Host Cell Residual DNA Detection segmentation by type classifies the market into quantitative PCR (qPCR), digital PCR (dPCR), hybridization‑based assays, and next‑generation sequencing (NGS). qPCR remains the dominant technique, covering roughly 55 % of market revenue, because its established workflow, moderate cost per sample, and regulatory acceptance enable large‑scale lot release testing. dPCR, accounting for about 20 % of spend, offers absolute quantification and superior sensitivity, which is increasingly demanded for low‑dose gene‑therapy vectors and cell‑therapy batches. Hybridization‑based assays, such as Southern blot and microarray platforms, represent near 15 % of the market; they are favored when fragment size distribution and integrity assessment are required, despite longer turnaround times. NGS, still emerging, holds roughly 10 % of the market share, driven by its capacity to characterize complex residual‑DNA profiles and to meet stringent safety thresholds in advanced therapies. The relative contribution of each type reflects trade‑offs between analytical performance, throughput, and cost, thereby defining the overall market taxonomy for Host Cell Residual DNA Detection.