***

id: 03c7b1e2-cd0f-4381-b72f-54d7c343372a
title: Voices and languages
sidebar-title: TTS
position: 1
slug: /voice/tts
author: 'Devon White, August Lindgren-Ruby'
x-custom:
tags:

* favorite
  description: Detailed list of all the TTS providers and voices SignalWire supports.

***

[polly]: /docs/platform/voice/tts/amazon-polly

[azure]: /docs/platform/voice/tts/azure

[cartesia]: /docs/platform/voice/tts/cartesia

[deepgram]: /docs/platform/voice/tts/deepgram

[elevenlabs]: /docs/platform/voice/tts/elevenlabs

[gcloud]: /docs/platform/voice/tts/gcloud

[openai]: /docs/platform/voice/tts/openai

[rime]: /docs/platform/voice/tts/rime

<Frame>
  ![A grid of logos for TTS providers on the SignalWire platform.](https://files.buildwithfern.com/signalwire.docs.buildwithfern.com/docs/97f5183cb2e1eed6f62e9e88712d281606677ef61d155d2cd68dd0084e42ddc7/assets/images/external/tts.webp)
</Frame>

SignalWire integrates natively with leading third-party text-to-speech (TTS) providers.
This guide describes supported engines, voices, and languages.
Refer to each provider's documentation for up-to-date model details and service information.

## Compare providers and models

SignalWire's TTS providers offer a wide range of voice engines optimized for various applications.
Select a provider, model, and voice according to the following considerations:

**Language support:**
At time of writing, engine language support is as follows.
Consult each provider's reference documentation for the most up-to-date information.

* [Rime][rime] voices support
  English, Spanish, French, German, and Hindi (Arcana model only).
* [Deepgram][deepgram] voices support
  English, Spanish, German, French, Dutch, Italian, and Japanese.
* [Amazon Polly][polly], [Azure][azure], [Cartesia][cartesia], and [Google Cloud][gcloud]
  offer a wide range of supported languages.
* All [ElevenLabs][elevenlabs] and [OpenAI][openai] voices are fully multilingual.

**SSML support:** Google Cloud and Amazon Polly support
SSML (Speech Synthesis Markup Language) as a string wrapped in `<speak>` tags.
Consult [Google Cloud's SSML docs](https://cloud.google.com/text-to-speech/docs/ssml) for details.
Refer to the Amazon Polly docs for more information on
[using SSML](https://docs.aws.amazon.com/polly/latest/dg/ssml.html)
and [supported SSML tags.](https://docs.aws.amazon.com/polly/latest/dg/supportedtags.html)

## Use voice identifier strings

Compose voice identifier strings using the following general format:

```
engine.voice:model
```

| Identifier                                               | Description                                             |
| -------------------------------------------------------- | ------------------------------------------------------- |
| `engine`<br /><span class="required-arg">required</span> | The TTS provider (e.g., `elevenlabs`, `rime`, `openai`) |
| `voice`<br /><span class="required-arg">required</span>  | The voice identifier (name or ID depending on engine)   |
| `model`<br /><span class="optional-arg">optional</span>  | Model variant (not all engines support this)            |

<Info>
  Since voice ID strings are case insensitive, the following strings are equivalent:

  ```
  gcloud.en-US-Neural2-A
  gcloud.en-us-neural2-a
  GCLOUD.EN-US-NEURAL2-A
  ```
</Info>

For detailed instructions for each provider, consult the voice ID references linked in the **Usage** column of the below table.

| TTS provider | Engine code  | Sample voice ID string                          | Usage                                                    |
| :----------- | :----------- | :---------------------------------------------- | -------------------------------------------------------- |
| Amazon Polly | `amazon`     | `amazon.Joanna-Neural`                          | [Reference](/docs/platform/voice/tts/amazon-polly#usage) |
| Azure        | `azure`      | `en-US-AvaNeural`                               | [Reference](/docs/platform/voice/tts/azure#usage)        |
| Cartesia     | `cartesia`   | `cartesia.a167e0f3-df7e-4d52-a9c3-f949145efdab` | [Reference](/docs/platform/voice/tts/cartesia#usage)     |
| Deepgram     | `deepgram`   | `deepgram.aura-asteria-en`                      | [Reference](/docs/platform/voice/tts/deepgram#usage)     |
| ElevenLabs   | `elevenlabs` | `elevenlabs.thomas`                             | [Reference](/docs/platform/voice/tts/elevenlabs#usage)   |
| Google Cloud | `gcloud`     | `gcloud.en-US-Casual-K`                         | [Reference](/docs/platform/voice/tts/gcloud#usage)       |
| OpenAI       | `openai`     | `openai.alloy`                                  | [Reference](/docs/platform/voice/tts/openai#usage)       |
| Rime         | `rime`       | `rime.luna:arcana`                              | [Reference](/docs/platform/voice/tts/rime#voices)        |

<br />

***

## **Pricing**

See the [Voice API Pricing](https://signalwire.com/pricing/voice) page for up-to-date pricing information.