The website shared by you is built using WPBakery Page Builder. The Visual Composer Website Builder: https://visualcomposer.com/ and WPBakery Page Builder: https://wpbakery.com/ are two independent products. Having said that, one can’t be replaced by another.
You can find more info here: https://visualcomposer.com/docs/faq/visual-composer-website-builder-vs-wpbakery-page-builder/

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