​Porous Organic Polymers (POPs) have emerged as promising next-generation heterogeneous catalysts for both thermal and photocatalytic applications. Their tunable porosity, high surface area, and customizable chemical functionality enable precise control over active sites, facilitating efficient interactions with reactants. The covalent backbone of POPs imparts exceptional thermal and chemical stability, making them suitable for demanding catalytic processes. In thermal catalysis, POPs have demonstrated superior performance in reactions such as hydrogenation, oxidation, and dehydrogenation. Meanwhile, their ability to incorporate photoactive units—such as conjugated linkers, chromophores, or metal complexes—positions them as versatile platforms for photocatalytic applications, including CO₂ reduction, organic transformations, and environmental remediation. The modular design of POPs allows for systematic optimization of catalytic performance, opening pathways toward scalable, sustainable catalysis for green chemistry and energy conversion technologies.