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Retell AI

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Retell AI helps businesses build and deploy intelligent AI voice agents that sound human on calls, handling customer support, scheduling, and lead qualification 24/7. This reliable, no-code platform integrates with your existing systems, making call operations efficient, scalable, and compliant.

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OverviewFeaturesUse CasesFAQIntegrationsPricing

About Retell AI

Who It's For

This tool is for businesses looking to automate phone calls and improve customer service, sales, or scheduling. If you want to handle more calls efficiently without heavy coding, Retell AI can help your team, often with minimal integration effort.

What You Get

You get AI voice agents that sound natural, respond quickly, and work 24/7. They handle customer support, scheduling, and lead qualification. The platform is secure, compliant, and includes analytics, integrating smoothly with your existing business tools.

How It Works

You build your AI voice agent using an intuitive, no-code builder. Then, test it to ensure smooth conversations. Deploy it for calls, web, or chat. Finally, monitor its performance through a dashboard to track success and make quick improvements.

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Features & Capabilities

⚙️ Core AI Functionality

Voice AI API

Delivers natural, smooth, and empathetic AI conversations with ultra-low latency.

Multilingual Support

Enables agents to support over 18 languages and dial international phone numbers.

Voicemail Detection

Automatically detects voicemails and can leave pre-recorded or dynamic messages.

Inbound & Outbound Calling

Allows AI agents to both make and receive phone calls through various channels.

🚀 Performance & Scalability

Effortless Scalability

Designed to handle millions of calls with robust concurrent calling capabilities.

High Availability

Ensures a reliable and stable platform with 99.99% uptime and automatic fallback.

Ultra-Low Latency

Achieves natural, human-like conversations with response times as low as 500ms.

🛠️ Agent Development Workflow

Intuitive Agent Builder

Provides an API and a user-friendly builder for creating custom voice AI callers.

Comprehensive Testing Tools

Offers built-in LLM features to thoroughly test agents and handle edge cases.

Multi-Channel Deployment

Supports deploying agents across phone calls, web calls, SMS, and chat.

Performance Monitoring

Features a call history dashboard to track success rates, latency, and user sentiment.

🔒 Enterprise Readiness

Full Compliance

Meets industry standards including SOC 2 Type 1&2, HIPAA, and GDPR.

Seamless Integrations

Connects natively and externally with CRMs, telephony, automation platforms, and databases.

Custom Enterprise Solutions

Offers tailored pricing, concurrent call options, and premium support for large-scale operations.

Use Cases

Automating and Enhancing Customer Service Operations

Businesses face challenges with high call volumes and repetitive customer inquiries, leading to long wait times and inconsistent service. Retell AI enables companies to deploy intelligent voice agents that handle FAQs, password resets, and routine transactions with human-like conversation and sub-second latency, freeing up human agents for complex issues and providing 24/7 compliant support.

Customer Service, B2C (Retail, E-commerce, Financial Services), B2B SaaSFor: Customer Service Teams, Call Center Operations, Customer Experience Managers

Scaling Lead Qualification and Outbound Sales Outreach

Sales teams struggle to efficiently qualify leads and conduct consistent follow-ups at scale without significant manual effort. Retell AI allows businesses to deploy voice agents for high-volume outbound calls, automating lead qualification, engaging prospects, and performing follow-ups, including intelligent voicemail detection, thereby boosting sales pipeline efficiency and conversion rates.

B2B Sales, Marketing, Lead GenerationFor: Sales Development Representatives, Marketing Teams, Sales Operations

Streamlining Appointment Scheduling and Confirmations

Many businesses spend considerable time manually scheduling and confirming appointments, leading to administrative overhead and potential no-shows. With Retell AI, organizations can automate the entire appointment management process via conversational AI agents, handling scheduling, rescheduling, and confirmation calls to improve operational efficiency and reduce missed appointments.

Healthcare, Professional Services, Retail, Automotive, EducationFor: Office Managers, Operations Teams, Scheduling Coordinators

Proactive Customer Engagement and Automated Feedback Collection

Gathering timely and comprehensive customer feedback often yields low response rates through traditional survey methods, and proactive customer outreach for updates or confirmations can be labor-intensive. Retell AI empowers companies to use voice agents for outbound calls to conduct integrated NPS and CSAT surveys, deliver important announcements, and provide personalized follow-ups, significantly increasing engagement and data collection efficiency.

Customer Success, Market Research, Retail, E-commerceFor: Customer Success Managers, Marketing Analysts, Product Managers

Frequently asked questions

Retell AI is a comprehensive, no-code platform for building, testing, deploying, and monitoring AI-powered voice agents that can handle phone calls naturally. The platform enables businesses to create conversational AI agents that can answer questions, schedule appointments, resolve administrative issues, and collect customer feedback—all without requiring extensive coding.

Retell AI uses advanced language models (like GPT-4o and GPT-4.1) to power voice agents that can engage in natural, human-like conversations. The platform supports both inbound and outbound calls, integrates with various telephony providers like Twilio, and offers real-time conversational performance with sub-second latency across speech recognition, reasoning, and voice synthesis.

Retell AI agents can perform a wide range of tasks including customer support, where they answer FAQs, reset passwords, verify transactions, and address account questions. They also handle appointment scheduling by automatically scheduling and confirming appointments. Furthermore, they engage prospects and qualify leads through lead qualification and follow-ups. For feedback collection, agents can embed NPS and CSAT questions directly within live calls, achieving 5-7 times higher completion rates than traditional surveys. Voicemail detection allows them to detect voicemail and leave pre-recorded or dynamically generated messages. Finally, they facilitate warm transfers by handing conversations to human agents with full context preserved.

No. Retell AI is designed as a no-code platform with an intuitive UI that allows non-programmers to build and deploy voice agents. You can define behavior through a simple interface by writing high-level goals and selecting conditions or actions without writing extensive code.

Retell AI's knowledge base allows agents to automatically access and reference business information to provide accurate answers. The knowledge base can be populated through multiple input methods and automatically syncs with webpages, documents, and custom content, ensuring customers always receive up-to-date information without manual retraining. You don't need to change your agent's prompt to use the knowledge base—it integrates seamlessly.

You can create your first phone agent in approximately 5 minutes. The basic setup involves creating a new agent in the Retell dashboard, configuring basic parameters such as voice selection, response speed, and integration endpoints, connecting your knowledge base or FAQ system, and setting up custom actions and integration points as needed.

Retell AI offers extensive integration capabilities including telephony providers like Twilio and other providers for making and receiving calls, seamless integration with CRM systems, scheduling tools such as calendar and appointment systems, support for custom APIs including GET, POST, PUT, PATCH, and DELETE requests, webhooks for custom workflows and data handling, and the Model Context Protocol (MCP) for advanced integrations with external databases.

Yes. Retell AI agents can make and receive phone calls, handling concurrent outbound calls for use cases like appointment confirmations, lead follow-ups, customer surveys, and voicemail detection.

Retell AI's agents are fine-tuned on millions of real customer conversations and can handle interruptions, nuanced language, and maintain context across multiple conversation turns. The platform uses advanced models like GPT-4o that enable dynamic conversation flows without requiring extensive prompt engineering or hardcoded logic.

Yes. Retell AI includes an enterprise dashboard that provides insights on call success rates, latency, sentiment analysis, and customer satisfaction metrics, enabling teams to optimize continuously.

Retell AI welcomes feedback, feature requests, and help inquiries through their support channels and community forums to help you succeed with the platform.

Tags

support automationnatural language processingappointment bookinglead qualificationvoice api

Specifications

Deployment
Browser
API
Target Audience
Startup
Business
Enterprise
Complexity
Developer

Pricing

Pay as you go

Per monthly

Free
  • Self-Serve
  • Start instantly
  • $0.07+/minute for AI Voice Agents
  • $0.002+/msg for AI Chat Agents
  • Pre-build Functions
  • Simulation Testing
  • Analytics
  • $10 Free credits
  • 20 Free concurrent calls
  • 10 Free Knowledge Bases
  • Discord and Email support

Enterprise Plan

Per monthly

Contact sales
  • Includes all features from the Pay as you go plan
  • Optional White-Glove Service
  • Discounted pricing based on volumes
  • Fully managed agent setup
  • Additional Included concurrency
  • Early access to beta features
  • Higher Limit on Knowledge Bases
  • Custom concurrent calls based on volumes
  • Premium private Slack channel support with dedicated support teams

✓ Free trial • ✓ Free plan • ✓ Enterprise options

Integrations

CRM
telephony
automation platform
database
Twilio

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