OpenUtau is an open source editing environment for UTAU community with modern user experience.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Mac
- Windows
- Linux
- Arch Linux


The best open source alternative to VOCALOID is OpenUTAU. If that doesn't suit you, our users have ranked more than 10 alternatives to VOCALOID and four of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to VOCALOID are Cadencii, Sinsy and eCantorix.
OpenUtau is an open source editing environment for UTAU community with modern user experience.


Cadencii is a program that allows cross-importation of vocal MIDI, VSQ, UST, and VSQX files. It supports both UTAU and Vocaloid voice banks.


Cross-platform, gratis, and of course, libre and open source.