> ## Documentation Index
> Fetch the complete documentation index at: https://www.bolna.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Text-to-speech providers

> See every text-to-speech provider you can use as a Bolna agent voice, and open the setup guide for each.

The synthesizer turns the agent's reply into speech. Pick a voice per language on the agent's **Languages** tab, or set it in the `synthesizer` block of the agent config. Each provider below has its own guide with models, configuration and troubleshooting.

Not sure which to choose? [Choose providers](/docs/concepts/choosing-providers) compares them by language, latency and cost. To use your own account with a provider, see [Connect provider credentials](/docs/providers).

<CardGroup cols={2}>
  <Card title="AWS Polly" href="/docs/aws-polly">
    Learn how to integrate and use AWS Polly TTS with Bolna Voice AI agents including Amazon's neural, generative and standard models.
  </Card>

  <Card title="Azure" href="/docs/azure-voice">
    Integrate Microsoft Azure Text-to-Speech with Bolna to create natural, expressive Voice AI agents. Supports neural voices and multilingual output.
  </Card>

  <Card title="Cartesia" href="/docs/cartesia">
    Enable Cartesia voices in Bolna Voice AI agents for expressive, customizable AI voices using their latest voice models for multilingual Indian voices.
  </Card>

  <Card title="Deepgram" href="/docs/deepgram-voice">
    Integrate and use your Bolna Voice AI agents with high-quality neural voices from Deepgram for natural, human-like conversational experiences.
  </Card>

  <Card title="ElevenLabs" href="/docs/elevenlabs-voice">
    Configure ElevenLabs text-to-speech in Bolna voice agents, including Turbo v2.5, Flash v2.5, Eleven v3 and Eleven v4 Turbo: models, voices, streaming, and cloning.
  </Card>

  <Card title="Kalpa Labs" href="/docs/kalpa">
    Configure Kalpa Labs text-to-speech in Bolna voice agents: models, voices, code-switched Hinglish, streaming, and telephony audio.
  </Card>

  <Card title="Maya" href="/docs/maya">
    Configure Maya Research's Maya 2 Native text-to-speech in Bolna voice agents: voices, supported languages, mid-call language switching, and audio.
  </Card>

  <Card title="Rime" href="/docs/rime">
    Integrate Rime TTS with Bolna Voice AI agents for ultra-fast, expressive speech synthesis with sub-200ms latency and diverse conversational voice options.
  </Card>

  <Card title="Sarvam" href="/docs/sarvam-voice">
    Integrate and use your Bolna Voice AI agents with high-quality neural voices from Sarvam's Bulbul models for natural, human-like Indian-language speech.
  </Card>

  <Card title="Smallest" href="/docs/smallest-voice">
    Integrate and use Smallest voices with Bolna Voice AI agents for lightweight and efficient text-to-speech solutions.
  </Card>

  <Card title="Soniox" href="/docs/soniox-voice">
    Integrate Soniox real-time TTS with your Bolna Voice AI agents for low-latency streaming speech across 63 languages, named voices, and voice cloning.
  </Card>
</CardGroup>


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