# Decagon vs Sierra

> Decagon and Sierra side by side: pricing model, published prices, resolution-rate evidence, channels, languages and data residency, with a pick for each kind of buyer.

Published: September 18, 2026 · Updated: September 18, 2026 · Prices and figures verified: September 18, 2026 · By the ai-agents.reviews team

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](https://ai-agents.reviews/en-us/how-we-review)

Decagon and Sierra are the two best-funded specialist platforms for enterprise support, and neither publishes a price. Sierra has more certifications and more messaging channels; Decagon has public procurement data and a published list of helpdesk integrations. Both must be judged on a proof of value and on contract terms.

One caution about customer logos: Chime is named as a customer by both companies.

**Bottom line**

- Run both through the same proof of value. Ask Sierra to define "in most cases" in its no-charge promise, and ask Decagon whether your quote is per conversation or per resolution.

## Side by side

|  | [Decagon](https://ai-agents.reviews/en-us/reviews/decagon) | [Sierra](https://ai-agents.reviews/en-us/reviews/sierra) |
| --- | --- | --- |
| Score | **5.8** | **6.2** |
| Pricing model | Quote only | Quote only |
| Price from | est. $105,000 per year | Quote only |
| Works on your existing helpdesk | Yes | Yes |
| Self-serve sign-up | No | No |
| Free trial | No | Not documented |
| Channels | Chat, Email, Voice | Chat, Email, Voice, SMS, WhatsApp |
| Languages | 70+ languages | 55+ languages |
| EU data residency | Not documented | Not documented |
| Compliance | SOC 2, ISO 27001, HIPAA, PCI DSS, GDPR, CCPA | SOC 2 Type II, ISO 27001, ISO 42001, HIPAA, PCI DSS Level 1, FedRAMP High, GDPR, CSA STAR, AIUC-1 |
| Vendor-claimed resolution rate | 80% (deflection, not resolution) | — |
| Reported figure | 70% (Chime) | 70% (WeightWatchers) |
| Best for | Large enterprises with high volume and a six-figure budget | Very large consumer brands that want a managed build |

## Choose Decagon if

- You want documented integrations with Salesforce, Zendesk, Intercom or Kustomer.
- You value published procurement data: a median contract of $432,750 a year.
- You want simulation testing with mandatory human approval of changes.

## Choose Sierra if

- You need FedRAMP High, PCI DSS Level 1 or ISO 42001.
- You need SMS and WhatsApp as well as chat, email and voice.
- You want pricing tied to outcomes such as saved cancellations, not only resolved conversations.

## Score breakdown

| Criterion | Weight | Decagon | Sierra |
| --- | --- | --- | --- |
| Pricing transparency | 25% | 2/5 | 2/5 |
| Performance evidence | 25% | 4/5 | 4/5 |
| Access and time to pilot | 20% | 1/5 | 2/5 |
| Channel and language coverage | 15% | 4/5 | 4/5 |
| Control and compliance | 15% | 4/5 | 4/5 |

> **Scored on a public rubric, from sources you can open.** Every score on this site comes from five published criteria: pricing transparency, performance evidence, access, coverage, and control. Each price and percentage comes from one product database and links to its source, so every page agrees with every other page. Rubric v1.0 · We have not run hands-on tests yet, and no page here claims we did. [Read the full method](https://ai-agents.reviews/en-us/how-we-review)

## Worked examples

| Product | 1,000 conversations · 50% resolved · 3 seats | 10,000 conversations · 50% resolved · 15 seats | 100,000 conversations · 50% resolved · 80 seats |
| --- | --- | --- | --- |
| Decagon | Quote only | Quote only | Quote only |
| Sierra | Quote only | Quote only | Quote only |

_Estimates from published list prices in USD, verified on the date shown on this page. Taxes, discounts, implementation and overage rules are not included._

## Frequently asked questions

### Which costs more, Decagon or Sierra?

Only Decagon can be estimated: Vendr shows contracts from $105,000 to $923,183 a year. We found no procurement data for Sierra, and figures online for either vendor mostly come from competitors' blogs, which we do not use.

### Does either document EU data residency?

We found no public statement from either company. Both have European offices and customers, so ask for it in writing.

## Related pages

- [Decagon review](https://ai-agents.reviews/en-us/reviews/decagon)
- [Decagon pricing explained](https://ai-agents.reviews/en-us/pricing/decagon)
- [Sierra review](https://ai-agents.reviews/en-us/reviews/sierra)
- [Sierra pricing explained](https://ai-agents.reviews/en-us/pricing/sierra)

## Sources

- [Decagon homepage](https://decagon.ai) — Decagon · September 18, 2026
- [Decagon integrations](https://decagon.ai/product/integrations) — Decagon · September 18, 2026
- [Decagon Voice](https://decagon.ai/product/voice) — Decagon · September 18, 2026
- [Decagon security](https://decagon.ai/security) — Decagon · September 18, 2026
- [AI customer support setup](https://decagon.ai/blog/ai-customer-support-setup) — Decagon · September 18, 2026
- [What is resolution-based pricing?](https://decagon.ai/glossary/what-is-resolution-based-pricing) — Decagon · September 18, 2026
- [Chime case study](https://decagon.ai/case-studies/chime) — Decagon · September 18, 2026
- [Rituals case study](https://decagon.ai/case-studies/rituals) — Decagon · September 18, 2026
- [Series D announcement](https://decagon.ai/blog/series-d-announcement) — Decagon · September 18, 2026
- [Introducing Duet Autopilot](https://decagon.ai/blog/autopilot) — Decagon · September 18, 2026
- [Decagon AI raises $250M at $4.5B valuation](https://siliconangle.com/2026/01/28/decagon-ai-raises-250m-4-5b-valuation-scale-ai-concierge-platform/) — SiliconANGLE · September 18, 2026
- [Decagon company profile](https://sacra.com/c/decagon/) — Sacra · September 18, 2026
- [Decagon AI pricing (buyer data)](https://www.vendr.com/marketplace/decagon-ai) — Vendr · September 18, 2026
- [Decagon (company)](https://en.wikipedia.org/wiki/Decagon_(company)) — Wikipedia · September 18, 2026
- [Sierra homepage](https://sierra.ai) — Sierra · September 18, 2026
- [Sierra product](https://sierra.ai/product) — Sierra · September 18, 2026
- [Sierra Voice](https://sierra.ai/product/voice) — Sierra · September 18, 2026
- [Agent SDK](https://sierra.ai/product/agent-sdk) — Sierra · September 18, 2026
- [Trust and reliability](https://sierra.ai/product/trust-and-reliability) — Sierra · September 18, 2026
- [Outcome-based pricing for AI agents](https://sierra.ai/blog/outcome-based-pricing-for-ai-agents) — Sierra · September 18, 2026
- [Sierra customers](https://sierra.ai/uk/customers) — Sierra · September 18, 2026
- [WeightWatchers customer story](https://sierra.ai/customers/weightwatchers) — Sierra · September 18, 2026
- [Better customer experiences, built on Sierra (funding announcement)](https://sierra.ai/blog/better-customer-experiences-built-on-sierra) — Sierra · September 18, 2026
- [AI for call centers](https://sierra.ai/blog/ai-for-call-centers) — Sierra · September 18, 2026
- [Sierra achieves AIUC-1 certification](https://sierra.ai/blog/sierra-achieves-aiuc-1-certification) — Sierra · September 18, 2026
- [Sierra company profile](https://sacra.com/c/sierra/) — Sacra · September 18, 2026
- [Sierra raises $950M as the race to own enterprise AI gets serious](https://techcrunch.com/2026/05/04/sierra-raises-950m-as-the-race-to-own-enterprise-ai-gets-serious/) — TechCrunch · September 18, 2026

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Canonical: https://ai-agents.reviews/en-us/compare/decagon-vs-sierra