Amazon Polly vs Microsoft Azure AI Speech

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

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Amazon Polly

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

Microsoft Azure AI Speech

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

Voice Quality

Amazon Polly Samples

Mean Opinion Score
Fiction
3.00
https://od.lk/s/NjBfMTI3MzMyNzU5Xw/arnold_rpg_dailouge.mp3
Non-Fiction
2.51
https://od.lk/s/NjBfMTI3MzMyNzI0Xw/clyde_site_sample.mp3
Conversation
2.63
https://od.lk/s/NjBfMTI3MzMyNzI0Xw/clyde_site_sample.mp3

Microsoft Azure AI Speech Samples

Mean Opinion Score
Fiction
3.69
Non-Fiction
3.13
Conversation
3.18

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 derivedfrom comprehensive, professionally-conducted evaluations, and are anonymized to ensure unbiased results.

Features

Amazon Polly Features

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

Microsoft Azure AI Speech Features

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

Features - Conclusion

  • Shared Features: Both Amazon Polly and Microsoft Azure AI Speech offer robust text-to-speech features including multi-lingual support, per-word timestamps, pitch, and speed control, suitable for a variety of applications.
  • Unique Azure AI Feature: Microsoft Azure AI Speech sets itself apart with voice cloning technology, a feature absent in Amazon Polly, enabling the creation of customized voice models that enhance personalized or branded audio projects.
  • Versatility and Application: The inclusion of voice cloning makes Azure AI Speech particularly versatile, ideal for users who require unique, tailored voice solutions for enhancing brand identity or user engagement.

Pricing & Plans

Amazon Polly Pricing

Free

$0 /mo

  • 1M characters (for first 12 months only)

Pay As You Go

$16 per

  • 1M characters

Microsoft Azure AI Speech Pricing

Free

$0/mo

  • 5 hours of audio (~225K chars)

Pay As You Go

$15/mo

  • 1M characters

Pricing & Plans - Conclusion

  • Pricing Comparison: Microsoft Azure AI Speech offers a more cost-effective rate at $15 per million characters, compared to Amazon Polly's $16 per million characters. This slight difference can add up, especially for users with substantial text-to-speech needs.
  • Cost-Effectiveness: The lower price point of Azure AI Speech makes it a marginally better value, particularly for those processing large volumes of text, where even small per-character cost savings become significant.
  • Consideration for Users: When selecting a text-to-speech service based solely on pricing, users should consider the cost difference between Azure AI Speech and Amazon Polly, especially if budget constraints are a major factor in their decision-making process.

Customer Reviews

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.

Dolore Impedit Eum Eos
Velit Voluptatem Eius Inventore

Microsoft Azure AI Speech Reviews

4.6 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.

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Summary

  • Voice Quality: Microsoft Azure AI Speech is recognized for its superior voice quality, providing more natural-sounding speech across various content types. This enhancement is crucial for applications where the realism and clarity of the voice are key to the user experience.
  • Pricing Advantage: Azure AI Speech also edges out Amazon Polly in terms of cost-effectiveness, offering a slightly more affordable rate at $15 per million characters compared to Polly's $16. This price difference, while small, can be significant for users with extensive text-to-speech needs.
  • Unique Features: Additionally, Azure AI Speech includes voice cloning technology, a standout feature that allows users to create custom voice models. This capability is particularly valuable for creating personalized user interactions or branded voice experiences.

TTS Property

Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.

Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.

TTS Property

-speaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy low latency websocket support and mult-speaker voice generation at pricing that helps you scale.


Our next-gen TTS model surpasses competitors on performance at onespeaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoyspeaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoyspeaker voice generation at pricing that helps you scale.Our next-gen TTS model surpasses competitors on performance at one-tenth the cost. Enjoy

Signal Noise Ratio

Signal Noise Ratio

Signal Noise Ratio

The signal-to-noise ratio (SNR) is a crucial metric that measures  the amount of useful information vs. false or irrelevant background noise, frequently measured in decibels (dB). Engineers aim to maximize SNR to enhance system performance by minimizing noise interference.

Do you offer any free credits for TTS & ASR?

drop-down

We offer a generous free plan for developers with one month of free:

  • 160 hours of text-to-speech generation
  • 1.2 million characters of speech-to-text transcription

What is the monthly subscription?

drop-down

Our monthly plan is $20 per month for

  • 160 hours of text-to-speech generation
  • 1.2 million characters of Speech-to-Text transcription

Once you exceed those limits, you can add $5 top-ups to your plan for

  • additional 30hrs of Text-to-Speech
  • additional 300,000 characters of Speech-to-Text

Do you offer voices & transcription other in languages?

drop-down

We currently only have English voice generation & transcription. But we're working on multilingual voice support, expected to roll out in 2-3 months.

Can I create custom voices (voice cloning)?

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Please contact us at founders@snr.audio with your custom voice (voice cloning) usecase. Once approved by our compliance team, you will get access to your custom voice in under 48-72 hours.

Can I use the generated audio & transcription commercially?

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Yes, audio & transcription generated with Signal Noise Labs can be used commercially. You own the license to the generated content to perpetuity.

How do I cancel my subscription?

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You can cancel your subscription at any time. Go to the Subscription panel in the dashboard and click the "Cancel Subscription" button.

app.snr.audio

SNR.Audio

SNR.Audio - Text to Speech and Speech to Text