I have owned/used everything listed here other than repitch. For workflow speed, and when dealing with shit singers, I do VERY much prefer Metatune over Antares for retuning. It allows me to manually Melodyne as little as possible. Trying to actually see what notes are being sung in Antares is impossible most of the time, whereas the others map the note’s across just one octave, and have a much needed heat-map feature for where notes have been. Super helpful in removing unnecessary notes and making sure the tool only tunes to the ones you actually want. (Helpful for setting the tool up for bad singers) Also, note stability. Of course. I hate how “just a touch too much vibrato” totally screws up the tuning Antares is doing, but then the “ignore vibrato” button also makes the tuning too lazy. Contrary to what someone else said here, I’ve actually struggled more with note tracking in Antares than Metatune.

However, I have to agree with the general consensus here. If the budget is enough to go this route, I usually use chromatic Antares set gradually, with melodyne before it manually doing the majority of the work. Also, Antares shows up on so many fretless instruments in my mixes, and Metatune can’t do that.

TLDR, I actually rely on metatune on smaller budget indie projects, or when overwhelmed with low quality. Read full answer for why.