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Speechmatics vs Amazon Polly: catalog facts
Speechmatics	Amazon Polly
Best for: Developers adding speech recognition to voice agents or transcription products	Best for: Developers adding speech output to applications on AWS
Free + paid options A free start is offered, with paid usage and enterprise plans through sales.	Paid Pay-as-you-go AWS pricing, with an AWS Free Tier allowance.
Web	Web
Real-time and batch transcription in many languages Speaker diarization and identification All 4 strengths for Speechmatics Real-time and batch transcription in many languages Speaker diarization and identification Cloud, on-premises and on-device deployment options Integrations with LiveKit, Pipecat, Vapi and Zapier	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
Built mainly for developers working with an API On-premises and enterprise options require contacting sales	Requires an AWS account and billing setup Built for developers integrating an API rather than casual use
Hosted service	Hosted service
Not open source	Not open source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Sources for Speechmatics speechmatics.com Catalog checked October 2, 2026	Official website Full listing and sources Sources for Amazon Polly aws.amazon.com/polly Catalog checked October 2, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.