“According to the latest industry research, about 90 percent of drugs that reach clinical stage development never make it to FDA approval and commercialisation; the same applies to diagnostic markers.” One crucial point is that usually, in the early stage of drug development and biomarker identification, reliable data can only be obtained in artificial, extremely well-defined environments (purified binding partners, no complex biological matrices). However, the data obtained in this way did not take the native environment into account delivering false positive or false negative results. For that reason, the development and identification of new drugs and biomarkers takes a long time, and patients cannot be helped. Thanks to an innovative, proprietary particle-based approach using the physical effect of Whispering Gallery Modes (WGM), Surflay Nanotec GmbH is able to overcome most of these limitations. Our WGM system “WhisperSense” will allow a direct, real-time and spatially well-resolved interaction and concentration determination in cell cultures. Furthermore, direct full kinetic characterisation in the natural environment will be possible for cell culture microfluidic chips (organ-on-a-chip).