What is the difference between Neural and Standard voices?

Standard voices use traditional concatenative synthesis, while Neural (NTTS) voices use deep learning to produce higher quality, more natural-sounding speech that better mimics human intonation.

Can I save and replay the audio generated by Amazon Polly?

Yes. Unlike many other services, Amazon Polly allows you to cache and replay generated speech as many times as you like without additional costs.

How does Amazon Polly handle specialized terminology?

You can use Custom Lexicons to specify exactly how certain words, such as company names or technical jargon, should be pronounced.

Does Amazon Polly support lip-syncing for avatars?

Yes, Polly provides 'Speech Marks' metadata that tracks when specific words or sounds are spoken, allowing you to synchronize animations or lip movements.

What audio formats does Amazon Polly support?

Polly can output speech in several formats, including MP3, Vorbis (Ogg), and raw PCM, with various sampling rates to balance quality and bandwidth.

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Text to speech

Freemium

Amazon Polly

Amazon Polly turns text into lifelike speech using deep learning, offering multiple voice styles and multi-language support for building speech-activated applications and accessibility tools.

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Rating

Reviews

Upvotes

3 months ago

Listed

Text to speech

AI Voice Generator

Accessibility

E-learning

Voice Cloning

Developer Tools

Cloud Computing

Natural Language Processing

Audio Synthesis

Tool information

Provider

Amazon Web Services (AWS)

Platforms

Web

API

AWS Management Console

Languages

English

Spanish

French

German

Italian

Japanese

Korean

Mandarin Chinese

Portuguese

Hindi

Arabic

Turkish

API Available

Yes

Added to directory

3 months ago

Last updated

about 1 month ago

Rating

Not available

Pricing

Freemium

About Amazon Polly

What the tool does and who it's for

Amazon Polly is a cloud-based service that uses advanced deep learning technologies to synthesize natural-sounding human speech from text. It offers a wide variety of lifelike voices across dozens of languages, allowing developers to build speech-activated applications like news readers, e-learning platforms, and accessibility tools. The service supports multiple speech engines—Standard, Neural, Long-Form, and Generative—each optimized for different use cases ranging from low-cost synthesis to high-fidelity, emotionally expressive narration. With features like Speech Synthesis Markup Language (SSML) support, speech marks for lip-syncing, and custom lexicons for pronunciation, Polly provides granular control over the generated audio.

Key capabilities

Lifelike Voices: A wide selection of natural-sounding male and female voices across numerous languages and accents.

Multiple Engines: Choose from Standard, Neural (NTTS), Long-Form, and Generative engines based on quality and cost needs.

SSML Support: Use Speech Synthesis Markup Language tags to control phrasing, emphasis, pitch, and speaking rate.

Speech Marks: Synchronize speech with facial animations or text highlighting using metadata for visemes and word boundaries.

Custom Lexicons: Modify the pronunciation of specific words, such as acronyms or industry-specific terminology.

Real-time Streaming: Synthesize and stream audio to applications with low latency for interactive use cases.

Brand Voice: Collaborate with AWS to create a unique, high-quality NTTS voice exclusive to your brand.

Newscaster Style: Optimized speaking style specifically for reading news articles and professional narrations.

Pricing

Freemium — plans below

AWS Free Tier

Standard voices: 5 million characters per month (first 12 months)
Neural voices: 1 million characters per month (first 12 months)
Long-Form voices: 500,000 characters per month (first 12 months)
Generative voices: 100,000 characters per month (first 12 months)

Standard Voices

$4.00

Price per 1 million characters
Unlimited storage of generated audio
Dozens of languages and voices
Pay-as-you-go

Neural Voices

Generative Voices

$30.00

Price per 1 million characters
Most expressive and realistic speech engine
Ideal for highly interactive or emotional content
Pay-as-you-go

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