CapeSym (formerly known as Cape Simulations) is a company that provides semiconductor and scintillator detector materials, detector modules, and systems for nuclear detection. It offers silicon photomultiplier (SiPM) detectors, standard photomultiplier tube (PMT) detectors, compact PMT detectors, compact spectrometers, developer kits, and sensors. Additionally, the company provides thermal analysis simulation software, as well as materials processing, characterization, and testing services.