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About

Azure Voice Live API is a fully managed solution for building low-latency, high-quality speech-to-speech agents through one unified interface. It combines speech recognition, generative AI, and text-to-speech, allowing developers to send audio input and receive audio output, synchronized avatar visuals, and action triggers without manually orchestrating separate backend components or deploying the underlying models. It supports more than 140 speech-to-text locales and over 600 standard voices across 150+ text-to-speech locales, with options for phrase lists, custom speech, custom voices, and brand-aligned avatars. Developers can choose among multiple generative AI models, including GPT-Realtime, GPT-5, GPT-4.1, GPT-4o, Phi, and compatible bring-your-own models, depending on the intelligence, speed, and latency required. Advanced conversational features include noise suppression, echo cancellation, robust interruption detection, and end-of-turn detection.

About

The OpenAI Realtime API is a newly introduced API, announced in 2024, that allows developers to create applications that facilitate real-time, low-latency interactions, such as speech-to-speech conversations. This API is designed for use cases like customer support agents, AI voice assistants, and language learning apps. Unlike previous implementations that required multiple models for speech recognition and text-to-speech conversion, the Realtime API handles these processes seamlessly in one call, enabling applications to handle voice interactions much faster and with more natural flow.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers seeking to build low-latency conversational voice agents with real-time speech recognition, synthesis, and bidirectional interaction

Audience

AI developers

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Microsoft
Founded: 1975
United States
learn.microsoft.com/en-us/azure/ai-services/speech-service/voice-live

Company Information

OpenAI
Founded: 2015
United States
openai.com

Alternatives

Alternatives

Amazon Lex

Amazon Lex

Amazon
Veritone Voice

Veritone Voice

Veritone

Categories

Text to Speech Supported

Categories

Integrations

GPT-4o Supported
AccessOwl Not Supported
ChatGPT Not Supported
GPT-4.1 Supported
GPT-5 Supported
MAI-Voice-2-Flash Supported
Microsoft Azure Supported
OpenAI Not Supported
Phi-4 Supported
SmartCallz Not Supported
XLeap Not Supported
gpt-realtime Supported

Integrations

GPT-4o Supported
AccessOwl Supported
ChatGPT Supported
GPT-4.1 Not Supported
GPT-5 Not Supported
MAI-Voice-2-Flash Not Supported
Microsoft Azure Not Supported
OpenAI Supported
Phi-4 Not Supported
SmartCallz Supported
XLeap Supported
gpt-realtime Not Supported
Claim Azure Voice Live API and update features and information
Claim Azure Voice Live API and update features and information
Claim OpenAI Realtime API and update features and information
Claim OpenAI Realtime API and update features and information