The identification and enumeration of probiotic multi-strain blends are essential for ensuring product quality, efficacy, and regulatory compliance. Various technologies and methods can be employed to identify and quantify the specific strains within these blends. Cultural plate count and biochemical/phenotypic identification – the respective “traditional” methods for enumeration and identification of probiotics – underperform when applied to biotic multi-strain blends due to poor specificity, decreased accuracy, increased variability, and time to result. Molecular identification techniques, such as Polymerase Chain Reaction (PCR), offer highly specific and reliable identification by targeting unique DNA sequences of each strain. The use of Next Generation Sequencing (NGS) for applications such as shotgun metagenomic DNA sequencing can be incorporated into standard laboratory testing operations to quickly and effectively identify individual biotic species in a blend.  Enumeration methods, such as plate count methods (Colony Forming Units - CFU), remain the gold standard for quantifying viable bacteria but numerous challenges exist with these techniques. Solutions including quantitative PCR (qPCR) and digital PCR (dPCR) are particularly effective for strain-specific identification and enumeration in multi-strain blends. Flow cytometry is another application that can differentiate between viable and non-viable cells using fluorescent dyes, providing rapid and detailed analysis of the physiological state of the bacteria. Advances in flow cytometry using techniques such as fluorescence in-situ hybridization or antibody tagging have incorporated species-specificity into the viability evaluation.  Advances in biotic identification and enumeration methods can now provide a comprehensive understanding of probiotic blends, enhancing quality control and supporting the development of effective probiotic products.