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Kokoro-FastAPI vs Amazon Polly: catalog facts
Kokoro-FastAPI	Amazon Polly
Best for: Self-hosting a fast text-to-speech back end for apps, readers or Home Assistant	Best for: Developers adding speech output to applications on AWS
Free Free and open source under the Apache 2.0 licence.	Paid Pay-as-you-go AWS pricing, with an AWS Free Tier allowance.
macOS, Linux, Self-hosted	Web
OpenAI-compatible speech endpoint Prebuilt multi-architecture Docker images with models included All 4 strengths for Kokoro-FastAPI OpenAI-compatible speech endpoint Prebuilt multi-architecture Docker images with models included Caption timestamps and phoneme endpoints Voice mixing and SSML support	Many voices across dozens of languages Neural and generative voice engines All 3 strengths for Amazon Polly Many voices across dozens of languages Neural and generative voice engines SSML support for fine control of speech
AMD GPU support is experimental Apple Silicon has no prebuilt image	Requires an AWS account and billing setup Built for developers integrating an API rather than casual use
Self-hosted	Hosted service
Open source	Not open source
License: Apache-2.0	License not stated
No account needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Sources for Kokoro-FastAPI github.com/remsky/Kokoro-FastAPI Catalog checked September 26, 2026	Official website Full listing and sources Sources for Amazon Polly aws.amazon.com/polly Catalog checked October 2, 2026

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