Yes, Manucurist US is a legitimate company. It is a non-toxic nail polish brand made in France. The brand offers botanical, vegan formulas that deliver salon-like color, shine, and long-lasting results. It has been featured in trendy publications like Women's Health, Bustle, and Who What Wear. The brand has a strong following and positive customer reviews. However, some customers have reported that the polish does not last as long as salon manicures.