Chatterbox TTS vs Sprag
Chatterbox TTS
github.comSprag
sprag.aiSide by side
| Figure | Chatterbox TTS | Sprag |
|---|---|---|
| Price from | Free | $0.70/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Web | — | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 9 |
| Spec score · Voice Cloning Software | 9.1 (#1) | 8.3 (#12) |
| Spec score · Text-to-Speech Software | 9.0 (#9) | 8.4 (#75) |
| Spec score · Text-to-speech tools | 8.9 (#21) | 8.6 (#52) |
| Spec score · AI voice cloning tools | 9.0 (#4) | 8.3 (#21) |
| Export formats | WAV | mp3,opus,aac,flac,wav,pcm |
| Free plan | Yes | No |
| Platforms | linux,macos,self_hosted | web,api |
| Product | Chatterbox is a family of open-source text-to-speech models by Resemble AI. | Sprag offers native speech-to-speech agents and an STT-to-LLM-to-TTS voice pipeline through one API. |
| Self-hosting | Chatterbox is run locally and does not require an account when installed from the open-source project, according to an independent technical guide. | The homepage links to a self-hosted deployment option. |
| Support | The README invites users to join the project’s Discord community. | The pricing page directs users with questions about account costs, billing, rate limits, enterprise agreements, and metering to contact Sprag. |
| Voice cloning | Models can generate speech conditioned on a short reference audio clip. | Yes |
Plans
Chatterbox TTS
- Chatterbox open-source modelsFree
- Voice AI Research (Chatterbox)Free
Sprag
- Chorus$0.70 a month
- Chorus Design$15 a month
- Chorus Clone$4.50 a month
- Symphony NotesFree
- Rhythm$0.08, paid once
- Symphony$0.09, paid once
- Chorus — built-in voice$0.70, paid once
- Chorus — cloned voice$4.50, paid once
- Chorus — designed voice$15, paid once
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.