Summary of 5 Recommended Popular Text-to-Speech Software in English [Free, Paid, Commercial Use]
June 21, 2025
Hello, thank you for always using Ondoku.
Text-to-speech software is being increasingly utilized in various situations these days.
Text-to-speech software is very convenient to use and will likely become one of the essential technologies for our future lives.
Therefore, in this article, we will **introduce 5 recommended text-to-speech software programs popular in English-speaking countries**.
We will also introduce **whether these five text-to-speech software programs can be used for commercial purposes**.
Related Articles on Recommended Text-to-Speech Software for English Reading
This article provides a detailed explanation of text-to-speech software and web services recommended for reading English aloud.
Please take a look.
Recommended Text-to-Speech Software Popular in English-Speaking Countries
- Ondoku
- Amazon polly
- Natural Reader
- Watson
- oddcast
Ondoku
Ondoku is a text-to-speech software characterized by its simple, easy-to-understand pages and user-friendly UI.
Although I called it software, it is not a download version, but a SaaS that can be used on a website.
The pricing plans are clear and simple.
- Reading 5,000 characters/month: Free
- Reading 200,000 characters/month: 9.99 USD/month
- Reading 450,000 characters/month: 19.99 USD/month
- Reading 1,000,000 characters/month: 29.99 USD/month
As shown, you can start using it for free.
Even free members can download audio, and it is an easy-to-use service with a wide range of applications.
Features of Ondoku
- Commercial use possible even with free use
- Text-to-speech available for free
- Wide variety of speakers
- Reading can be done on the web
- Downloadable in mp3 format
- Easy-to-understand UI and good usability
- Supports not only English but also languages from 33 countries around the world
If you are unsure, we recommend trying Ondoku first!
Amazon Polly

Amazon Polly is a text-to-speech service from Amazon that started in December 2016.
With over 24 languages and 44 speakers available, it covers many languages.
By using the API, it can be integrated into various software and services.
However, without the technical skills to use an API, you cannot fully utilize the Amazon Polly service.
While you can listen to demo audio on the website, using the API is mandatory for reading any arbitrary text or integrating it into a service.
Features of Amazon Polly
- Commercial use possible
- API required
- Wide variety of speakers
- Supports not only English but also languages from 24 countries around the world
Natural Reader

Natural Reader Official Website
Natural Reader is a tool developed for people who have difficulty reading or who cannot read text due to disabilities.
It is a SaaS that can be used immediately on a web browser without any download required.
When using it,
- Personal use
- Commercial use
the available input screens differ between the two.
[Personal Use]
For free users, "Premium Voices" can be used for 20 minutes a day, and "Plus Voices" for only 5 minutes a day.
If you wish to use it more than this, a paid subscription is required.
[Commercial Use]
Free use is not available.
If you wish to use it, a paid subscription is required.
Features of Natural Reader
- Commercial use not allowed with a standard license
- Commercial use license available
- Wide variety of speakers
- Reading can be done on the web
- Downloadable in mp3 format (paid version only)
- Easy-to-understand UI and good usability
- Supports not only English but also more than 17 languages worldwide
Watson

Watson is a text-to-speech service developed and provided by IBM.
Like Amazon, the use of an API is required.
However, based on the terms of use, Watson cannot be used for commercial purposes. It seems to be limited to personal use only, so please be very careful when using it.
https://text-to-speech-demo.ng.bluemix.net/
Features of Watson
- Commercial use not possible
- API required
- Wide variety of speakers
oddcast

oddcast is a unique text-to-speech website.
It can read up to 600 characters, and characters like people or animals are projected speaking on the right half of the screen.
Depending on the character, it can be a bit scary, but it is a unique service like no other.
Features of oddcast
- No mention of commercial use
- Wide variety of speakers
- Character projection feature
Why not try using popular text-to-speech software conveniently?
In this article, we introduced 5 popular text-to-speech services.
The world is very vast, and if you look, there are several other types of text-to-speech software and sites. We will introduce those on another occasion.
Personally, I still recommend Ondoku.
Having an easy-to-read website and understanding how to use it instantly is very important.
Please make sure to add it to your options.
We look forward to seeing you.
■ AI voice synthesis software "Ondoku"
"Ondoku" is an online text-to-speech tool that can be used with no initial costs.
- Supports approximately 50 languages, including Japanese, English, Chinese, Korean, Spanish, French, and German
- Available from both PC and smartphone
- Suitable for business, education, entertainment, etc.
- No installation required, can be used immediately from your browser
- Supports reading from images
To use it, simply enter text or upload a file on the site. A natural-sounding audio file will be generated within seconds. You can use voice synthesis up to 5,000 characters for free, so please give it a try.
Email: ondoku3.com@gmail.com
"Ondoku" is a Text-to-Speech service that anyone can use for free without installation. If you register for free, you can get up to 5000 characters for free each month. Register now for free
