Side by side
Kyutai TTS vs Piper
Both stand on text-to-speech software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APIiPhoneLinux+4
Choose Kyutai TTS if you want free, open-source speech generation, particularly Pocket TTS for CPU use or TTS 1.6B for streaming applications. Look elsewhere if your Pocket TTS workflow depends on creating pauses by inserting silence in the input text.
Visit Kyutai TTS
Free plan APILinuxSelf-hosted+1
Piper offers multiple ways to integrate local text-to-speech and a broad language list at no listed cost. Its non-commercial-use restriction is important to check before adopting it.
Visit PiperThe facts
| Kyutai TTS | Piper | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, iPhone, Linux, Mac, Self-hosted, Web, Windows | API, Linux, Self-hosted, Web |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 2 | 1 |
| Maker | Kyutai TTS | Not published |
| Website | kyutai.org | github.com |
| On text-to-speech software | #33 of 223 | #52 of 223 |
Kyutai TTS: what it does well
- Free, open-source models, with Pocket TTS under the MIT license.
- Pocket TTS is designed for real-time CPU use.
- Seven languages are listed for Pocket TTS.
- Offers voice cloning, API access, and WAV export.
- Browser demo works without installation.
What to know first
- Pocket TTS requires Python 3.10–3.14 and PyTorch 2.5 or later.
- Adding pauses with silence in Pocket TTS input text is unsupported.
Piper: what it does well
- Supports 44 languages.
- Offers command-line, web server, Python and C/C++ interfaces.
- Exports WAV audio.
- Instructions for training new voices are linked.
- Free plan is listed as free.
What to know first
- Commercial use is marked No.
- WAV is the only listed export format.
- The README says maintainers are being sought.
Alternatives to Kyutai TTS Alternatives to Piper The whole list