Abstract The most economical and conservative treatment of partially edentulous condition is removable partial denture (RPD). Esthetics plays a salient function in determining the outcome of the prosthesis. The objective of accomplishing acceptable esthetics and preserving the inherent quality of a denture i.e., retention, stability, support and protecting the remaining teeth and underline tissue, is a challenging task. Display of the traditional clasp assemblies and framework made of different metals and alloys like base metal cobalt chromium alloy (Co–Cr), noble metal gold and its alloy, stainless steel, and titanium disrupts the esthetics, because its exhibition antagonizes with patient’s confidentiality about prosthesis. This review article describes the two non-metallic materials Acetal resin and PEEK as alternatives clasp materials.