Retell AI

Low-latency voice agents for phone and web: interruption, barge-in, and a latency story aimed at sounding live — Bland's more conversational-engineering cousin.

Product preview

Overview

Retell is the voice stack for people who measured the silence: barge-in, interruption, a latency number they will quote. Bland is campaign minutes; Vapi is the platform; Retell sells the live-sounding conversation.

It will still pause. Humans hang up on pauses. The product is shrinking that pause. For a support or sales line that must feel like a person picked up, it is on the shortlist. For batch outbound that can sound like a robot, cheaper minutes win.

Pros / Cons

Pros

Latency as a first-class feature
Barge-in that makes it feel live
Phone plus web in one voice stack
Engineering dashboard, not only a script UI

Cons

Still pauses, humans still hang up
More expensive than batch outbound minutes
Overlaps Vapi and Bland — pick a stack

Who it's for

Live-sounding support on a phone line

Web voice widgets that can be interrupted

Sales lines that cannot sound batched

Measuring and shrinking voice latency

Bottom line

Low-latency voice as the product — pick it when sounding live matters more than cheap minutes.

Key Features

Low-latency voice with barge-in

Phone and web voice agents

LLM plus telephony plumbing

Latency dashboard

Usage-based API

Compare Retell AI with alternatives

Retell AI vs ChatGPT Retell AI vs Claude Retell AI vs Gemini 4 products · Conversational AI

Frequently asked questions

What is Retell AI?

Retell AI is a Conversational AI tool developed by Retell AI. The company was founded in 2023 and is headquartered in San Francisco, USA. Low-latency voice agents for phone and web: interruption, barge-in, and a latency story aimed at sounding live — Bland's more conversational-engineering cousin.