Telnyx Text-to-Speech

Real-time text-to-speech API with voices from Telnyx, third-party providers and custom models.

Tool type: Text-to-speech API with multi-provider voices
Made for: Developers and teams building voice applications
Runs on: Telnyx REST API, WebSocket, and Voice API/TeXML call flows; Called from your application or used within Telnyx call flows; not an end-user app.
Last checked: 29 Oct 2026; 3 product sources

What it does

Telnyx Text-to-Speech takes text plus a voice ID and returns generated speech over REST, WebSocket streaming, or directly inside a Telnyx call flow. It brings together Telnyx-hosted voices, supported third-party providers such as AWS Polly, Azure Speech, ElevenLabs and xAI Grok, and custom voices created in Voice Design Lab, all behind one API.

Developers typically call the REST endpoint with an API key and a voice ID, or play speech inside Voice API and TeXML flows for IVR and voice agent use. Distinct features include switching providers through configuration rather than separate integrations, pronunciation dictionaries, SSML and emotion markers for supported providers, and voice cloning or dubbing workflows. The REST API can also be used with OpenAI-compatible client patterns.

This suits teams building voice agents, contact center or IVR experiences, and apps that need several voice options behind one interface. Access requires a Telnyx account and API key, and the first step is signing up. Some controls depend on the chosen provider, and model-by-model rates should be confirmed on the Telnyx pricing page before committing to a voice.

What it can do

Generate speech from text over a REST API using a voice ID
Stream audio chunks over WebSocket for real-time responses
Play generated TTS inside Voice API and TeXML call flows
Choose among Telnyx-native, third-party and custom voices through one API
Tune pronunciation with dictionaries and use SSML or emotion markers where the provider supports them
Create custom voices and use voice cloning or dubbing workflows

Works with

AWS Polly
Azure Speech
ElevenLabs
MiniMax
MurfAI
Resemble AI
Inworld
Qwen3TTS
Fish Audio
xAI Grok TTS

Before you choose

Feature availability such as SSML and emotion control depends on the selected provider.
Rates vary by model, so confirm the per-model rate for your chosen voice on the Telnyx pricing page.
Telnyx-run models keep processing on Telnyx infrastructure; third-party providers are relayed through Telnyx.

Listed under

Coding

Get started

Then send a POST to the text-to-speech endpoint with a voice ID.

Create a Telnyx account at the sign-up page and generate an API key.
Choose a voice ID from the available Telnyx, provider or custom voices.
Send a POST request to https://api.telnyx.com/v2/text-to-speech with the text and voice in the request body.

Plans and prices

Prices in USD

Usage-based, billed per 1 million characters, starting at $3 for Telnyx TTS, with no seat fees or annual commits. Pricing varies by model, and volume discounts are available for larger deployments.

Pay-as-you-go TTS$3 per 1 million charactersStarting rate; varies by model.

No seat fees
No annual commit
Volume discounts for larger deployments

Source: telnyx.com/products/text-to-speech-api, checked 29 Oct 2026. Prices can change; check before you buy.

Sources for this overview

Product pages, documentation, and pricing checked 29 Oct 2026. Each source supports part of the overview; availability and prices can change.

Real-time Text-to-Speech API | Telnyx ↗telnyx.com
Telnyx Developer Docs - Telnyx ↗developers.telnyx.com
Infrastructure for realtime agents | Telnyx ↗telnyx.com

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Where this comes from

How we research

Company website: telnyx.com: product, pricing and policy pages
Social accounts: Accounts the company links, and its posts on X
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Last checked 29 Oct 2026. Every field keeps its source and date; unknown means we couldn’t confirm it.