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Amazon Polly vs Kokoro-FastAPI: catalog facts
Amazon Polly	Kokoro-FastAPI
Paid Pay-as-you-go AWS pricing, with an AWS Free Tier allowance.	Free Free and open source under the Apache 2.0 licence.
Web	macOS, Linux, Self-hosted
Many voices across dozens of languages Neural and generative voice engines	OpenAI-compatible speech endpoint Prebuilt multi-architecture Docker images with models included
Requires an AWS account and billing setup Built for developers integrating an API rather than casual use	AMD GPU support is experimental Apple Silicon has no prebuilt image
Hosted service	Self-hosted
Closed source	Open source
License not stated	License: Apache-2.0
Account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.