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Cartesia vs Amazon Polly: catalog facts
Cartesia	Amazon Polly
Paid Plans are listed on the pricing page, with a sales contact for larger deployments.	Paid Pay-as-you-go AWS pricing, with an AWS Free Tier allowance.
Web	Web
One API covers text-to-speech, transcription and voice agents Built for low-latency, real-time conversation	Many voices across dozens of languages Neural and generative voice engines
Mainly an API for developers rather than a consumer app Cloud only, with no local option	Requires an AWS account and billing setup Built for developers integrating an API rather than casual use
Hosted service	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 September 26, 2026	Official website Full listing and sources Checked October 2, 2026

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