# Decagon vs 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

- Decagon profile: https://finderatlas.com/tools/decagon
- Siena AI profile: https://finderatlas.com/tools/siena-ai
- Comparison page: https://finderatlas.com/compare/decagon-vs-siena-ai
- Last reviewed: October 2026

## Verdict

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

### 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.

## Pricing

| | Decagon | Siena AI |
| --- | --- | --- |
| Pricing model | Paid | Paid |
| Free plan or trial | No | No |
| Starting price | Custom | $750 |

## Features

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

## Platforms

| Platform | Decagon | Siena AI |
| --- | --- | --- |
| Web | Yes | Yes |
| Windows | No | No |
| macOS | No | No |
| iOS | No | No |
| Android | No | No |
| API | No | No |
| Browser Extension | No | No |

## Decagon strengths

- 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.

## Decagon limitations

- 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 strengths

- 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.

## Siena AI limitations

- $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.

## FAQ

**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.