Chatterbox TTS vs Festival Speech Synthesis System
Chatterbox TTS
github.comFestival Speech Synthesis System
cstr.ed.ac.ukSide by side
| Figure | Chatterbox TTS | Festival Speech Synthesis System |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 1 |
| Spec score · Text-to-Speech Software | 9.0 (#9) | 8.5 (#53) |
| Spec score · Text-to-speech tools | 8.9 (#21) | 8.1 (#94) |
| Commercial use | Yes | Yes |
| Free plan | Yes | Yes |
| Languages | The README lists 23 supported languages for Chatterbox Multilingual. | The site lists British and American English, Spanish, and Welsh text-to-speech, and says English is the most advanced. |
| License | The code and model listing identify the project as MIT licensed, permitting modification and redistribution subject to the license notice. | Festival and the speech tools use an X11-type license that allows commercial and non-commercial use. |
| Platforms | linux,macos,self_hosted | The download page requires a Unix-like environment and gives Linux, FreeBSD, OSX, and Cygwin under Windows as examples. |
| Support | The README invites users to join the project’s Discord community. | The project page links to Festival related mailing lists hosted by FestVox. |
Plans
Chatterbox TTS
- Chatterbox open-source modelsFree
- Voice AI Research (Chatterbox)Free
In their own words
Chatterbox TTS
Chatterbox TTS is a family of open-source text-to-speech models from Resemble AI. Its listed choices include Turbo, Nano, Multilingual V3, and dedicated single-language models. Turbo supports tags that can prompt reactions such as sighs, gasps, coughs, and laughter; Nano is intended for on-device or CPU use when memory and latency budgets are tight. The README lists 23 languages for Multilingual. The project supports voice cloning, audio input, batch processing, voice isolation, and WAV export. Generated audio carries Resemble AI’s PerTh watermark. The repository is MIT licensed, and its listed plan costs nothing for research and development. Resemble says it has stopped offering voice generation as a commercial product, while its models remain open and free for research and development. The README provides pip and source installation instructions and describes Python 3.11 on Debian 11, with CUDA, CPU, and MPS device options. Listed platforms are Linux, macOS, and self-hosted.
Festival Speech Synthesis System
Festival Speech Synthesis System has no write-up on Specifiction yet; its figures are above.