PolyAI vs Retell AI
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose PolyAI if you want enterprise voice ai agents that answer and resolve customer calls (Supervised agent, usage); choose Retell AI if you want platform to build, test, deploy, and monitor ai voice agents for calls (Autonomous agent, usage).
| PolyAI | Retell AI | |
|---|---|---|
| What it is | Enterprise voice AI agents that answer and resolve customer calls | Platform to build, test, deploy, and monitor AI voice agents for calls |
| Type | platform | platform |
| Autonomy | Supervised agent | Autonomous agent |
| Pricing | usage | usage · $0.07/min voice engine (model + telephony billed on top); Enterprise from $8,000 |
| Best for | enterprise, mid-market | developers, smb, mid-market, enterprise |
| Deployment | saas, api | saas, api |
| Modalities | voice, text, api | voice, text, api |
| Models | proprietary | model-agnostic, gpt, claude |
| Protocols | mcp, rest-api, function-calling | rest-api, function-calling |
| Integrations | Five9, NICE CXone, Twilio, Amazon Connect, Genesys, Salesforce | Twilio, Telnyx, Vonage, ElevenLabs, PlayHT |
| Capabilities | 4 documented | 4 documented |
PolyAI
- +Strong, natural voice quality proven on hard and regulated call types
- +Deep CCaaS and CRM integration plus a proprietary model stack with enterprise compliance
- +Real enterprise traction and NVIDIA backing
- -Opaque, high-floor pricing inaccessible to SMBs
- -Historically heavy managed-service implementation; the self-serve story is newer
Retell AI
- +Provider-flexible: bring your own telephony, voices, and LLM, or use Retell's built-in carrier
- +Structured Conversation Flow Agents (nodes and transitions) give fine control alongside looser prompt-based agents
- +Usage-based pricing with no mandatory base subscription and free credits to start; built-in testing and monitoring
- -Advertised $0.07/min covers only the voice engine; LLM, telephony, and international add to real per-minute cost
- -Building reliable structured flows for complex calls takes meaningful human setup
Which should you choose?
PolyAI is enterprise voice ai agents that answer and resolve customer calls, best for enterprise, mid-market. Retell AI is platform to build, test, deploy, and monitor ai voice agents for calls, best for developers, smb, mid-market, enterprise. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.