If budget is a concern, consider reputable free plugins like MeldaProduction MAutoPitch Auburn Sounds Graillon Guide to Using Auto-Tune EFX (Current Version)
Auto-Tune EFX 3 is a popular audio processing plugin developed by Antares Audio Technologies. It's widely used in the music production industry for correcting pitch issues in vocal recordings and for creating distinctive vocal effects. The plugin offers a range of features, including a simple interface, automatic pitch correction, and a humanized function to make corrected vocals sound more natural.