Retell AI

Retell AI is a Voice Agent Infrastructure company founded in 2023 and based in San Francisco, United States. It has raised $4.6M in total funding, most recently a Seed in 2024.

Retell AI provides APIs and SDKs for building conversational voice agents with sub-800ms latency and built-in telephony support. Used by hundreds of companies for outbound sales, appointment setting, and customer support; raised seed funding in 2024.

Retell AI is the fastest-growing voice-agent infrastructure platform among enterprise users, competing directly with Vapi and Bland.

retellai.com Voice Agent Infrastructure

United Statesprivate

At a glance

Total raised

$4.6M

last round seed

Headcount

11-50

approximate · public range

Headquarters

San Francisco

United States

Founded

2023

3 years active

Status

Private

Voice Agent Infrastructure

Subsector

Funding history

Total raised

$4.6M

Rounds tracked

Latest stage

Seed

Date	Stage	Amount	Valuation	Lead investors
Apr 1, 2024	Seed	$4.6M	—	Alt Capital

Retell AI

At a glance

Funding history

In the news

Voice AI Startup Retell AI Launches Conductor, Featuring

Voice AI Startup Retell AI Launches Conductor, Featuring the First-Ever Graph-Native Review Interface for Production Voice Agents

Voice AI Startup Retell AI Earns No. 1 Spot on San

Watch

Leadership

Products

Voice Agent API

Visual Call Flow Builder

Retell Chat Agent

Open roles

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