Retell AI is an AI voice agent platform designed to automate inbound and outbound phone calls. Its agents respond in under 600ms, support 31+ languages with native speech models, and handle complex multi-turn conversations. The platform offers a no-code drag-and-drop builder for structured conversation flows, as well as complete API access for developers. Each account gets 20 free simultaneous calls. Retell AI is SOC 2 certified, HIPAA-compatible and supports SSO for enterprise environments. No platform fees — you only pay for what you use.
What is Retell AI?
The essentials
Retell AI is an infrastructure platform for AI voice agents. It enables any organization to create, deploy, and manage agents capable of conducting complex phone conversations in real time. The platform supports both inbound calls (customer support, appointment scheduling) and outbound calls (prospecting, follow-ups, reminders).
Key features
Retell AI stands out with its 600ms response latency, ensuring conversational fluency close to natural speech. The platform supports 31 languages with native speech models and automatic caller language detection. The no-code drag-and-drop builder lets you create structured conversation flows. The complete API gives developers full control over integration. Smart interruption logic lets the caller cut off the agent for corrections or questions.
Use cases
Sales teams deploy Retell AI agents for outbound prospecting and lead follow-up. Healthcare companies use it to automate appointment scheduling in full HIPAA compliance. SaaS companies reduce customer support costs by handling level-1 requests with voice agents. E-commerce platforms automate order confirmations and shipment tracking.
Advantages
Retell AI lets you instantly scale phone capabilities without hiring or training staff. 24/7 availability improves customer experience. The usage-based model with no platform fees guarantees complete flexibility. SOC 2 and HIPAA certifications unlock deployments in the most demanding sectors.
Pricing
Retell AI operates on a usage-based pricing model with no subscription or fixed platform fees. The base cost is $0.07/min for the voice engine, plus LLM costs and telephony. Each new account receives $10 in free credits. Enterprise plans with negotiated rates are available for high volumes.
Conclusion
Retell AI is a mature and reliable platform for organizations looking to deploy AI voice agents at scale. Its 600ms latency, multilingual support, and compliance certifications make it a top choice for demanding sectors. The usage-based pricing model requires good volume anticipation, but the value proposition is clear.