Attana’s Quartz Crystal Microbalance (QCM) analytical instruments have been developed to study in vitro biological interactions, mimicking the in vivo conditions. Attana’s superior technology for kinetic interaction studies allows to perform different assays, including biochemical, crude, sera, cell, and tissue-based, in vitro diagnostic and material chemistry assays, in real time and label free. With the focus to validate, select, and optimize drug candidates prior to clinical trials, Attana has helped pharmaceutical companies to increase their efficiency and profitability. In addition, the Attana instruments and services have been used in many other applications and research as described in this chapter.