UTAU was clunky. is modern, open-source, and 100% free. You can download hundreds of free voicebanks (like Namine Ritsu and Matsudappoiyo ) specifically designed for this engine.

True Vocaloid voicebanks that are completely free are rare, but they do exist. These run on the official Yamaha Vocaloid Editor (which you usually have to buy), but the voice libraries themselves are free.

Searching for a used to be a fool's errand. Today, thanks to "Lite" editions and open-source alternatives, it is entirely possible to produce professional-quality vocal tracks with zero budget.

You have just used a free vocal synth that rivals paid Vocaloids.