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Microsoft Azure AI Speech vs. Amazon Polly

The best way to compare Microsoft Azure AI Speech vs. Amazon Polly: audio samples, features, plans, pricing, and more.

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Live Demo

Try our text-to-speech API. Click a button to generate random text:

Non-Fiction
Fiction
News
Blog
Conversation
0/250
Voice
Format
Normal
Speed
Filesize
0 kb
Text to speech API - Microsoft Azure AI Speech

Microsoft Azure AI Speech

Enables your applications, tools, or devices to convert text into human-like synthesized speech.
Text to speech API - Amazon Polly

Amazon Polly

Text-to-speech service to transform text into natural-sounding speech using deep learning technologies.

Voice Quality

Microsoft Azure AI Speech Samples

Mean Opinion Score
Fiction
3.69
Non-Fiction
3.13
Conversation
3.18

Amazon Polly Samples

Mean Opinion Score
Fiction
3.00
Non-Fiction
2.51
Conversation
2.63
Mean Opinion Score (MOS) is a numerical measure that represents the perceived quality of audio samples, commonly used in evaluating text-to-speech systems. The score ranges from 1 to 5, with 1 indicating poor quality and 5 signifying excellent quality. These scores are derived from comprehensive, professionally-conducted evaluations, and are anonymized to ensure unbiased results.

Voice Quality - Conclusion

  • Based on the Mean Opinion Scores provided, Microsoft Azure AI Speech demonstrates superior voice quality across all categories (Fiction, Non-Fiction, and Conversation) compared to Amazon Polly.
  • Azure's scores are consistently higher, indicating a more human-like and pleasant listening experience.
  • This suggests that for applications where voice quality is a critical factor, Microsoft Azure AI Speech might be the preferable choice.

Features

Microsoft Azure AI Speech Features

Voice Cloning
Multi-lingual
Per-word Timestamps
Pitch Control
Speed Control
Phone Formats (e.g. pcm_mulaw)

Amazon Polly Features

Voice Cloning
Multi-lingual
Per-word Timestamps
Pitch Control
Speed Control
Phone Formats (e.g. pcm_mulaw)

Features - Conclusion

  • Both Microsoft Azure AI Speech and Amazon Polly offer a range of features that cater to the customization and flexibility needs of text-to-speech applications, including multi-lingual support, per-word timestamps, pitch control, speed control, and support for phone formats.
  • However, Microsoft Azure AI Speech distinguishes itself with the addition of voice cloning, a feature not available in Amazon Polly.
  • This could offer a significant advantage for applications requiring a higher degree of personalization or specific voice replication.

Pricing & Plans

Microsoft Azure AI Speech Pricing

Free
$0/mo
5 hours of audio (~225K chars)
Pay As You Go
$15per
1M characters

Amazon Polly Pricing

Free
$0/mo
1M characters (for first 12 months only)
Pay As You Go
$16per
1M characters

Pricing & Plans - Conclusion

  • In a direct comparison of pay-as-you-go plans, Microsoft Azure AI Speech offers a more cost-effective solution at $15 per million characters, slightly undercutting Amazon Polly's rate of $16 per million characters.
  • This pricing advantage makes Microsoft Azure AI Speech the more economical choice for users looking to process large volumes of text into speech.
  • However, users should consider their specific needs and the overall value each service provides beyond just the cost.

Customer Reviews

Microsoft Azure AI Speech Reviews

4.2 out of 5
Average of 88 ratings from leading review sites.
Customers appreciate Azure Text to Speech API for its ease of use, high-quality audio output, and seamless integration with other services. They find it particularly beneficial for accessibility and enhancing user experience across various applications. However, concerns about the cost and limited customization options are frequently mentioned. The API's multilingual support and continuous updates are praised, but some users desire improvements in voice naturalness and additional language options.
Ease of use
Integration
Accessibility
Audio quality
Multilingual support
Naturalness of voice
Cost
Customization

Amazon Polly Reviews

4.4 out of 5
Average of 68 ratings from leading review sites.
Customers appreciate Amazon Polly for its natural-sounding voices, ease of use, and integration with AWS services. They find it beneficial for various applications like IVR systems, content creation, and multilingual support. However, concerns about cost, limited customization options, and occasional unnatural inflections in the voices are common. The service's scalability and fast response times are highlighted as significant advantages, helping businesses efficiently manage large-scale projects.
Ease of use
Natural-sounding voices
Integration with AWS
Scalability
Voice inflection
Cost
Customization options

Compare Alternatives

Microsoft Azure AI Speech Alternatives

Microsoft Azure AI Speech vs. Unreal Speech
Microsoft Azure AI Speech vs. ElevenLabs
Microsoft Azure AI Speech vs. Play.ht
Microsoft Azure AI Speech vs. Google Cloud Text-to-Speech
Microsoft Azure AI Speech vs. OpenAI Text-to-Speech
Microsoft Azure AI Speech vs. Murf API
Microsoft Azure AI Speech vs. Neets.ai
Microsoft Azure AI Speech vs. IBM Watson
Microsoft Azure AI Speech vs. Resemble.AI
Microsoft Azure AI Speech vs. LOVO AI
Microsoft Azure AI Speech vs. Deepgram Aura

Amazon Polly Alternatives

Amazon Polly vs. Unreal Speech
Amazon Polly vs. ElevenLabs
Amazon Polly vs. Play.ht
Amazon Polly vs. Google Cloud Text-to-Speech
Amazon Polly vs. OpenAI Text-to-Speech
Amazon Polly vs. Murf API
Amazon Polly vs. Neets.ai
Amazon Polly vs. IBM Watson
Amazon Polly vs. Resemble.AI
Amazon Polly vs. LOVO AI
Amazon Polly vs. Deepgram Aura

Summary

  • In summary, Microsoft Azure AI Speech outperforms Amazon Polly in terms of voice quality, offering a more human-like and pleasant listening experience across various categories.
  • It also provides a slightly more cost-effective solution for pay-as-you-go plans and distinguishes itself with unique features such as voice cloning.
  • These advantages make Microsoft Azure AI Speech a preferable choice for users seeking high-quality, customizable, and economically efficient text-to-speech services.

Looking for a better alternative to Microsoft Azure AI Speech & Amazon Polly?

Try Unreal Speech! You get 250,000 free characters every month.

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