
Voice & audio
Tortoise TTS
High-quality text-to-speech, known for its realistic voices.
★ 15k
November 2024
Apache-2.0
Voice & audio
What it does
Tortoise TTS is a classic voice synthesis model renowned for its high-quality, natural-sounding output, though it generates speech slower than some alternatives. It's a top choice for projects where vocal fidelity is paramount.
Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.
Screenshots & visuals

Before you start
- Setup difficultySome setup needed
- Command lineRequired
- API keyNot required
- Sends data onlineNo
Judged automatically from the project's own metadata. Always confirm on the official page.
Tortoise TTS FAQ
- Is Tortoise TTS free?
- Yes. It runs on your own machine, so there is no usage-based cost either.
- Do I need to install anything or write code to use Tortoise TTS?
- This is a library meant to be used from code. It is not a standalone app.
- Does Tortoise TTS work on a phone?
- No. It needs a computer.
- Can I use Tortoise TTS commercially?
- The licence is Apache-2.0, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.
How it compares
The conditions that decide whether you can actually use it, side by side.
| Tool | Command line | API key | Sends data out | Phone | Commercial use |
|---|---|---|---|---|---|
| Tortoise TTS (this page) | Required | Not needed | No | No | Yes |
| Whisper | Required | Not needed | No | No | Yes |
| Real-Time-Voice-Cloning | Required | Not needed | Yes | No | Not verified |
| whisper.cpp | Required | Not needed | No | No | Yes |
"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.