Retell AI

San Carlos, CaliforniaFounded 2023

1Tools Listed

Retell AI's mission is to help companies scale their call center operations using AI by providing a platform for building, deploying, and managing human-like AI voice agents.

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Founding Story

Founded by five ex-big-tech engineers (from Google, Meta, ByteDance) with the vision to replace traditional IVR systems and inefficient call centers with ultra-low latency, empathetic AI voice agents.

Discussions

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Leadership

Founders

Bing Wu

Co-founder and CEO. Former Product Manager at ByteDance. Background in engineering with an interest in the human brain and AI.

Zexia Zhang

Co-founder and CTO. Former engineer at Google specializing in speech and NLP (Natural Language Processing).

Todd Li

Co-founder and President. Serial entrepreneur and founder of several venture-backed startups.

Weijia Yu

Co-founder and COO. Former engineer/product specialist at Meta (Facebook).

Evie Wang

Co-founder and CMO. Background in design and marketing. Named to Inc. 2026 Female Founders 500 list.

Executive Team

Bing Wu

CEO

Ex-ByteDance PM, AI engineering background.

Zexia Zhang

CTO

Ex-Google speech/NLP expert.

Business Model

Revenue Model

Usage-based API and message fees (minutes/messages) plus monthly subscriptions for phone numbers, SMS, and concurrency.

Pricing Tiers

Free Tier

$10 free credits, 20 concurrent calls, 10 free knowledge bases.

Pay-as-you-go (Voice)

$0.07+/minute

Usage-based pricing for voice agents.

Pay-as-you-go (Chat)

$0.002+/message

Usage-based pricing for chat agents.

Enterprise

Custom

Lower per-minute rates (as low as $0.05), dedicated support, private Slack channel, and higher limits.

Private

Target Markets

Industries & Segments

BPOs
Enterprise Call Centers
SMEs
Healthcare
Financial Services
Insurance

Use Cases

Customer Support Automation
Lead Qualification
Appointment Scheduling
Debt Collection
Healthcare Patient Coordination
Logistics Dispatch

Notable Customers

Pine Park Health
Medical Data Systems
SWTCH

History & Milestones

January 2026

Upgraded platform for corporate call centers to deploy omni-channel agents; Revenue exceeded $40 million ARR.

December 2025

Announced the first automated QA solution for Voice AI to target human bottlenecks in agentic voice AI.

February 2024

Public launch on Hacker News and Product Hunt, gaining thousands of sign-ups.

August 2024

Secured $4.6 million Seed funding round led by Alt Capital.

Late 2024

Reached $15 million in Annual Recurring Revenue (ARR).

1 AI Tool by Retell AI

Retell AI

Voice Assistant

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.

Quick Facts

Headquarters

San Carlos, California

Founded

2023

Entity Type

Inc.

Employees

Investors

Alt Capital, Y Combinator

Office Locations

San Carlos

Latest News

January 29, 2026

Upgraded Retell AI Voice Platform Enables Corporate Call Centers to Deploy Infinite AI Agents; Revenue Exceeds $40M ARR

GlobeNewswire

February 2026

Retell AI Recognized in 2026 G2 Best Software Awards as Best Agentic AI Software

Retell AI Blog

December 17, 2025

Retell AI targets human bottlenecks in agentic voice AI with automated QA

SiliconANGLE

Key Capabilities

Ultra-low latency (<500ms)

Human-like turn-taking and interruption handling

Streaming RAG (Retrieval-Augmented Generation)

Real-time function calling

Omni-channel support (Voice, Chat, SMS, Email)

Automated AI Quality Assurance

Integrations & Partnerships

Platform Integrations

HubSpot

Twilio

Vonage

Go High Level

n8n

Zapier

Key Partnerships

OpenAI

Twilio

Telnyx

Connect

Website

retellai.com

X / Twitter

retellai

YouTube

@retellai

Discord

channels/1186424376300679209

AI Topics

Retell AI focuses on these topics:

Voice Assistant(1)

Conversational Agents(1)

Customer Communication(1)

Back to all developers

Retell AI

San Carlos, CaliforniaFounded 2023

1Tools Listed

Retell AI's mission is to help companies scale their call center operations using AI by providing a platform for building, deploying, and managing human-like AI voice agents.

Website View Tools View Discussions

Founding Story

Discussions

No discussions yet

Be the first to start a discussion about Retell AI

Leadership

Founders

Bing Wu

Co-founder and CEO. Former Product Manager at ByteDance. Background in engineering with an interest in the human brain and AI.

Zexia Zhang

Co-founder and CTO. Former engineer at Google specializing in speech and NLP (Natural Language Processing).

Todd Li

Co-founder and President. Serial entrepreneur and founder of several venture-backed startups.

Weijia Yu

Co-founder and COO. Former engineer/product specialist at Meta (Facebook).

Evie Wang

Co-founder and CMO. Background in design and marketing. Named to Inc. 2026 Female Founders 500 list.

Executive Team

Bing Wu

CEO

Ex-ByteDance PM, AI engineering background.

Zexia Zhang

CTO

Ex-Google speech/NLP expert.

Business Model

Revenue Model

Usage-based API and message fees (minutes/messages) plus monthly subscriptions for phone numbers, SMS, and concurrency.

Pricing Tiers

Free Tier

$10 free credits, 20 concurrent calls, 10 free knowledge bases.

Pay-as-you-go (Voice)

$0.07+/minute

Usage-based pricing for voice agents.

Pay-as-you-go (Chat)

$0.002+/message

Usage-based pricing for chat agents.

Enterprise

Custom

Lower per-minute rates (as low as $0.05), dedicated support, private Slack channel, and higher limits.

Private

Target Markets

Industries & Segments

BPOs
Enterprise Call Centers
SMEs
Healthcare
Financial Services
Insurance

Use Cases

Customer Support Automation
Lead Qualification
Appointment Scheduling
Debt Collection
Healthcare Patient Coordination
Logistics Dispatch

Notable Customers

Pine Park Health
Medical Data Systems
SWTCH

History & Milestones

January 2026

Upgraded platform for corporate call centers to deploy omni-channel agents; Revenue exceeded $40 million ARR.

December 2025

Announced the first automated QA solution for Voice AI to target human bottlenecks in agentic voice AI.

February 2024

Public launch on Hacker News and Product Hunt, gaining thousands of sign-ups.

August 2024

Secured $4.6 million Seed funding round led by Alt Capital.

Late 2024

Reached $15 million in Annual Recurring Revenue (ARR).

1 AI Tool by Retell AI

Retell AI

Voice Assistant

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.