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OpenUtau vs Synthesizer V Studio: catalog facts
OpenUtau	Synthesizer V Studio
Free Free and open source under the MIT licence.	Paid Paid software with voice databases sold separately; free trials are available.
Windows	Windows, macOS
Open-source successor to UTAU Works with the UTAU voicebank ecosystem	Voices built from licensed recordings of real singers Large and regularly expanded catalogue of voice databases
Requires voicebanks and some setup before first use Documentation lives mainly in the GitHub wiki	Paid software, with voices bought separately Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.