In an effort to address the issues related to chemical coagulants, the recent paradigm in wastewater treatment has shifted towards encouraging industries to adopt and implement sustainable solutions in their activities. This study aims to evaluate the polysaccharide and protein contents of five different plant coagulants derived from the leaves of cassava (Manihot esculenta), cow grass (Axonopus compressus), kaduk (Piper sarmentosum), moringa (Moringa oleifera) and petai belalang (Leucaena leucocephala) and compare their coagulation performances in turbidity removal in a kaolin suspension. Jar tests were conducted with varying biocoagulant doses (0–0.1 mg/L) and pH values (4–10). Results showed that moringa had the highest polysaccharide (8.65 ± 0.001g/L) and protein (2.89 ± 0.001 g/L) contents. After moringa, petai belalang had the next-highest polysaccharide content (7.08 ± 0.001 g/L) and kaduk had the next-highest protein content (1.28 ± 0.003 g/L). Under the optimal conditions of a dose ratio of 0.01 and pH of 4, the petai belalang and moringa coagulants achieved the highest turbidity removal rates, which exceeded 90% and 87%, respectively. These promising outcomes may encourage further exploration to examine the appropriate approach for the extraction of active ingredients and the optimal operation parameters.