QATCH develops tools that make viscosity measurable and predictable early in biologics development. Our core platform, nanovisQ®, is a microfluidic quartz viscometer that delivers full shear-rate viscosity profiles from only 4 µL, eliminating the material and throughput barriers that delay viscosity testing. Building on this capability, we created visQ.AI, an on-premise, formulation-aware machine learning engine trained on large microliter-scale datasets. Together, nanovisQ and visQ.AI address a major bottleneck in high-concentration biologics: viscosity is often measured too late, requires large material quantities, and slows subcutaneous formulation decisions. Our integrated platform enables rapid testing, few-shot prediction, and earlier manufacturability insight.