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Amazon Polly vs Azure AI Speech Studio: catalog facts
Amazon Polly	Azure AI Speech Studio
Paid Pay-as-you-go AWS pricing, with an AWS Free Tier allowance.	Paid Usage is billed through Azure AI Speech.
Web	Web
Many voices across dozens of languages Neural and generative voice engines	No-code interface for Azure speech services Custom neural voice creation
Requires an AWS account and billing setup Built for developers integrating an API rather than casual use	Requires an Azure account and subscription Aimed at developers rather than casual users
Hosted service	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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