Decagon vs Sierra — Pricing, Plans, and Verified Costs (2026)
Both Decagon and Sierra use custom pricing — request quotes from each to compare.
How pricing works
These two tools don't price the same way, so the headline numbers below aren't directly comparable until you plug in your own volume.
- Decagon (Per Usage) — Decagon bills purely on usage. There is no fixed per-seat fee, so the monthly cost depends entirely on how much you consume.
- Sierra (Per Usage) — Sierra bills purely on usage. There is no fixed per-seat fee, so the monthly cost depends entirely on how much you consume.
Per-minute, per-credit and per-token rates exclude any downstream model, speech or telephony costs unless the vendor states otherwise.
AI-native customer support agent platform. Decagon builds autonomous AI agents for support ops, focused on complex multi-step resolutions. Enterprise-only, all pricing custom-quoted. Reported deals start $100K+/year; well-known customers include Duolingo, Notion, Substack. Raised $131M Series B in 2026.
AI-native customer experience platform founded by Bret Taylor (ex-Salesforce COO) and Clay Bavor (ex-Google). Positioned to compete with Ada + Decagon at the strategic enterprise level. All pricing custom-quoted, reported deals $200K-1M+/year. Customers include WeightWatchers, SonderMind, SoFi.
All plans compared
| Tier role | Plan | Decagon monthly | Decagon annual | Sierra monthly | Sierra annual |
|---|---|---|---|---|---|
| Enterprise | Enterprise | Custom | Custom | Custom | Custom |
Tier names differ across vendors. Rows are aligned by tier role, not name. Full tier structures on each tool's page.
What each is best for
Decagon is worth it if… Decagon is worth engaging with if you're a mid-market or enterprise support org looking to replace tier-1 human agents with autonomous AI. Positioning is against Ada and Sierra; Decagon's angle is deep enterprise-workflow integration (Zendesk/Intercom/Salesforce Service Cloud).
Sierra is worth it if… Sierra is only worth engaging with if you're a mid-market or enterprise support org running a serious evaluation of autonomous AI agents — the co-founders' pedigree (Bret Taylor ex-Salesforce COO) opens doors that other startups can't. Deal size $200K-1M+/year.
Bottom line: Similar positioning, closer to a preference call than a strategic one.
Choose Decagon over Sierra if…
Choose Decagon if…
- You want to pay only for actual usage (per usage, custom pricing).
- You match the profile Decagon is built for: worth engaging with if you're a mid-market or enterprise support org looking to replace tier-1 human agents with autonomous AI.
- You need a general-purpose customer support option rather than a vertical-specific one.
Choose Sierra if…
- You want to pay only for actual usage (per usage, custom pricing).
- You match the profile Sierra is built for: only worth engaging with if you're a mid-market or enterprise support org running a serious evaluation of autonomous AI agents — the co-founders' pedigree (Bret Taylor ex-Salesforce COO) opens doors that other startups can't.
- You need a general-purpose customer support option rather than a vertical-specific one.
At a glance
| Decagon | Sierra | |
|---|---|---|
| Free plan | No | No |
| Entry price | Custom | Custom |
| Enterprise available | Yes | Yes |
| Pricing model | Per Usage | Per Usage |
| Last verified | September 20, 2026 | September 20, 2026 |
| Full pricing | View full pricing | View full pricing |
Pricing last verified September 20, 2026. Tracked daily.