Microsoft Azure Neural TTS
Enterprise-grade neural text-to-speech with 500+ lifelike voices in 140+ languages
Founded
2018
Starting Price
Free
Category
Developer Tools
Last updated March 8, 2026
About Microsoft Azure Neural TTS
Microsoft Azure Neural TTS is a cloud-based text-to-speech service that uses deep neural networks to produce natural, human-like speech. Part of Azure AI Speech (now under Azure Foundry Tools), it offers over 500 neural voices across 140+ languages and dialects, with advanced SSML controls for pitch, rate, pauses, and speaking styles. It supports real-time synthesis, batch processing for long-form audio, and custom neural voice creation for brand-specific applications.
Pros & Cons
Pros
- Extremely wide language and voice coverage with 500+ voices across 140+ languages
- Natural, human-like speech quality with deep neural network models and emotion support
- Comprehensive SSML controls for fine-grained customization of speech output
- Generous free tier with 0.5 million characters per month for testing and small projects
- Enterprise-grade reliability backed by Microsoft Azure infrastructure and SLA
Key Features
500+ Neural Voices
Access over 500 lifelike neural voices across 140+ languages and dialects with natural intonation and expression
SSML Customization
Fine-tune speech output with Speech Synthesis Markup Language to control pitch, rate, volume, pauses, pronunciation, and speaking styles
Real-Time Synthesis
Low-latency text-to-speech conversion via the Speech SDK or REST API for live applications and interactive experiences
Batch Synthesis API
Asynchronously convert large volumes of text to audio files, ideal for audiobooks and long-form content over 10 minutes
Custom Neural Voice
Create a unique, brand-specific neural voice using your own training data for distinctive conversational AI experiences
HD V2 Voices
Premium high-definition voices with context-aware emotion detection for enhanced naturalness and expressiveness
Voice Live API
Real-time speech synthesis for interactive scenarios like chatbots, voice assistants, and live customer interactions
Pricing
Free (F0)
Free
- 0.5 million characters per month
- Neural Text to Speech
- Standard voices included
- 5 million characters storage
Neural TTS
$16/1M characters
Best For
Voice Assistants & Chatbots
Add natural, expressive speech to conversational AI applications with real-time synthesis and style control
Audiobook & Content Narration
Convert large volumes of text into professional-quality audio using batch synthesis and multiple voice options
Accessibility Solutions
Enable screen readers, read-aloud features, and assistive technologies with clear, natural-sounding speech
IVR & Contact Centers
Power interactive voice response systems with natural-sounding prompts and dynamic customer interactions
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