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TELNYX VOICE AI

Design a custom voice for your brand in minutes

Design a fresh voice from a prompt, clone your own voice from audio, or dub an existing voice into another language. Then ship it across AI Assistants, Call Control, and TTS.

Design a voiceExplore Text-to-Speech
A brand voice prompt generating a custom voice named Aria in seconds on Telnyx Voice Design Lab
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WHY VOICE DESIGN

Your voice, your brand, every surface

Stock voices sound like everyone else. Voice Design lets you create one that sounds like you, then use it everywhere Telnyx handles speech.

FEATURES

Built for control, not just generation

Voice Design gives you the tools to create, refine, and ship a voice that is exclusively yours.

  • Minutes to a custom voice

    From a text description to a production-ready voice in under a minute. Brand-fit voice creation at the speed of a prompt.

  • Iterate until it sounds right

    Generate as many samples as you need. Refine the description, try again. You commit only when the voice lands.

  • Quality that fits the use case

    Default for speed, Ultra for flagship content, Minimax for longer source recordings. Match the model to the job.

  • A voice exclusive to your product

    A designed or cloned voice serves only your product. Your IVR, your agents, your TTS, all sounding like you.

  • Voice infrastructure included

    Create, store, and deploy from the same platform that carries your calls and runs your agents. Your voice lives where your speech happens.

  • Built for live voice

    Voice Design outputs work in real-time AI Assistants, Call Control, and the TTS WebSocket. The voice is ready for live conversation, batch synthesis, and everything between.

HOW IT WORKS

From idea to production voice

Design a voice from a text prompt or clone one from audio, then use it across AI Assistants, Call Control, and the TTS WebSocket.

EXPLORE DEV DOCS
# Step 1: Design a voice from a text prompt
curl -X POST "https://api.telnyx.com/v2/voice_designs" \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Friendly Receptionist",
    "prompt": "Female, mid-thirties. Warm and full, slightly husky.",
    "text": "Hello, thank you for calling. How can I help you today?",
    "language": "en",
    "provider": "telnyx"
  }'

# Step 2: Save the design as a usable voice clone
curl -X POST "https://api.telnyx.com/v2/voice_clones" \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Friendly Receptionist",
    "voice_design_id": "DESIGN_ID",
    "version": 1,
    "language": "en",
    "gender": "female"
  }'
PRODUCTS

Your entire voice stack on one platform

One account, one API, one bill.

See all products
  • Inference

    Inference

    Run frontier open-source models on GPUs we own.

    Learn more
  • Voice AI Agents

    Voice AI Agents

    Build and deploy low-latency voice AI agents.

    Learn more
  • Telnyx Text-to-Speech API

    Text-to-Speech

    Use your custom voices in production through the TTS API and WebSocket.

    Learn more
  • Call Control

    Call Control

    Programmable voice for calls, IVRs, and SIP trunks.

    Learn more

Build a voice worth listening to.

Create a Telnyx account, design or clone your first voice, and ship it into production today.

Design a voiceTALK TO US

FAQ

Voice Design is the Telnyx tool for creating custom voices. Design a new voice from a prompt, clone an existing voice from audio, or dub a voice into another language. Then use it across AI Assistants, Call Control, and the TTS WebSocket.