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Amazon Polly vs Deepgram: catalog facts
Amazon Polly	Deepgram
Paid Pay-as-you-go AWS pricing, with an AWS Free Tier allowance.	Freemium Free sign-up for trying the APIs, with paid usage and enterprise plans.
Web	Web, Self-hosted
Many voices across dozens of languages Neural and generative voice engines	Speech-to-text, text-to-speech and voice agents from one provider Real-time streaming as well as batch transcription
Requires an AWS account and billing setup Built for developers integrating an API rather than casual use	Built for developers integrating an API, not a consumer app Usage beyond the free tier is paid
Hosted service	Self-hosted, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	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 October 1, 2026

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