Audio
MOSS-TTSD
Multilingual long-form dialogue speech with zero-shot voice cloning.
★ 1.4k starsApache-2.0
View guide →IndexTTS: industrial-level, controllable zero-shot text-to-speech with voice cloning
index-tts is an open-source audio project by index-tts (index-tts/index-tts on GitHub). It has 24,364 GitHub stars and 2,890 forks, is released under the NOASSERTION license, and was last updated on GitHub on 29 September 2026.
Decide what you want to achieve with index-tts and check the README on GitHub for requirements before installing.
Clone the repository from GitHub (or take the packaged install route in step 3 if the README offers one).
Follow the project's documented install commands — the Run section below lists the exact ones — and add any required API keys or models.
Work through the README's quickstart example end to end, then adapt it to your own project or data.
Synthesize a speaker's voice from a reference clip without per-speaker training.
IndexTTS-2 adds fine-grained control (including emotional expression) beyond plain cloning.
The Python API examples cover multilingual generation with language selection.
Multiple released versions (2.5 and 2) let you trade quality, speed and features.
Run the bundled web demo for quick tests, or integrate through the Python API.
Documented vLLM serving path for higher-throughput deployment.
Get the IndexTTS source.
git clone https://github.com/index-tts/index-tts.git
cd index-ttsInstall uv and the project dependencies as in the README's 'Install Dependencies' step, then download the IndexTTS-2.5 or IndexTTS-2 models.
pip install -U uv
# then follow README steps 2-3 for dependency install and model downloadStart the bundled web UI for your chosen model version and synthesize speech from a reference clip.
# see the README 'Web Demo' commands for IndexTTS-2.5 (default) or IndexTTS-2index-tts is maintained by the index-tts organization/account on GitHub, together with open-source contributors, in the public repository index-tts/index-tts.
Yes — the code is open source under the NOASSERTION license. Check the repository's LICENSE file for the exact terms before commercial use.
No API key — models are downloadable and run locally; you need a suitable GPU for reasonable speed, and rights to any voice you clone.
All three are open zero-shot TTS systems; IndexTTS positions itself on industrial-grade controllability (emotion, duration) and an actively versioned model zoo.
Clone the repository from GitHub, follow the install commands in the Run section (taken from the project's README), and complete the documented quickstart example before adapting it to your own use case.
Multilingual long-form dialogue speech with zero-shot voice cloning.
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CosyVoice: multilingual voice generation with zero-shot cloning, streaming and fine-tuning
The most-starred other Audio projects in the LibreAI catalogue — the realistic shortlist if index-tts is not the right fit.
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Robust Speech Recognition via Large-Scale Weak Supervision
1 min voice data can also be used to train a good TTS model! (few shot voice cloning)
Clone a voice from 5 seconds of audio and generate arbitrary speech in real time
Port of OpenAI's Whisper model in C/C++
Free and open — grab the source, star the repo, and start creating.