#1 AI Voice Agent Platform for Automating Calls

An AI voice agent is an autonomous system that can listen, speak, and hold natural phone conversations like a human. It uses speech recognition, large language models, and text-to-speech technology to understand callers, respond intelligently, maintain context, and take actions such as booking appointments or updating systems without relying on rigid scripts or human intervention.

Retell AI is a real-time conversational AI platform that uses proprietary voice AI orchestration with low-latency speech recognition, LLM-powered conversation understanding, and real-time function calling. The platform features a ~600ms latency (industry-leading responsiveness), ultra-realistic voices built from real performance data, and proprietary turn-taking models that know when to speak and listen.​

Creating a voice AI agent with Retell is easy! Sign up for a free account on the Retell dashboard, where you’ll receive $10 of free usage. From there, you can customize and configure your AI voice agent, integrating it seamlessly with your company’s data and workflows

Yes. Retell supports integration with any telephony system through SIP trunking, making it easy to connect your existing phone number and deploy your AI-powered answering service or AI IVR without changing infrastructure.

An AI call center built on Retell AI is a next-generation voice automation platform that deploys LLM-based, humanlike voice agents to handle inbound and outbound calls at scale. These agents can function as AI receptionists, intelligent IVR systems, and outbound AI telemarketing agents while managing phone-based interactions with natural, human-quality conversations and autonomous task execution.

A traditional call center needs people for every call. An AI call center uses voice agents to handle routine calls on their own, so your team only steps in when a human is needed. With Retell, the AI runs around the clock, scales with demand without extra hiring, and transfers complex calls to a live agent.

Retell agents handle both inbound and outbound calls. Inbound, they answer support questions, route callers, and book appointments. Outbound, they handle reminders, confirmations, lead qualification, surveys, and follow-ups. Each call can read and update your CRM, calendar, and other records in real time — then log the outcome automatically. Connect a phone number, set the agent's goal and conversation flow, and it starts taking calls right away.

AI calling is the use of AI voice agents to run phone calls, both answering inbound and placing outbound. Instead of a person dialing or picking up each time, the agent holds a natural conversation, completes the task, and records what happened. It can hand the call to a live agent at any point. Retell supports AI calling for support, scheduling, reminders, lead follow-up, and more on your existing numbers and at any volume.

Retell is SOC 2 Type II certified and HIPAA-compliant, with a self-serve BAA available on every plan. Built-in controls include role-based access, automatic PII redaction, and configurable data retention. For outbound calling, you are responsible for following the consent and disclosure rules that apply in your region and industry. Retell gives you the tools to run AI calling inside your own compliance framework.