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Verdict

A quick read before you dig into the full page.

Best if
Platform to build, test, deploy, and monitor AI voice agents
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You need a free plan with no credit card
Pick this when
Platform to build, test, deploy, and monitor AI voice agents

Overview

Retell AI provides an API that enables developers to build human-like voice agents. It offers features to build, test, deploy, and monitor AI voice agents at scale, with integrations to various platforms and services.

Retell AI screenshot

Access & connections

Where you can use Retell AI.

Platforms

Web

Capabilities

What this tool accepts, produces, and is strongest at.

Highlights

  • Voice AI API
  • Agent Builder
  • Call Transfer
  • Appointment Booking
  • Knowledge Base Auto-Sync
  • IVR Navigation
  • Batch Calling
  • Verified Phone Numbers
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  • Branded Call ID
  • Post Call Analysis
  • Concurrent Calling
  • Voicemail Detection

FAQ 11

What is Retell AI?
Retell AI provides an API that enables developers to build human-like voice agents. It offers features to build, test, deploy, and monitor AI voice agents at scale, with integrations to various platforms and services.
How to use Retell AI?
Utilize the voice AI API and agent builder to create custom voice AI agents. Test agents with built-in test LLM features. Deploy agents to phone calls, web calls, SMS, and more. Monitor performance through a call history dashboard.
How do I create an AI Voice Agent with Retell AI?
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.
What is the pricing for Retell AI?
Retell offers a pay-as-you-go model starting at $0.07 per minute with no platform fees or subscription-based pricing—you only pay for what you use. Rates may change based on different voice and LLM configurations. For enterprise solutions Retell offers competitive reduced rates, custom concurrent call options, and premium support.
Can I connect the agent to my existing phone number?
Yes, you can! Retell supports integration with any telephony system through SIP trunking, making it easy to connect your existing phone number.
What resources does my company need to use Retell AI?
You’ll need one engineer to integrate Retell AI with your systems and create a voice AI agent. The initial setup typically takes anywhere from a few hours to a few days. Once the agent is set up, ongoing maintenance can be handled by a product manager or similar team member.
Can Retell AI Handle Multiple Calls at Once?
Yes! Retell AI supports concurrent calling, meaning your AI phone agent can handle multiple conversations simultaneously. While our agents can handle an unlimited amount of concurrent calls, this capability varies by plan, with pay-as-you-go users allocated to a quota of 20 concurrent calls. Plans can be easily upgraded to match your call concurrency needs.
Can Retell AI handle voicemail detection?
Yes! Retell AI can detect voicemail responses and either hang up or leave a pre-recorded or dynamically generated message, ensuring efficient outreach and follow-ups.
How do you calculate the minutes?
Each call rounds up to the nearest second, and the time is accumulated. At the end of the month, we will charge you based on the total time.
If someone is not talking during the call, will you still charge the fee?
Yes, we calculate the entire length of the call because the speech-to-text module continues to operate throughout.
How can I download the invoice and add company details?
You can see the invoice after you paid the billing circle in the billing tab. Make sure you've added the company information before getting billed.
Retell AI
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