Retell AI

Builds scalable AI voice agents for phone calls and customer interactions

Retell AI is a platform for building, testing, deploying, and monitoring AI voice agents designed for phone calls and customer interactions. It provides a voice AI API that enables natural conversations with 500ms latency and supports over 18 languages for global dialing. The agent builder allows custom creation of voice agents using intuitive tools and integrations with CRMs and telephony systems.

Testing features include built-in LLM simulations to handle edge cases and ensure agent performance. Deployment options cover phone calls, web calls, SMS, and chat interfaces. The monitoring dashboard tracks success rates, latency, user sentiment, and call history to identify issues quickly.

Retell AI maintains compliance with SOC 2 Type 1 and 2, HIPAA, and GDPR standards. It offers scalability for millions of concurrent calls with 99.99% uptime and fallback mechanisms for reliability. Integrations connect to any CRM, automation platform, or database.

Competitors include Vapi for developer-focused prototypes and Bland AI for outbound sales emphasis. Retell AI provides pay-as-you-go pricing with enterprise discounts, generally lower than bundled plans from rivals like Synthflow.

Users appreciate the human-like voice quality and ease of scaling, though some note a developer-oriented interface. For implementation, begin with the live demo, then use documentation to configure a basic agent and monitor initial deployments for optimization.

Homepage Screenshot 📸

Video Overview 🎬

What are the key features? ✨

Voice AI API: Enables natural, empathetic conversations with 500ms latency using advanced models.
Agent Builder: Intuitive tool for creating custom voice agents without extensive coding.
Testing Suite: Built-in LLM features simulate edge cases for robust agent performance.
Deployment Options: Supports phone, web calls, SMS, and chat for flexible rollout.
Monitoring Dashboard: Tracks success rates, latency, and sentiment to refine agents.

Who is it for? 🤔

Retell AI suits businesses in customer service, sales, healthcare, and logistics that need to automate high-volume calls while maintaining compliance and scalability, especially teams with some technical know-how who want to reduce manual handling and boost efficiency without overhauling their tech stack.

Examples of what you can use it for 💡

Sales Manager: Automates outbound calls to qualify leads and book appointments directly into CRM.
Customer Support Lead: Handles inbound queries with empathetic responses, escalating complex issues seamlessly.
Healthcare Admin: Manages patient scheduling and reminders in multiple languages while ensuring HIPAA compliance.
Logistics Coordinator: Routes delivery inquiries and updates via voice agents to cut wait times.
Global Marketer: Deploys multilingual agents for international campaigns to engage diverse audiences.

Pros & Cons ⚖️

Low latency chats
Scales to millions
Multilingual support
Easy integrations

Dev-heavy setup
Cost stacking

FAQs 💬

How do I create an AI voice agent with Retell AI?

Use the intuitive agent builder or API to define prompts, workflows, and integrations, then test before deploying.

What pricing model does Retell AI use?

It offers pay-as-you-go starting low per minute, with enterprise plans providing volume discounts for high usage.

Can I connect agents to my existing phone number?

Yes, integrate with Twilio or other telephony providers to use your current numbers seamlessly.

What resources are needed to use Retell AI?

Basic developer knowledge helps, but the platform includes docs and support for quicker onboarding.

Does Retell AI handle multiple calls simultaneously?

It supports scalable concurrent calls, up to millions with proper enterprise setup.

Can it detect and handle voicemails?

Yes, built-in detection routes voicemails appropriately or transcribes them for follow-up.

Is Retell AI compliant for sensitive industries?

It meets SOC 2, HIPAA, and GDPR standards for secure operations.

How does multilingual support work?

Agents handle 18+ languages with natural accents and can dial internationally.

What integrations are available?

Connects to CRMs, databases, and automation tools like Zapier for extended functionality.

How reliable is the platform uptime?

Averages 99.99% with fallback options to ensure calls complete without interruption.

Ready to try Retell AI?