# Amazon Polly vs. OpenAI Text-to-Speech The best way to compare Amazon Polly vs. OpenAI Text-to-Speech: audio samples, features, plans, pricing, and more. # Live Demo Non-Fiction Fiction News Blog Conversation 0/250 Voice Sierra Autumn Melody Hannah Emily Ivy Kaitlyn Luna Willow Lauren Sierra Noah Jasper Caleb Ronan Ethan Daniel Zane Rowan Language ๐Ÿ‡บ๐Ÿ‡ธ US English ๐Ÿ‡บ๐Ÿ‡ธ US English ๐Ÿ‡ฌ๐Ÿ‡ง UK English ๐Ÿ‡จ๐Ÿ‡ณ Mandarin Chinese ๐Ÿ‡ฎ๐Ÿ‡ณ Hindi ๐Ÿ‡ช๐Ÿ‡ธ Spanish ๐Ÿ‡ง๐Ÿ‡ท Portuguese ๐Ÿ‡ฏ๐Ÿ‡ต Japanese ๐Ÿ‡ซ๐Ÿ‡ท French ๐Ÿ‡ฎ๐Ÿ‡น Italian Format Standard Standard MP3 Phone Call PCM ยต-law Normal Speed 1.0 Pitch Bitrate 192k 192k 128k 96k 64k 48k 32k 16k _Synthesize_ Speed 0 s Filesize 0 kb ## [Amazon Polly](https://aws.amazon.com/polly/) Text-to-speech service to transform text into natural-sounding speech using deep learning technologies. ## [OpenAI Text-to-Speech](https://platform.openai.com/docs/guides/text-to-speech) Convert text into lifelike spoken audio using one of the six built-in voices. ### Voice Quality #### Amazon Polly Samples Mean Opinion Score Fiction 3.00 Non-Fiction 2.51 Conversation 2.63 #### OpenAI Text-to-Speech Samples Mean Opinion Score Fiction N/A Non-Fiction N/A Conversation N/A Mean Opinion Score (MOS) is a numerical measure that represents the perceived quality of audio samples, commonly used in evaluating text-to-speech systems. The score ranges from 1 to 5, with 1 indicating poor quality and 5 signifying excellent quality. These scores are derived from comprehensive, professionally-conducted evaluations, and are anonymized to ensure unbiased results. ### Features #### Amazon Polly Features Voice Cloning Multi-lingual Per-word Timestamps Pitch Control Speed Control Phone Formats (e.g. pcm_mulaw) #### OpenAI Text-to-Speech Features Voice Cloning Multi-lingual Per-word Timestamps Pitch Control Speed Control Phone Formats (e.g. pcm_mulaw) #### Features - Conclusion - **Amazon Polly** offers a more feature-rich text-to-speech service compared to **OpenAI Text-to-Speech**, including capabilities such as voice cloning, per-word timestamps, pitch control, speed control, and support for phone formats. - **OpenAI Text-to-Speech**, on the other hand, has a more limited feature set, lacking in these advanced options. - This makes **Amazon Polly** a more versatile choice for users needing detailed customization and control over their text-to-speech outputs. ### Pricing & Plans #### Amazon Polly Pricing Free $0/mo 1M characters (for first 12 months only) Pay As You Go $16per 1M characters #### OpenAI Text-to-Speech Pricing Pay As You Go $15per 1M characters Optimized for speed Pay As You Go (TTS HD) $30per 1M characters Optimized for quality #### Pricing & Plans - Conclusion - **Amazon Polly** offers an attractive starting point for new users with its free tier for the first 12 months, making it ideal for those testing the waters or with minimal text-to-speech needs. - However, for long-term or high-volume users, **OpenAI Text-to-Speech** edges out as the more cost-effective option, lacking a free tier but maintaining a slightly lower ongoing cost. - Ultimately, the choice between the two services hinges on the user's specific needs and usage patterns, with **Amazon Polly** favoring initial use and **OpenAI Text-to-Speech** benefiting sustained, heavier use. ### Summary - In comparing **Amazon Polly** and **OpenAI Text-to-Speech**, **Amazon Polly** stands out with its richer feature set, including voice customization options and a free tier for new users, making it particularly appealing for those seeking detailed control and cost-effective entry points. - However, **OpenAI Text-to-Speech** offers a slightly more affordable long-term pricing model, despite its more limited features and lack of voice quality data. - Ultimately, the choice between the two depends on the user's priorities, whether they value advanced features and initial cost savings with **Amazon Polly** or prefer the slightly lower ongoing costs associated with **OpenAI Text-to-Speech**.