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Speech Engine

API service

by ElevenLabs

A service that adds speech recognition and speech synthesis to chat agents while the developer supplies the LLM logic.

Find alternatives to Speech Engine

What it does

• Speech to text
• Text to speech
• Voice agent

Features 7

• Turn detectionKnows when a user has finished speaking versus pausing, controlling when the transcript goes to your LLM.
• Interruption handlingMonitors user speech while the agent is talking and stops playback instantly when the user cuts in.
• Voice activity detectionFilters speech from background noise at the input level so only clean audio reaches transcription.
• Audio orchestrationManages the full voice lifecycle from capturing user audio to delivering the agent's spoken response.
• Server SDKAttach Speech Engine to your server, receive transcripts, pass them to your LLM and send the response back.
• Client SDKStart a conversation session from the browser or mobile app in three lines.
• ElevenLabs UIPre-built UI components such as agent orbs, waveforms and chat widgets.

Sources

Pricing

Pricing page · 15 Oct 2026

"Burst pricing (per minute)"

Description

Official documentation · 15 Oct 2026

"ElevenLabs Speech Engine adds voice capabilities to any chat agent."

What it does

Official documentation · 15 Oct 2026

"ElevenLabs handles speech-to-text and text-to-speech"

Sold within

Official documentation · 15 Oct 2026

"Speech Engine is for developers who want to bring their own LLM"

Name

Official documentation · 15 Oct 2026

"Speech Engine integrates on top of your existing stack."

URL

Official documentation · 15 Oct 2026

"Speech Engine integrates on top of your existing stack."

Deployment

Official documentation · 15 Oct 2026

"Speech Engine connects your server to ElevenLabs over WebSocket."

Interfaces

Official documentation · 18 Oct 2026

Page: 'Server SDK Attach Speech Engine to your server'.

Intended for

Official documentation · 18 Oct 2026

Page: 'Our platform is designed for deployments at scale with enterprise-level data protections'.

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