ElevenLabs

ElevenLabs provides highly realistic AI voices with advanced prosody and natural speech patterns, delivering lifelike audio synthesis with emotional nuance and conversational flow.

Paid plan required

You need a paid ElevenLabs plan for reliable TTS integration.

ElevenLabs may restrict or disable free-tier accounts due to abuse-detection mechanisms, even if free credits are available. To avoid missing audio responses during testing and production, ensure you use a paid plan.

The following example shows a starting tts parameter configuration you can use when you Start a conversational AI agent.

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"tts": {

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"vendor": "elevenlabs",

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"params": {

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"base_url": "wss://api.elevenlabs.io/v1",

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"key": "<your_elevenlabs_key>",

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"model_id": "eleven_flash_v2_5",

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"voice_id": "pNInz6obpgDQGcFmaJgB",

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"sample_rate": 24000

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}

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}

paramsrequired

• base_url stringrequired

  The endpoint URL for the OpenAI TTS service. See Data residency.

• key stringrequired

  The API key used for authentication. Get your API key from the ElevenLabs Console.

• model_id stringrequired

  Identifier of the model to be used. Popular options include eleven_flash_v2_5 for speed or eleven_multilingual_v2 for quality.

• voice_id stringrequired

  The identifier for the selected voice for speech synthesis. Browse available voices in the Voice Library.

• sample_rate numbernullable

  Default: 24000

  Audio sampling rate in Hz. Common values: 16000, 22050, 24000, 44100.

• speed numbernullable

  Default: 1.0

  Speed up or slow down the speed of the generated speech. Range 0.7 to 1.2 inclusive.

• stability numbernullable

  Controls voice stability. Higher values (0.8-1.0) produce more consistent speech, lower values (0.0-0.5) add more variation.

• similarity_boost numbernullable

  Enhances similarity to the original voice. Range: 0.0-1.0. Higher values stick closer to the training voice.

• style numbernullable

  Controls speaking style and expressiveness. Higher values increase emotional range and variation.

• use_speaker_boost booleannullable

  Improves voice quality and similarity when enabled. Recommended for most use cases.

For advanced configuration options, voice cloning, and detailed parameter descriptions, see the ElevenLabs TTS documentation.