Cresta vs Sierra
Which Agents AI tool is better in 2026?
Cresta
Generative AI for the contact center
Sierra
Conversational AI agents for every business
Side-by-side
| Cresta | Sierra | |
|---|---|---|
| Tagline | Generative AI for the contact center | Conversational AI agents for every business |
| Founded | 2017 | 2023 |
| HQ | Palo Alto, US | San Francisco, US |
| Employees | 101-250 | 100-200 |
| Total funding | $271M | $1.3B |
| Latest round | Series D · Nov 2024 | Series C · Sep 2025 |
| Valuation | $1.6B | $10B |
| Cheapest paid plan | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Top tier price | Enterprise Custom · Contact sales | Enterprise · Contact sales |
| Pricing summary | 1 published plans | 1 published plans |
| Categories |
Capability matrix
Developer-facing capabilities and access signals for Cresta and Sierra.
| Capability | Cresta | Sierra |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✓ | ✓ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Cresta
- More mature (2017)
🔵 Strengths of Sierra
- Has raised more capital ($1.3B vs $271M)
- Higher Neuron score (61 vs 45)
- Newer company (2023)
Which should you choose?
Choose Sierra if price matters most — it starts at Enterprise · Contact sales, which is friendlier for teams watching burn. Both AI Agents tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Sierra if you want the most established option — it has raised $1.3B, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
Frequently asked questions
Cresta vs Sierra — which is better?
It depends on your priority. Cresta is the leaner option; Sierra has broader feature depth. See the side-by-side table above.
Is Cresta cheaper than Sierra?
No — Sierra's cheapest paid plan is Enterprise · Contact sales, while Cresta's is Enterprise · Contact sales.
Do Cresta and Sierra offer free plans?
Cresta: Paid only. Sierra: Paid only.
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