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Amazon Polly vs. Google Cloud Text-to-Speech

The best way to compare Amazon Polly vs. Google Cloud Text-to-Speech: audio samples, features, plans, pricing, and more.

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Non-Fiction
Fiction
News
Blog
Conversation
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Filesize
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Text to speech API - Amazon Polly

Amazon Polly

Text-to-speech service to transform text into natural-sounding speech using deep learning technologies.
Text to speech API - Google Cloud Text-to-Speech

Google Cloud Text-to-Speech

Allows developers to create natural-sounding, synthetic human speech as playable audio.

Voice Quality

Mean Opinion Score
Fiction
3.00
Non-Fiction
2.51
Conversation
2.63
Mean Opinion Score
Fiction
3.93
Non-Fiction
3.82
Conversation
3.42
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.
  • Based on the Mean Opinion Scores provided, Google Cloud Text-to-Speech generally offers higher voice quality across fiction, non-fiction, and conversation categories compared to Amazon Polly.
  • Google Cloud's service achieves particularly notable superiority in fiction and non-fiction voice quality.
  • This suggests that for applications requiring more natural-sounding speech, Google Cloud Text-to-Speech might be the preferable choice.

Features

Voice Cloning
Multi-lingual
Per-word Timestamps
Pitch Control
Speed Control
Phone Formats (e.g. pcm_mulaw)
Voice Cloning
Multi-lingual
Per-word Timestamps
Pitch Control
Speed Control
Phone Formats (e.g. pcm_mulaw)
  • Both Amazon Polly and Google Cloud Text-to-Speech offer a range of features to customize and enhance the text-to-speech experience, including multi-lingual support, pitch and speed control, and support for various phone formats.
  • However, Google Cloud Text-to-Speech distinguishes itself with the addition of voice cloning capabilities, a feature not available in Amazon Polly.
  • Conversely, Amazon Polly offers per-word timestamps, a feature absent in Google Cloud Text-to-Speech, potentially making it more suitable for applications requiring precise synchronization between text and speech.

Pricing & Plans

Free
$0/mo
1M characters (for first 12 months only)
Pay As You Go
$16per
1M characters
Free
$0/mo
1M characters
Pay As You Go
$16per
1M characters
  • In the first 12 months, both Amazon Polly and Google Cloud Text-to-Speech offer comparable value with their free plans, providing a generous allowance for users to explore their services.
  • Beyond the initial year, Google Cloud Text-to-Speech potentially edges out Amazon Polly by offering a free tier that appears to extend indefinitely, making it a more attractive option for long-term use.
  • For users exceeding the free tier or after the first year, both services are priced equally, making them competitive choices for those focusing solely on cost.

Summary

  • In comparing Amazon Polly and Google Cloud Text-to-Speech, Google Cloud emerges as the superior option in terms of voice quality, particularly for fiction and non-fiction content, and offers unique features like voice cloning.
  • While both services provide competitive pricing and a range of customization options, Amazon Polly's exclusive feature of per-word timestamps may appeal to specific use cases requiring detailed synchronization.
  • Overall, Google Cloud Text-to-Speech presents a more compelling choice for users prioritizing natural-sounding speech and long-term value, though Amazon Polly remains a strong contender for projects with specific technical requirements.

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