Amazon Polly vs eSpeak NG
On the evidence we track, Amazon Polly leads this comparison with a composite score of 60/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for text to speech. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Amazon Polly
LeaderAmazon Polly is a managed cloud service that synthesizes speech from text using neural networks and generative voice technology. It offers multiple voice options and languages, integrates through APIs, and supports various audio formats for use in applications and services.
eSpeak NG
A lightweight open source text-to-speech engine that converts written text into spoken audio using formant synthesis. Available as a command-line tool and C/library for integration across Linux, Windows, Android, and other platforms.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Amazon Polly
LeaderFrom $4.00 per 1M characters. Free tier available (5M characters/month for Standard voices).
- Standard Voices$4.00 per 1M characters
- Neural Voices$16.00 per 1M characters
- Long-Form Voices$100.00 per 1M characters
- Generative Voices$30.00 per 1M characters
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
Amazon Polly
Leader- Amazon Connect
- Amazon Chime SDK
eSpeak NG
- MBROLA
- SAPI5
- C API library integration
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.