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Retell AI

A voice-agent platform for customer calls and operational workflows.

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Company model
Software company
Category
Customer support & operations
Headquarters
San Francisco, California, United States
Team size
50 (YC-listed team)
Stage
Seed
Retell AI — official company image

Retell AI is a voice-agent platform for customer calls and operational workflows.

What Retell AI does

Retell AI is a platform for building and operating voice agents for business phone calls. Teams use it for reception, appointment setting, customer service, qualification, dispatch and collections, with tools for both inbound calls and outbound campaigns.

A visual builder combines conversation logic with knowledge bases, functions, transfers, DTMF and integrations. Agents can check availability, book appointments and retrieve information from connected systems. Deployments can use phone numbers, web experiences, SMS and batch calling.

Testing includes simulated scenarios and regression tests based on production calls. Post-call analysis and quality-assurance tools measure outcomes and identify failures for operators to address. Customers can build directly or work with a certified solution partner; voice pricing varies with the selected model, voice and optional features.

  • Voice agents
  • Customer service
  • Appointment booking
  • Call handling
  • Human handoff
  • Business integrations

Pricing

Published plans and engagement options.

Voice agents
$0.07–$0.31/min
Pay-as-you-go rate varies by model, voice and selected features. Telephony and optional additions affect the configuration.
Chat agents
From $0.002/message
Usage-based chat pricing.
Enterprise
Custom
Deployment, scale and support arrangements are scoped with sales.

Company details

Headquarters
San Francisco, California, United States
Founded
2023
Team size
50 (YC-listed team)
Stage
Seed
Funding
$4.6M Seed

Founders & leadership

Bing WuCEO
Zexia ZhangCTO
Evie WangPresident

Investors & backers

Retell AI reports a $4.6M seed round backed by Alt Capital and angel investors.

  • Alt Capital

News & interviews

Explore Retell AI

Retell AI is a platform for building and operating voice agents for business phone calls. Teams use it for reception, appointment setting, customer service, qualification, dispatch and collections, with tools for both inbound calls and outbound campaigns.

Visit Retell AI

Sources & profile notes

This profile brings together published information about Retell AI, including its offering, company details and supporting sources. Review the original material for the full context.

Last reviewed October 21, 2026. Prices and availability may change; inclusion is not an endorsement.