Azure Voice Live APIMicrosoft
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Related Products
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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.
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About
Gradium is a voice AI platform for developers and organizations building speech-enabled applications and conversational agents. Its hosted APIs provide streaming text-to-speech, speech-to-text, speech translation, and speech-to-speech, with WebSocket and REST interfaces, real-time turn detection, pronunciation controls, and voice design or cloning features. A browser-based studio lets users try the models and manage voices, while documentation and SDK guides support application development. Use cases include voice agents, customer-service automation, live transcription, multilingual voice experiences, and spoken content generation. Gradium also publishes Phonon, an open-weight text-to-speech model designed for local, offline use in applications and on-device systems. Plans use credits for speech generation, transcription, and translation.
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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
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Developers seeking to build low-latency conversational voice agents with real-time speech recognition, synthesis, and bidirectional interaction
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Audience
Developers and organizations building voice-enabled applications, conversational agents, and speech workflows, including enterprise teams.
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Supported
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API
Offers API
Supported
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Screenshots and Videos |
Screenshots and VideosNo images available
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Pricing
No information available.
Free Version
Not Supported
Free Trial
Not Supported
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Pricing
$0/month
The free tier includes 45,000 credits. The XS plan is $13/month and includes 225,000 credits. Credits are shared across speech services; monthly plan credits do not roll over. Annual billing saves one month.
Free Version
Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationMicrosoft
Founded: 1975
United States
learn.microsoft.com/en-us/azure/ai-services/speech-service/voice-live
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Company InformationGradium
Founded: 2025
France
gradium.ai/
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Alternatives |
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Categories |
Categories |
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Integrations
Eden AI
Not Supported
GPT-4.1
Supported
GPT-4o
Supported
GPT-5
Supported
LiveKit
Not Supported
MAI-Voice-2-Flash
Supported
Microsoft Azure
Supported
Phi-4
Supported
Pipecat
Not Supported
gpt-realtime
Supported
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Integrations
Eden AI
Supported
GPT-4.1
Not Supported
GPT-4o
Not Supported
GPT-5
Not Supported
LiveKit
Supported
MAI-Voice-2-Flash
Not Supported
Microsoft Azure
Not Supported
Phi-4
Not Supported
Pipecat
Supported
gpt-realtime
Not Supported
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