Compare Azure AI Speech

Details side-by-side comparison of Azure AI Speech against top competitors.

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Azure AI Speech

Text-to-speech in Microsoft's Azure AI Speech service, with standard, HD and custom voices

TTSAPICloud
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Podcastle (now Async)

AI audio and video suite with text to speech, now operating as Async

TTSPodcastVoice Cloning
Pricing
Model
Pay-as-you-go, per character
Freemium / Subscription
Starting Price
Not stated on the page we checked
Not stated on the page we checked
Has Free Version
Plan Summary
Free (F0) Neural: 0.5 million characters a monthPaid rates per 1M characters: dollar amounts not stated on the page we checked
Free: 10 AI credits and about 15 min text to speech, lifetimeEssentials: 450 credits and about 2 hours a monthPro: 1,200 credits and about 10 hours a monthTeams: 3,000 credits and about 40 hours a monthBusiness custom
Other Specifications
Product Type
Text-to-SpeechAPI
Text-to-SpeechVoice CloningAI Video and Audio Editor
Language Support
Languages Supported
100+ languages and locales (standard voices, Microsoft Learn)
over 15 languages (pricing page); '15 different languages' and 'over 100 languages and dialects tested' on the AI voices page
Accent Variety
-
Not stated on the page we checked
Voice Quality
Quality Rating
Not stated on the page we checked
Not stated on the page we checked
Tonal Description
Standard neural voices, HD voices, custom and personal voices
Vendor describes natural pronunciation; no quality claim is made here.
Voice Count
Total Voices
Not stated on the page we checked
1000+ (vendor figure)
Categories
Standard neural, HD, custom, personal
Stock AI voices plus voice cloning
Ease of Use
Usability Rating
Developer-oriented (SDK, REST)
Not stated on the page we checked
User Experience
Audio Content Creation tool in Speech Studio for no-code use
Chat-based AI editor
Integrations
API Availability
Yes, Speech SDK, REST API and batch synthesis API
Developer Voice API announced under the Async brand; per-plan access not stated on the page we checked.
Platform Integrations
N/A
Not stated on the page we checked
Use Cases
Primary Use Cases
Chatbots and voice assistantsAudiobooksIn-car navigation
PodcastsYouTube videosPodcast adsMarketing
Applications
As listed on Microsoft Learn
Monetized YouTube content, podcast ads and marketing, per the vendor FAQ.
Text to Speech Features
SSML Support
Not stated on the page we checked
API Access
Multi Language
Emotional Impulse
N/A
Not stated on the page we checked
Voice Cloning
Character/Word Limits
Plan Limits
Per-character billing; Chinese characters count as two
Text to speech allowances per plan: ~15 min lifetime (Free), ~2 h, ~10 h, ~40 h a month on paid plans
Monthly Limit
Free (F0) Neural: 0.5 million characters a month
~15 minutes lifetime (Free)
Commercial Rights
Included
N/A
Licensing Terms
Not stated on the page we checked
Vendor FAQ: you retain ownership of the output. Per-plan commercial rights not stated on the page we checked.
File Formats
Supported Formats
N/A
MP3WAV (paid plans)
Export Options
Formats not stated on the page we checked; models available at 24 kHz and 48 kHz
Audio: MP3 up to 160kbps on Free, 320kbps MP3 or 1411kbps WAV on paid plans
Customer Support
Support Channels
N/A
Not stated on the page we checked
Priority Support
N/A
Not stated on the page we checked

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