> ## Documentation Index
> Fetch the complete documentation index at: https://koreai.mintlify.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Support for Third-Party ASR, TTS, and Voice Biometrics

## Automatic Speech Recognition (ASR)

We support the following third-party service providers for [ASR services](/ai-for-service/channels/voice-gateway/configure-voice-gateway#voice-preferences):

| Type   | ASR Provider                        | Deployment      | Languages                                                                                                     | Regions                                                                                            | Notes                                                                              |
| ------ | ----------------------------------- | --------------- | ------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------- |
| Native | Microsoft Azure Speech Services ASR | Cloud & On-Prem | [100+ languages/locales](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/language-support) | [Global Azure regions](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/regions) | Supports custom speech models and phrase lists for improving recognition accuracy. |
| Native | Google Cloud Speech-to-Text         | Cloud           | [125+ languages](https://docs.cloud.google.com/speech-to-text/docs/speech-to-text-supported-languages)        | [Global](https://docs.cloud.google.com/speech-to-text/docs/locations)                              | Supports automatic punctuation and speaker diarization features.                   |
| Native | Amazon Transcribe                   | Cloud           | [100+ languages/dialects](https://docs.aws.amazon.com/transcribe/latest/dg/supported-languages.html)          | [Global AWS regions](https://docs.aws.amazon.com/general/latest/gr/transcribe.html)                | Supports channel identification and domain-specific vocabularies.                  |
| Native | Deepgram                            | Cloud & On-Prem | [Multiple languages](https://developers.deepgram.com/docs/models-languages-overview)                          | Global                                                                                             | Low latency real-time transcription; custom model training supported.              |
| Native | OpenAI ASR                          | Cloud           | [100+ languages](https://github.com/openai/whisper/blob/main/whisper/tokenizer.py)                            | [Global](https://developers.openai.com/api/docs/supported-countries%5C)                            | Uses Whisper models for multilingual transcription and translation.                |
| Native | Amivoice ASR                        | Cloud           | [Japanese, English, Chinese, Korean](https://docs.amivoice.com/en/amivoice-api/manual/supported-languages)    | -                                                                                                  | -                                                                                  |
| Custom | Emotech ASR                         | Cloud           | -                                                                                                             | -                                                                                                  | -                                                                                  |
| Custom | RTZR ASR                            | Cloud           | -                                                                                                             | -                                                                                                  | -                                                                                  |

***

## Text to Speech (TTS)

We support the following third-party service providers for [TTS services](/ai-for-service/channels/voice-gateway/configure-voice-gateway#voice-preferences):

| Type   | TTS Provider                        | Deployment      | Languages                                                                                              | Regions                                                                                            | Notes                                                        |
| ------ | ----------------------------------- | --------------- | ------------------------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ |
| Native | Microsoft Azure Speech Services TTS | Cloud & On-Prem | [100+ languages](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/language-support)  | [Global Azure regions](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/regions) | Neural voices and custom neural voice training available.    |
| Native | Google Cloud Text-to-Speech         | Cloud           | [50+ languages](https://docs.cloud.google.com/text-to-speech/docs/list-voices-and-types)               | [Global](https://cloud.google.com/about/locations)                                                 | Includes WaveNet neural voices.                              |
| Native | Amazon Polly                        | Cloud           | [30+ languages](https://docs.aws.amazon.com/polly/latest/dg/supported-languages.html)                  | [Global AWS regions](https://docs.aws.amazon.com/general/latest/gr/Welcome.html)                   | Supports neural voices and SSML speech marks.                |
| Native | Deepgram TTS                        | Cloud & On-Prem | [Limited languages](https://developers.deepgram.com/docs/tts-models)                                   | Global                                                                                             | Real-time conversational TTS optimized for voice agents.     |
| Native | ElevenLabs                          | Cloud           | [30+ languages](https://elevenlabs.io/docs/overview/capabilities/text-to-speech#supported-languages)   | Global                                                                                             | Human-like voices with stability, speed, and style controls. |
| Native | OpenAI TTS                          | Cloud           | [Multiple languages](https://developers.openai.com/api/docs/guides/text-to-speech#supported-languages) | Global                                                                                             | Natural sounding voices with limited voice options.          |
| Native | NvIdia Riva                         | On-Prem         | [11+ languages](https://www.sarvam.ai/blogs/bulbul-v3)                                                 | -                                                                                                  | -                                                            |
| Custom | Sarvam TTS                          | -               | -                                                                                                      | -                                                                                                  | -                                                            |
| Custom | IST TTS                             | -               | -                                                                                                      | -                                                                                                  | -                                                            |
| Custom | Emotech TTS                         | -               | -                                                                                                      | -                                                                                                  | -                                                            |

***

## Voice Biometrics

We support the following third-party service providers for voice biometrics:

| Type   | Vendor  | Engine   | Deployment      | Notes                                            |
| ------ | ------- | -------- | --------------- | ------------------------------------------------ |
| Custom | ID R\&D | ID Voice | Cloud & On-Prem | Voice authentication and fraud detection engine. |

***