Types segmentation classifies catalysts by their physicochemical nature and operational mode. Heterogeneous catalysts—including metal oxides (e.g., NiMo, CoMo) and zeolitic frameworks—are the workhorses of the market, offering robustness, ease of separation, and reusability; they dominate the spend because they align with continuous‑flow hydroprocessing and cracking units. Homogeneous catalysts, typically strong acids or bases dissolved in the reaction medium, enable precise control over esterification and transesterification reactions but incur higher handling and regeneration costs, limiting their market share to niche, batch‑oriented operations. Bifunctional catalysts combine acidic and metallic sites within a single material, bridging the gap between deoxygenation and cracking steps and attracting interest for integrated processes; their emerging status reflects ongoing R&D investment. Nanostructured catalysts—such as supported nanoparticles or core‑shell architectures—promise enhanced activity and selectivity, yet remain a small, high‑growth segment as commercial scale‑up challenges persist. Each type’s contribution to market size is proportional to its suitability for the prevailing application, feedstock variability, and regulatory environment.