This comprehensive review explores the impact of incorporating metakaolin and alccofine as supplementary cementitious materials (SCMs) in blended concrete. This study presents the effect of the inclusion of metakaolin and alccofine on both fresh and hardened state properties of concrete, as mentioned by various researchers. In the realm of fresh concrete, the review explores the influence of metakaolin and alccofine on workability, setting time, and bleeding, offering insights into the intricate interplay between these SCMs and the overall mix design. Furthermore, the paper discusses the potential enhancements in rheological properties, such as viscosity and flow characteristics, brought about by including these additives. The review encompasses an in-depth examination of the effects of metakaolin and alccofine on compressive strength, tensile strength, and flexural strength. It also explores the implications for durability aspects, including resistance to acid and alkali-silica reactions. The microstructural changes induced by these additives, as observed through techniques like scanning electron microscopy (SEM), are highlighted to provide a comprehensive understanding of the evolution of the concrete matrix.