1. [Home](https://www.g2.com/) 2. ... 3. [Generative AI Software](https://www.g2.com/categories/generative-ai) 4. [Text to Speech Software](https://www.g2.com/categories/text-to-speech) 5. [Polly](https://www.g2.com/products/amazon-polly/reviews) 6. [Polly Claims vs Evidence](https://www.g2.com/products/amazon-polly/claims-vs-evidence) # Amazon Polly Claims vs Evidence This page compares marketing claims that Amazon Polly makes on its own website with what real G2 users say in their reviews. Each claim's source link points to the page where it appeared. Claims are rated as follows: Supported when a clear majority of the reviewers who address it back it up, Disputed when a clear majority contradict it, and Mixed when reviewers are divided. Reviews that don't mention a claim are not counted. Last updated Sep 30, 2026 ## Claim: “Use custom lexicons to modify the pronunciation of acronyms, company names, internal terminology, or any other words you choose.” Supported by reviews. Relevant reviewers report that Amazon Polly allows users to provide pronunciations for incorrectly pronounced words and fine-tune pronunciation through SSML, supporting the claimed pronunciation-customization capability. - “Sometimes words are not pronounced perfect so we have to give it the pronunciation” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12703449) - “the SSML markup allows fine-tuning pronunciation and speech patterns.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-11728238) Source: [https://aws.amazon.com/polly/](https://aws.amazon.com/polly/) ## Claim: “Amazon Polly’s Speech Synthesis Markup Languages (SSML) tags also allow you to adjust emphasis, intonation, phrasing, and style.” Supported by reviews. Relevant reviewers describe SSML as enabling fine-tuning of speech patterns and mention tags for prosody and pauses, supporting the claimed adjustment capabilities. One reviewer notes occasional processing errors when combining tags, but this does not contradict the reported functionality. - “the SSML markup allows fine-tuning pronunciation and speech patterns” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-11728238) - “Integrating multiple SSML tags for prosody and pauses occasionally triggers processing errors in Amazon Polly.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-13056166) Source: [https://aws.amazon.com/polly/](https://aws.amazon.com/polly/) ## Claim: “Amazon Polly offers 100+ male and female voices in 40+ language and language variants.” Mixed support from reviews. Reviewers report multiple voice options and support for many languages, but others describe the available voices as limited and request wider variety. The reviews do not establish the specific quantities of 100+ voices or 40+ language and language variants. - “There are multiple voice options available, and it supports many languages that we can use.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-13058272) - “The limited voices, and lacks natural voice.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12840402) - “Having a wider variety of voices would provide more flexibility when creating different types of educational and awareness content.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12927337) Source: [https://aws.amazon.com/polly/](https://aws.amazon.com/polly/) ## Claim: “Polly provides dozens of lifelike voices across a broad set of languages for you to build speech-activated applications that engage and convert.” Mixed support from reviews. Reviewers report lifelike voices and support for many languages, while others describe limited voices and restricted availability across engines or regions; the reviews do not establish the claimed breadth of “dozens” or that Polly engages and converts. - “It delivers high-quality, lifelike voices powered by Neural Text-to-Speech (NTTS). There are multiple voice options available, and it supports many languages that we can use.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-13058272) - “The limited voices, and lacks natural voice.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12840402) - “Different voices are available, but not every voice supports every engine or region.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12927337) Source: [https://aws.amazon.com/polly/](https://aws.amazon.com/polly/) ## Claim: “When requesting Amazon Polly output, you can choose from dozens of lifelike voices and various languages.” Mixed support from reviews. Reviewers commonly describe Amazon Polly as providing lifelike or natural-sounding voices, multiple voice options, and support for many languages. However, some reviewers report limited voice availability and regional or engine restrictions, and the reviews do not establish the specific magnitude of “dozens” of voices. - “It delivers high-quality, lifelike voices powered by Neural Text-to-Speech (NTTS). There are multiple voice options available, and it supports many languages that we can use.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-13058272) - “The limited voices, and lacks natural voice.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12840402) - “Different voices are available, but not every voice supports every engine or region.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12927337) Source: [https://aws.amazon.com/polly/](https://aws.amazon.com/polly/) ## Claim: “Amazon Polly is a fully-managed service that generates voice on demand, converting any text to an audio stream.” Supported by reviews. Relevant reviewers consistently report that Amazon Polly converts text into speech or voice narration quickly and through integrations, supporting the claim's core functionality. The reviews do not independently establish every part of the wording, such as converting any text specifically into an audio stream. - “I like that Amazon Polly turns text into natural-sounding speech quickly and reliably.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-13036408) - “It provides affordable and fast text to speech service, and easy integration to different apps though api.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12840402) - “Polly helps me convert written content into clear voice narration without spending extra time recording everything manually.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12927337) Source: [https://aws.amazon.com/polly/](https://aws.amazon.com/polly/) ## Claim: “This AI voice generator creates synthetic speech that is assertive, emotionally engaged, and highly colloquial, similar to a real human voice.” Mixed support from reviews. Reviewers often describe Polly's voices as natural, human-like, or lifelike, while others report that the voices lack naturalness or expressiveness. The reviews do not specifically establish the claimed assertive, emotionally engaged, and highly colloquial qualities, so the evidence is mixed. - “The best thing that I found about polly was , the human like text-to-audio conversion” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12998022) - “It delivers high-quality, lifelike voices powered by Neural Text-to-Speech (NTTS).” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-13058272) - “One area for improvement is making the voices sound even more natural and expressive in longer conversations.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-13036408) - “The limited voices, and lacks natural voice.” [Read Full Review](https://www.g2.com/products/amazon-polly/reviews/amazon-polly-review-12840402) Source: [https://aws.amazon.com/polly/](https://aws.amazon.com/polly/)