Chatterbox TTS vs KittenTTS
Chatterbox TTS
github.comKittenTTS
github.comSide by side
| Figure | Chatterbox TTS | KittenTTS |
|---|---|---|
| Price from | Free | $14.99/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 3 |
| Spec score · Text-to-Speech Software | 9.0 (#9) | 8.8 (#24) |
| Spec score · Text-to-speech tools | 8.9 (#21) | 8.4 (#70) |
| Commercial use | Yes | Yes |
| Export formats | WAV | WAV |
| Intended users | The README describes Turbo for low-latency voice agents and Nano for on-device or CPU inference when memory and latency budgets are tight. | The maker describes use cases including voice agents, customer-support call automation, content creation, and dedicated endpoints. |
| Platforms | linux,macos,self_hosted | windows,macos,linux,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 maker says users can download the weights and self-host, including in a VPC, on-premises, or on-device for enterprise deployments. |
| Support | The README invites users to join the project’s Discord community. | The maker offers commercial integration assistance, custom voice development, enterprise licensing, email support, GitHub Issues, and a Discord community. |
| Voice cloning | Models can generate speech conditioned on a short reference audio clip. | KittenTTS 2 supports zero-shot voice cloning from a short audio sample without fine-tuning. |
| What it does | Chatterbox is Resemble AI’s open-source family of text-to-speech and voice-cloning models. | KittenTTS is an open-source text-to-speech library with a CPU-capable 1.7B-parameter KittenTTS 2 model and lightweight legacy models. |
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.