What it does
Core capabilities at a glance
- Text TO Speech
- TTS
- Voice Clone
- Zero Shot TTS
Deep dive
The full breakdown - performance, comparisons, and setup
OpenVoice
OpenVoice is a speech (TTS/STT) tool - Instant voice cloning by MIT and MyShell. Audio foundation model.
Overview
1. Accurate Tone Color Cloning. OpenVoice can accurately clone the reference tone color and generate speech in multiple languages and accents.
2. Flexible Voice Style Control. OpenVoice enables granular control over voice styles, such as emotion and accent, as well as other style parameters including rhythm, pauses, and intonation.
3. Zero-shot Cross-lingual Voice Cloning. Neither of the language of the generated speech nor the language of the reference speech needs to be presented in the massive-speaker multi-lingual training dataset.
1. Better Audio Quality. OpenVoice V2 adopts a different training strategy that delivers better audio quality.
2. Native Multi-lingual Support. English, Spanish, French, Chinese, Japanese and Korean are natively supported in OpenVoice V2.
3. Free Commercial Use. Starting from April 2024, both V2 and V1 are released under MIT License. Free for commercial use.
OpenVoice has been powering the instant voice cloning capability of myshell.ai since May 2023. Until Nov 2023, the voice cloning model has been used tens of millions of times by users worldwide, and witnessed the explosive user growth on the platform.
Please see QA for common questions and answers. We will regularly update the question and answer list.
OpenVoice V1 and V2 are MIT Licensed. Free for both commercial and research use.
OpenVoice is open-source, written primarily in Python, with 37,831 GitHub stars under the MIT license. It was last updated on 2025-04-19.
Key capabilities
From the project's documentation:
- Zengyi Qin at MIT
- Wenliang Zhao at Tsinghua University
- Xumin Yu at Tsinghua University
- Ethan Sun at MyShell
How it fits a local-AI stack
OpenVoice runs on your own hardware, so pair it with a model and a GPU sized to your needs. Use the VRAM calculator to pick a model that fits your card, and see what you can run for hardware guidance. Related speech (TTS/STT) tools in the directory:
Sources
- Source code & docs: myshell-ai/OpenVoice
- Official website: https://research.myshell.ai/open-voice
Stats from GitHub, 2026-10-10.
Frequently asked
Quick answers to common questions
What is OpenVoice?
OpenVoice is a tts-stt tool for local AI workloads. Instant voice cloning by MIT and MyShell. Audio foundation model.
Is OpenVoice free and open source?
Yes, OpenVoice has 37,831 GitHub stars and is licensed under MIT. You can self-host it for free on .
What hardware do I need for OpenVoice?
The hardware requirements depend on which models you run. Check our hardware directory for compatible GPUs and systems. OpenVoice has 37,831 GitHub stars and an active community.
Does OpenVoice support GPU acceleration?
OpenVoice's GPU support depends on your specific setup. Check the documentation for details. For the best performance, pair it with an NVIDIA RTX 4090 or 5090.
What are the best alternatives to OpenVoice?
Popular alternatives include other tts-stt tools in our directory. Browse our full collection at /tool for comparisons, community reviews, and benchmark data to find the right fit for your workflow.
How much does OpenVoice cost?
OpenVoice is free-open-source. It is completely free and open source to self-host.
Pairs well with
Complementary tools, models, and hardware