How to Build and Deploy a Voice AI Agent with Retell AI
Step-by-step guide to building a human-like phone voice agent with Retell AI, from creating your first agent to wiring it into your app via API.
Retell AI Freemium
Retell AI Voice Agents: Build Custom Phone Agents and Voicebots Fast
What is Retell AI?
Retell AI is a platform for building and deploying human-like voice AI agents that handle phone calls. It combines speech recognition, large language models, and natural text-to-speech to create agents that converse naturally, detect intent, and complete tasks autonomously.
Designed for developers and businesses, Retell AI offers low-latency voice agents, live human handoff, and a flexible API. It is widely used for customer support, sales calls, healthcare intake, and appointment booking, letting teams automate high-volume conversations without sacrificing quality.
Product Features
- Custom voice AI agents with natural, human-like speech and low latency.
- Robust conversation intelligence using large language models for context.
- Live human handoff when an agent needs to transfer to a person.
- Simple REST API and SDKs to integrate agents into your application.
- Tools to build knowledge bases and agent instructions for your domain.
- Scale from simple gigs to complex multi-turn conversations.
Product Highlights
- Production-grade reliability trusted by teams automating real calls.
- Freemium pricing to test and prototype agents before scaling.
- Developer-friendly API that fits into existing workflows.
- Retell AI agents feel natural enough for customer-facing conversations.
Use Cases
- Automate customer support calls and streamline common inquiries.
- Handle sales and lead-qualification calls around the clock.
- Schedule appointments and bookings without human intervention.
- Conduct healthcare intake and patient scheduling conversations.
- Build AI phone assistants for outreach and follow-up campaigns.
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