---
title: "Retell AI, Custom-code · Voice-agent platform · Agent Fieldbook"
url: https://agentfieldbook.org/catalog/agents/retell/
description: "Voice-agent building blocks, real-time conversational agents for customer support + sales calls."
section: "Catalogue · Agents · infra"
source: Agent Fieldbook — generated from the published page
---

# Retell AI

**Custom-code · Voice-agent platform · Confirmed**

Voice-agent building blocks, real-time conversational agents for customer support + sales calls.

Verified against [retellai.com](https://www.retellai.com/)· 2026-07-08

- [retellai.com](https://www.retellai.com/)

## Spec sheet

| Field | Value |
| --- | --- |
| Foundation | Multi-model + custom pipeline |
| Topology | sequential |
| Type | agent |
| Deployment | cloud |
| Interface | chat· api |
| Context | Model-dependent |
| Pricing | Per-minute usage |
| Tools | Telephony + LLM providers |
| Orchestration | Real-time voice pipeline |
| Country | US |
| Verified | 2026-07-08 |

## Sources

## Verified against

- [https://www.retellai.com/](https://www.retellai.com/)

The corpus does not rewrite vendor documentation. Where copy is quoted verbatim it is marked as such and attributed to its source.