How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- Decagon is an enterprise purchase, with estimated base pricing from $50,000 to $95,000 per year in one guide and $95,000 to $590,000 in another, so most teams should start with a helpdesk-native AI agent instead.
- Intercom Fin at $0.99 per outcome and Zendesk AI at $1.50 to $2.00 per resolution give the fastest start for teams already on those helpdesks.
- Sierra is the closest enterprise peer to Decagon, with outcome-based pricing and a reported floor from $150,000 per year, aimed at large consumer brands.
- The billing unit decides more than the headline price: per-outcome pricing charges only when the AI finishes, while per-session and per-credit pricing charges for conversations the AI hands over.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 Sierra | Enterprise brands wanting outcome pricing | See website | No |
 Intercom Fin | Outcome-based pricing without an enterprise sales call | $0.99 per outcome | No |
 Zendesk AI | Teams already on Zendesk | $55 per agent/month (Suite Team) | Free trial (14 days) |
 Ada | High-volume enterprise support | See website | No |
 Salesforce Agentforce | Teams already on Service Cloud | $2 per conversation | Partial (Foundations includes credits) |
 Freshworks Freddy AI | Budget-conscious mid-market teams | $19 per agent/month (Freshdesk Growth) | No |
 Help Scout AI Answers | Small teams wanting cheap resolutions | $0.75 per resolution | Free trial (15 days) |
 Gleap Kai | Cheapest per-resolution pricing | $0.29 per resolution | Free trial (7 days) |
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The best Decagon alternatives
#1Sierra
Best for: Enterprise brands wanting outcome pricing4.5/5 on
G2 (131 reviews, checked Oct 2026)
Visit sierra.ai
Starting priceSee website
Free planNo
Sierra is the closest enterprise peer to Decagon, co-founded by Bret Taylor and Clay Bavor, with a managed, outcome-priced agent aimed at enterprise brands with high consumer volume. Pricing is pure pay-for-results, with no seats or conversation counts, and reported annual values from $150,000 to $350,000 or more.
Setup runs months, and the Agent SDK suits teams with developers alongside a studio for non-developers. Sierra fits large consumer brands that want a managed agent with minimal AI operations and outcome-based pricing, and that can absorb an enterprise contract.
What we like- Pure pay-for-results pricing, no seats or conversation counts
- Managed agent with minimal AI operations
- Agents in ChatGPT as well as own channels
Watch out for- Reported floor from $150,000 per year
- Months-long setup
- Enterprise-only fit
#2Intercom Fin
Best for: Outcome-based pricing without an enterprise sales call4.5/5 on
G2 (2,900 reviews, checked Oct 2026)
Visit intercom.com
Starting price$0.99 per outcome
Free planNo
Intercom Fin charges $0.99 per outcome with a 50-outcome monthly minimum, plus seats from $29 per month on annual billing, and it works across many helpdesks, not only Intercom's own. That outcome-based model, without an enterprise sales call, makes it the fastest enterprise-grade start for teams that are not enterprise buyers.
On a standard scenario of 3,000 conversations a month with 60 percent resolved by AI, Fin costs about $1,782 per month on another helpdesk or $2,079 on Intercom Advanced seats. Intercom Fin fits teams wanting outcome-based pricing with low friction, especially existing Intercom customers.
What we like- Per-outcome pricing that works across many helpdesks
- 50-outcome monthly minimum
- Fast start for existing Intercom customers
Watch out for- Seats from $29 per month on top
- No free tier
- Resolution definition matters in the contract
Starting price$55 per agent/month (Suite Team)
Free planFree trial (14 days)
Zendesk AI layers agents onto ticketing at scale, with Suite Team from $55 per agent per month, Professional at $115, and 5 to 10 resolutions per agent per month included before per-resolution charges of $1.50 committed or $2.00 pay-as-you-go apply. The Forethought acquisition adds triage and Agent QA tooling, now merging into Zendesk.
On the standard 3,000-conversation scenario, Zendesk costs about $3,777 per month on Suite Team seats with pay-as-you-go resolutions, the highest in that comparison. Zendesk AI fits teams already standardised on Zendesk that want AI layered on ticketing without a separate platform.
What we like- Advanced AI resolution included in every Suite plan
- 5 to 10 resolutions per agent per month included
- Forethought acquisition adds triage depth
Watch out for- Resolutions cost $1.50 committed or $2.00 pay-as-you-go beyond the included amount
- Highest per-resolution cost in the standard scenario
#4Ada
Best for: High-volume enterprise support4.6/5 on
G2 (173 reviews, checked Oct 2026)
Visit ada.cx
Starting priceSee website
Free planNo
Ada is one of the longest-running dedicated AI customer experience platforms, built for high-volume enterprise support of 300,000 or more conversations per year, with strong multilingual support and proactive messaging. Its no-code self-service suits e-commerce and large consumer brands that need global coverage.
Pricing is quote-based, with estimates from $70,000 per year median in one guide to $100,000 to $400,000 in another, and setup takes weeks. Ada fits large consumer brands and e-commerce teams that need proven multilingual AI at volume, and that can commit to an enterprise contract.
What we like- Longest-running dedicated AI customer experience platform
- Strong multilingual support
- Proactive messaging
Watch out for- Quote-based, with estimates from $70,000 to $400,000 per year
- Weeks-long setup
- Enterprise fit
#5Salesforce Agentforce
Best for: Teams already on Service Cloud4.3/5 on
G2 (1,464 reviews, checked Oct 2026)
Visit salesforce.com
Starting price$2 per conversation
Free planPartial (Foundations includes credits)
Salesforce Agentforce for Service gives Service Cloud teams agentic AI with Prospecting and Service Development agents, priced at $2 per conversation or $500 per 100,000 Flex Credits, with Foundations including credits for a partial free start. Flex Credits cover customer, employee and voice agents in one model, which simplifies budgeting across agent types.
Consumption costs need careful modelling at volume, and Service Cloud complexity suits enterprises more than small teams. Agentforce fits teams already on Service Cloud that want agentic AI without a separate platform, and that can model credit consumption.
What we like- Flex Credits cover customer, employee and voice agents in one model
- Native to Service Cloud
- Data Cloud integration
Watch out for- Consumption-based costs need modelling
- $500 per 100,000 credits
- Enterprise complexity
Starting price$19 per agent/month (Freshdesk Growth)
Free planNo
Freshworks Freddy AI suits budget-conscious mid-market teams, with Freshdesk Growth at $19, Pro at $55 and Enterprise at $89 per agent per month on annual billing, plus AI Agent priced per session rather than per seat. Sessions cost $0.49 each beyond included amounts, with extra sessions at $49 per 100.
On the standard scenario, Freddy costs about $1,575 per month on Freshdesk Omni Growth seats, among the cheapest in that comparison. Freddy fits mid-market teams on Freshdesk that want per-session AI pricing without enterprise contract weight.
What we like- AI Agent priced per session, not per seat
- Growth $19, Pro $55, Enterprise $89 per agent per month
- Budget-friendly
Watch out for- Session packs add cost
- $0.49 per session beyond included amounts
- Extra sessions $49 per 100
Starting price$0.75 per resolution
Free planFree trial (15 days)
Help Scout AI Answers charges $0.75 per resolution, making it cheaper per resolution than Intercom Fin at $0.99 and Zendesk at $1.50 to $2.00, with a 15-day trial for testing. Its simplicity suits small teams that want AI answers without enterprise platform complexity.
The platform is smaller than Intercom or Zendesk, with fewer enterprise features and integrations, so large teams may outgrow it. Help Scout fits small to midsize teams that want the cheapest straightforward per-resolution AI and a fast start.
What we like- Cheap per-resolution pricing
- Simple setup for small teams
- 15-day trial
Watch out for- Smaller platform than Intercom or Zendesk
- Fewer enterprise features
- Resolution definition matters
Starting price$0.29 per resolution
Free planFree trial (7 days)
Gleap Kai Support charges $0.29 per resolution on every plan, the cheapest per-resolution price in this list, with a 7-day trial on every plan. That pricing makes it the lowest-cost way to test AI resolutions at volume, and its comparison of Decagon versus Sierra gives it useful context on the enterprise market.
The vendor is smaller and less proven at enterprise volume than Intercom, Zendesk or Ada, so large teams should pilot carefully. Gleap fits teams of all sizes wanting fast deployment, transparent pricing and the lowest per-resolution cost, especially those testing AI support for the first time.
What we like- Cheapest per-resolution price here
- Available on every plan
- 7-day trial on every plan
Watch out for- Smaller vendor than Intercom or Zendesk
- Less proven at enterprise volume
- Newer platform
How we chose
We compared tools on pricing model, resolution cost, setup time, channel coverage and the limits reviewers cite most often. Sources included a Decagon versus Sierra comparison with October 2026 published prices, an AI customer support tool roundup, a vendor market comparison and a standard-scenario cost model across 3,000 conversations. Where enterprise prices are estimates rather than published rates, the article says so. We did not claim hands-on testing, and actual contracts vary.
What to check before you sign
Start with the billing unit, since it decides more than the headline price. Per-outcome pricing charges only when the AI finishes, so it costs more per resolution and less on hard weeks, while per-session and per-credit pricing charges for conversations the AI hands over. Model your real ticket mix, not a vendor's best case, and compare definitions of "resolution" across contracts.
Next, pilot on real conversations before committing. Both Decagon and Sierra are enterprise purchases that demand pilots on real tickets, reference checks in your industry, and contract definition comparisons. For helpdesk-native tools, run a two-week trial on live traffic and measure resolution rate, handoff quality and customer satisfaction, not just cost.
Finally, check handoff quality over headcount math. AI agents absorb repetitive tier-one volume so human agents spend time on complex, high-value conversations, and teams typically redeploy agents to trickier queues or handle growth without hiring, rather than cutting headcount. A clean handoff with full context matters more than the promised resolution rate.
Frequently asked questions
What is a Decagon alternative?
Any AI customer support agent that resolves conversations without a human, across chat, email, voice or messaging. Sierra is the closest enterprise peer, while Intercom Fin, Zendesk AI, Ada, Agentforce, Freddy, Help Scout and Gleap cover helpdesk-native and mid-market needs.
How much do AI support agents cost?
Pricing combines seat fees with per-resolution or per-conversation charges: Intercom $0.99 per outcome plus seats from $29, Zendesk $1.50 to $2.00 per resolution plus Suite seats from $55, Salesforce $2 per conversation, Freshworks $0.49 per session, Help Scout $0.75 per resolution, and Gleap $0.29 per resolution. Enterprise platforms like Sierra, Decagon and Ada are quote-based.
What resolution rate should I expect?
It depends entirely on ticket mix. Simple, repetitive tickets like order status and password resets can see 60 to 80 percent resolution, while complex billing disputes and technical troubleshooting land much lower. Any vendor promising a single number without seeing your tickets is selling, not advising.
Will AI agents replace my support team?
For most companies, no. They absorb repetitive tier-one volume so human agents handle complex, high-value conversations, and teams typically redeploy staff to trickier queues or handle growth without hiring, rather than cutting headcount.
How long does implementation take?
Helpdesk-native tools like Intercom and Botpress go live in days to weeks, mid-market platforms like Ada take a few weeks, and enterprise deployments with deep integrations, including Sierra, Decagon, Zowie, NiCE Cognigy and Kore.ai, usually run 6 to 12 weeks.
Can AI agents work with my existing helpdesk?
Yes, for most: Intercom Fin runs across many helpdesks, Zendesk AI is native to Zendesk, Agentforce is native to Salesforce, and Freddy is native to Freshworks. Standalone platforms like Sierra, Decagon and Ada integrate with major helpdesks but need setup time.
Sources we checked (6)
- https://www.gleap.ai/blog/decagon-vs-sierra
- https://resources.rework.com/tools/ai-tools/best-ai-tools-for-customer-support-2026
- https://www.twig.so/blog/ai-customer-support-market-2026-vendor-comparison
- https://rankite.com/blog/best-ai-customer-support-agents-software
- https://irisagent.com/blog/best-ai-customer-service-software/
- https://www.robylon.ai/blog/best-ai-email-support-agents
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.