PolyAI vs Retell AI
Which Agents AI tool is better in 2026?
PolyAI
The world's most lifelike voice AI agents for enterprise customer service.
Retell AI
Hire your AI call center for sales, support, and appointment scheduling
Side-by-side
PolyAI is the more established option (raised $120M); pricing is comparable on both sides.
| Metric | PolyAI | Retell AI |
|---|---|---|
| Taglinei | The world's most lifelike voice AI agents for enterprise customer service. | Hire your AI call center for sales, support, and appointment scheduling |
| Foundedi | 2017🏆 | 2023 |
| HQi | London, GB | US |
| Employeesi | 201-500🏆 | 1-10 |
| Neuron scorei | 70🏆 | 60 |
| Total fundingi | $120M🏆 | Undisclosed |
| Latest roundi | Series C · May 2024 | Seed |
| Valuationi | — | — |
| Cheapest paid plani | — | — |
| Free plani | ✗ | ✓ Free Trial |
| Free triali | ✓ | ✓ |
| Top tier pricei | Enterprise · Contact sales | Enterprise · Contact sales |
| Pricing summaryi | 1 published plans | 2 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for PolyAI and Retell AI.
| Capability | PolyAI | Retell AI |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | 2 (JavaScript, Python) | 2 (JavaScript, Python) |
| Free plan | ✗ | ✓ |
| Free trial | ✓ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of PolyAI
- Has raised more capital ($120M vs Undisclosed)
- Higher Neuron score (70 vs 60)
- More mature (2017)
🔵 Strengths of Retell AI
- Offers a free plan
- Newer company (2023)
Which should you choose?
Choose Retell AI if price matters most — it starts at Free, 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 PolyAI if you want the most established option — it has raised $120M, 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
PolyAI vs Retell AI — which is better?
It depends on your priority. PolyAI has raised more capital and is the more established option; Retell AI has broader feature depth. See the side-by-side table above.
Is PolyAI cheaper than Retell AI?
No — Retell AI's cheapest paid plan is Free, while PolyAI's is Enterprise · Contact sales.
Do PolyAI and Retell AI offer free plans?
PolyAI: Free trial only. Retell AI: Yes, has a free plan.
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