statement from Sierra or Decagon, and Forethought documents US hosting only.
Keep reading
- The best AI customer service agents in 2026best list
- The best AI customer service agents for small businessbest list
- The best AI customer service agents for e-commercebest list
- The best AI customer service agents for Zendeskbest list
- The best AI customer service agents for Salesforcebest list
- What counts as a resolution?guide
- How to run an AI agent pilotguide
Sources
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- Sierra homepage — Sierra · September 18, 2026
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- Sierra Voice — Sierra · September 18, 2026
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- Outcome-based pricing for AI agents — Sierra · September 18, 2026
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- AI for call centers — Sierra · September 18, 2026
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- Agentforce product maturity questioned as KeyBanc cites weak customer traction — CIO.com · September 18, 2026
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- Hyperforce public cloud infrastructure — Salesforce · September 18, 2026
- Salesforce achieves ISO 42001 for Agentforce — Salesforce · September 18, 2026
- AI customer service agents — Salesforce · September 18, 2026
- Salesforce signs definitive agreement to acquire Fin — Salesforce · September 18, 2026
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- Decagon security — Decagon · September 18, 2026
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- Chime case study — Decagon · September 18, 2026
- Rituals case study — Decagon · September 18, 2026
- Series D announcement — Decagon · September 18, 2026
- Introducing Duet Autopilot — Decagon · September 18, 2026
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- Decagon (company) — Wikipedia · September 18, 2026
- Forethought Solve — Forethought · September 18, 2026
- Forethought pricing — Forethought · September 18, 2026
- Forethought integrations — Forethought · September 18, 2026
- AI voice agent — Forethought · September 18, 2026
- Multilingual support for Solve — Forethought · September 18, 2026
- Forethought security policy — Forethought · September 18, 2026
- Forethought platform security — Forethought · September 18, 2026
- Forethought FAQ — Forethought · September 18, 2026
- Grammarly achieves 87% deflection and 4.2 CSAT early with Forethought — Forethought · September 18, 2026
- The secret to scaling CX is hidden in the 3 metrics you already track (YAZIO) — Forethought · September 18, 2026
- Zendesk completes acquisition of Forethought — Zendesk · September 18, 2026
- Announcing Forethought AI agents by Zendesk for customers — Zendesk Help · September 18, 2026
- Zendesk to acquire Forethought in major agentic AI play — Computer Weekly · September 18, 2026
- Zendesk acquires agentic customer service startup Forethought — TechCrunch · September 18, 2026
This page was researched and drafted with AI assistance from the sources listed on it. We have not run hands-on tests of these products. Method: How we review