# Retell AI

> Retell AI is an LLM-powered voice agent platform for building, deploying, and managing human-like AI phone agents that automate inbound and outbound calls at scale.

Retell AI is a third-generation AI voice agent platform that uses large language models and proprietary voice orchestration to deliver natural, human-quality phone conversations at scale. It enables businesses to build, deploy, and monitor AI call center agents with ~600ms latency, ultra-realistic voices, and real-time function calling. The platform supports omni-channel communication including voice calls, chat, and SMS, and is trusted by 3,000+ companies across healthcare, financial services, insurance, logistics, and more. Teams can launch in weeks with a drag-and-drop agentic framework and no platform fees—paying only for usage.

- **Drag-and-Drop Agentic Framework**: *Design reliable conversational call flows with built-in guardrails and full control over agent behavior without writing complex code.*
- **Real-Time Function Calling**: *Add built-in or custom functions directly into call flows so agents can book appointments, process payments, update records, and transfer calls live.*
- **Streaming RAG & Knowledge Base**: *Ensure accurate, real-time answers backed by a knowledge base that auto-syncs with your latest website content.*
- **Batch Calling**: *Run outbound call campaigns at scale without concurrency limits, with detailed conversion tracking after each campaign.*
- **Post-Call Analysis & QA**: *Review past calls to surface failure patterns and actionable insights that continuously improve agent performance.*
- **Branded Call ID & Verified Numbers**: *Display your brand on outbound calls and use verified phone numbers to prevent spam labeling.*
- **SIP Trunking / Custom Telephony**: *Connect any existing phone number or VOIP provider via SIP trunking without changing infrastructure.*
- **Enterprise Security**: *HIPAA, SOC2 Type II, and GDPR compliant with SSO, PII redaction, custom role-based access control, and on-prem deployment options.*
- **Simulation Testing**: *Test agents across real-world scenarios before launch to validate behavior, accuracy, and reliability at scale.*
- **Performance Analytics Dashboard**: *Design custom charts to analyze call outcomes, agent performance, and business impact in one place.*

## Features
- AI Voice Agents
- AI Chat Agents
- Drag-and-Drop Agentic Framework
- Real-Time Function Calling
- Streaming RAG Knowledge Base
- Batch Calling
- Post-Call Analysis
- Branded Call ID
- Verified Phone Numbers
- SIP Trunking
- Simulation Testing
- Performance Analytics Dashboard
- Call Transfer
- Appointment Booking
- IVR Navigation
- PII Removal
- Advanced Denoising
- Omni-Channel Communication (Voice, Chat, SMS)
- HIPAA / SOC2 / GDPR Compliance
- SSO
- Custom Role-Based Access Control
- Enterprise On-Prem Deployment

## Integrations
Twilio, Vonage, Go High Level, n8n, Make, HubSpot, ElevenLabs, Cartesia, OpenAI, Anthropic Claude, Google Gemini, Minimax, Fish Audio, Telnyx

## Platforms
WEB, API

## Pricing
Freemium — Free tier available with paid upgrades

## Links
- Website: https://www.retellai.com
- Documentation: https://docs.retellai.com/general/introduction
- EveryDev.ai: https://www.everydev.ai/tools/retell-ai