Segmentation by type distinguishes the technological foundations that underpin allergen detection across all applications. Immunoassays, including ELISA, chemiluminescent, and lateral flow formats, dominate the landscape owing to their validated sensitivity, specificity, and scalability, representing the bulk of adoption across food, pharma, and cosmetics. Molecular techniques, principally real‑time PCR and next‑generation sequencing, serve niche but high‑value niches where DNA‑based allergen identification is mandated, especially in processed foods with hidden protein fragments. Cell‑based assays, such as basophil activation tests, are confined to clinical diagnostics, offering functional insight into patient‑specific IgE responses, albeit at higher operational cost. Emerging platforms, encompassing biosensors and microfluidic chips, are still nascent but projected to gain traction as they promise reduced assay time and point‑of‑care capability. Each type contributes distinct cost structures and performance characteristics, influencing overall market composition and guiding investment priorities within the broader Allergen Testing taxonomy.