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Decagon vs Siena AI

Features, pricing, ratings, and pros and cons, side by side.

Verdict

Decagon and Siena AI are both AI Customer Support tools. Neither has a free plan.

Best overall

Siena AI

  • E-commerce Brands
  • Direct-to-Consumer Brands
  • Customer Support Teams
  • CX Leaders

Choose Decagon if

  • You want a tool built for large companies with high conversation volume that want AI agents handling chat, email and voice with testing and QA built in.
  • Covers voice, chat and email in one platform rather than chat only.
  • Natural-language AOPs let non-engineers define agent workflows.

Choose Siena AI if

  • You want a tool built for brands with high ticket volume on Shopify and a helpdesk such as Gorgias or Zendesk that want to automate order, return and subscription requests.
  • Wide set of named integrations across helpdesks, subscriptions, returns, shipping and reviews.
  • Covers support, shopping, social, reviews and QA agents on one platform.
Best for beginners
Siena AI
Best for business
Decagon

Features

19 features compared.

  • Agent Operating Procedures (AOPs)
    Decagon
    Available
    Siena AI
    Not available
  • Voice, Chat and Email Agents
    Decagon
    Available
    Siena AI
    Not available
  • Pre-built Integrations
    Decagon
    Available
    Siena AI
    Not available
  • Experiments
    Decagon
    Available
    Siena AI
    Not available
  • Testing & QA
    Decagon
    Available
    Siena AI
    Not available
  • Watchtower
    Decagon
    Available
    Siena AI
    Not available
  • Insights & Reporting
    Decagon
    Available
    Siena AI
    Not available
  • Suggestions
    Decagon
    Available
    Siena AI
    Not available
  • Duet
    Decagon
    Available
    Siena AI
    Not available
  • Personal Agent Detection
    Decagon
    Available
    Siena AI
    Not available
  • Customer Service Agent
    Decagon
    Not available
    Siena AI
    Available
  • Post-Purchase Workflows
    Decagon
    Not available
    Siena AI
    Available
  • Subscription Management
    Decagon
    Not available
    Siena AI
    Available
  • Shopping Agent
    Decagon
    Not available
    Siena AI
    Available
  • Social Agent
    Decagon
    Not available
    Siena AI
    Available
  • Reviews Agent
    Decagon
    Not available
    Siena AI
    Available
  • QA Agent and Topics Explorer
    Decagon
    Not available
    Siena AI
    Available
  • Agent Assist
    Decagon
    Not available
    Siena AI
    Available
  • Guardrails and Controls
    Decagon
    Not available
    Siena AI
    Available

Pricing

Plans as listed by each vendor. Check their sites for current prices.

  • Pricing model
    Decagon
    Paid
    Siena AI
    Paid
  • Free plan
    Decagon
    No
    Siena AI
    No
  • Starting price
    Decagon
    Custom
    Siena AI
    $750
  • Plans
    Decagon
    1 plan
    Siena AI
    2 plans

Decagon plans

  • Enterprise

    Most popular

    Custom/contact sales

    Quote-based contracts for support organizations

    • Chat
    • email and voice agents
    • AOPs
    • Experiments
    • Testing & QA
    • Watchtower
    • Insights & Reporting

Siena AI plans

  • Platform

    Most popular

    $750/month

    Flat fee for access to the core AI system

    • Core AI system
    • unlimited testing environment
    • brand voice and guardrails
    • SAML SSO
    • audit logs
    • SOC 2 Type II

  • Automation Pack

    $0.90/ticket

    Usage charge per automated ticket

    • Billed per automated ticket
    • human handoff
    • business rules

Our ratings

Scored out of 10 by the Finder Atlas editorial team. Last reviewed October 2026.

Decagon
7.6overall
Siena AI
7.8overall

Decagon leads in 1 category and Siena AI in 3, with 1 tied.

  • Ease of Use

    Siena AI leads by 0.3
    Decagon
    7.5
    Siena AI
    7.8

  • Feature Depth

    Decagon leads by 0.2
    Decagon
    8.7
    Siena AI
    8.5

  • Value for Money

    Siena AI leads by 0.4
    Decagon
    6.8
    Siena AI
    7.2

  • Performance & Speed

    Tied
    Decagon
    8.0
    Siena AI
    8.0

  • Documentation & Support

    Siena AI leads by 0.4
    Decagon
    7.2
    Siena AI
    7.6

Scores weigh documented features, plan value, platform coverage, integrations and user feedback. A missing score means we have not rated that area yet.

Pros and cons

Decagon

Pros

  • Covers voice, chat and email in one platform rather than chat only.
  • Natural-language AOPs let non-engineers define agent workflows.
  • Built-in A/B experiments, simulations and always-on QA support ongoing tuning.
  • Large enterprise customer list including airlines, telecoms and fintech companies.
  • Offers a per-resolution pricing option where escalations are not charged.

Cons

  • No published pricing; every deal requires a sales conversation.
  • No free tier or trial advertised, which limits evaluation by small teams.
  • Reviewers have noted limited transparency into why the AI made a given decision.
  • No public API or developer documentation was found on the official site.

Siena AI

Pros

  • Wide set of named integrations across helpdesks, subscriptions, returns, shipping and reviews.
  • Covers support, shopping, social, reviews and QA agents on one platform.
  • Transparent base pricing: $750/month plus $0.90 per automated ticket.
  • Enterprise controls including SOC 2 Type II, SAML SSO and audit logs.
  • Funded company with a $17M Series A and a customer list of recognizable DTC brands.

Cons

  • $750/month minimum platform fee is high for small stores.
  • No free tier or self-serve trial listed.
  • Implementation and support pricing is not published.
  • Focused on e-commerce brands, so less suited to B2B or non-commerce support.

Platforms

  • Web
    Decagon
    Supported
    Siena AI
    Supported
  • Windows
    Decagon
    Not supported
    Siena AI
    Not supported
  • macOS
    Decagon
    Not supported
    Siena AI
    Not supported
  • iOS
    Decagon
    Not supported
    Siena AI
    Not supported
  • Android
    Decagon
    Not supported
    Siena AI
    Not supported
  • API
    Decagon
    Not supported
    Siena AI
    Not supported
  • Browser Extension
    Decagon
    Not supported
    Siena AI
    Not supported

Integrations

Decagon

No integrations listed.

Siena AI

18 integrations
  • Zendesk
  • Gorgias
  • Intercom
  • Dixa
  • Gladly
  • Kustomer
  • Shopify
  • Stripe
  • Recharge
  • Skio
  • Ordergroove
  • Loop Returns
  • AfterShip
  • ShipBob
  • Klaviyo
  • Okendo
  • Yotpo
  • Slack

Company

  • Company
    Decagon
    Decagon
    Siena AI
    Siena AI
  • Founded
    Decagon
    2023
    Siena AI
    2022
  • Headquarters
    Decagon
    San Francisco, CA
    Siena AI
    New York, NY
  • Listing
    Decagon
    Claimed
    Siena AI
    Claimed

Frequently asked questions

Is Decagon better than Siena AI?

It depends on your workflow. Decagon is built for large companies with high conversation volume that want AI agents handling chat, email and voice with testing and QA built in. Siena AI is built for brands with high ticket volume on Shopify and a helpdesk such as Gorgias or Zendesk that want to automate order, return and subscription requests.

What are the key feature differences between Decagon and Siena AI?

Decagon: Enterprise AI agents that resolve customer conversations across chat, email and voice. Siena AI: AI customer service agents that resolve e-commerce support tickets in your brand voice.

Does Decagon or Siena AI have a free plan?

Neither has a free plan. Both Decagon and Siena AI are paid products.

Which is cheaper, Decagon or Siena AI?

Decagon starts at Custom and Siena AI starts at $750. See the pricing table above for what each tier includes.