Single-cell RNA sequencing (scRNA-seq) is a powerful method that is widely used in biomedical research. It is extensively used to determine cell composition of complex tissues, identify rare cell types, map heterogeneity at single cell level and identify paired, full-length immunoglobulin sequence and T-cell receptor α/β. Advancements in high-throughput single-cell RNA sequencing technologies, in combination with powerful computational tools, has made scRNA-seq a widely used technology across a broad spectrum of therapeutic areas such as oncology, immunology, neuroscience and developmental biology. Requirement of live cells for most single cell workflows is a bottleneck that limits its wider usage. Advent of 10x genomics Flex protocol has enabled single cell gene expression profiling using fixed samples including FFPE samples. This offers several advantages compared to conventional single cell workflows.