Retell AI

Retell AI is an AI voice agent platform that enables the deployment and management of automated phone, chat, and SMS interactions.

Retell AI provides infrastructure for building and deploying conversational voice agents designed for call centers. The platform uses proprietary voice AI orchestration, low-latency speech recognition, and LLM-powered conversation understanding to manage inbound and outbound phone calls. It allows users to automate tasks like appointment booking, lead qualification, and order status updates, while integrating with CRM and telephony systems. The system includes features for mid-call human handoffs, SMS messaging, and web chat. Security compliance includes HIPAA, SOC2 Type II, GDPR, and ISO 27001, with options for enterprise-grade self-hosting.

Retell AI at a glance

Best for: Support, Software engineer
Runs on: Web, API
Pricing: $0.07-$0.31 per minute for voice agents; $0.002+ per message for chat agents; enterprise plans with custom pricing available.
Released: May 2024
Category: AI audio tool
Website: retellai.com

Key features

Voice AI orchestration with ~600ms latency
Proprietary turn-taking model for natural dialogue
Support for telephony via SIP trunking
CRM and system automation through function calling
Real-time call routing and human agent transfer
Omni-channel support for voice, chat, and SMS
Configurable role-based access control and SSO

Use it for

Automating inbound and outbound customer service calls
Booking and scheduling appointments
Qualifying sales leads
Updating systems and logging tickets post-call

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