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 | Sierra | |
|---|---|---|
| Score | 5.8 | 6.2 |
| Pricing model | Quote only | Quote only |
| Price from | est. US$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 US$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 |
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 |
Frequently asked questions
Which costs more, Decagon or Sierra?
Only Decagon can be estimated: Vendr shows contracts from US$105,000 to US$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 reviewreview
- Decagon pricing explainedpricing
- Sierra reviewreview
- Sierra pricing explainedpricing
Sources
- Decagon homepage — Decagon · 18 September 2026
- Decagon integrations — Decagon · 18 September 2026
- Decagon Voice — Decagon · 18 September 2026
- Decagon security — Decagon · 18 September 2026
- AI customer support setup — Decagon · 18 September 2026
- What is resolution-based pricing? — Decagon · 18 September 2026
- Chime case study — Decagon · 18 September 2026
- Rituals case study — Decagon · 18 September 2026
- Series D announcement — Decagon · 18 September 2026
- Introducing Duet Autopilot — Decagon · 18 September 2026
- Decagon AI raises $250M at $4.5B valuation — SiliconANGLE · 18 September 2026
- Decagon company profile — Sacra · 18 September 2026
- Decagon AI pricing (buyer data) — Vendr · 18 September 2026
- Decagon (company) — Wikipedia · 18 September 2026
- Sierra homepage — Sierra · 18 September 2026
- Sierra product — Sierra · 18 September 2026
- Sierra Voice — Sierra · 18 September 2026
- Agent SDK — Sierra · 18 September 2026
- Trust and reliability — Sierra · 18 September 2026
- Outcome-based pricing for AI agents — Sierra · 18 September 2026
- Sierra customers — Sierra · 18 September 2026
- WeightWatchers customer story — Sierra · 18 September 2026
- Better customer experiences, built on Sierra (funding announcement) — Sierra · 18 September 2026
- AI for call centers — Sierra · 18 September 2026
- Sierra achieves AIUC-1 certification — Sierra · 18 September 2026
- Sierra company profile — Sacra · 18 September 2026
- Sierra raises $950M as the race to own enterprise AI gets serious — TechCrunch · 18 September 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