Amazon Polly

Amazon Polly is a cloud service from AWS that turns text into lifelike speech using advanced deep learning technologies. It offers both standard and Neural TTS voices, with the latter providing superior naturalness. As an AWS service, it is highly scalable, reliable, and cost-effective for high-volume applications. It provides fine-grained control via SSML and custom lexicons.

Primarily targeted at developers and businesses already within the AWS ecosystem, it powers applications like news readers, chatbots, and accessibility tools. Its rank is based on its robustness, seamless integration with other cloud services, and competitive pricing for scalable, enterprise-grade deployments.