STAR Cryoelectronics, founded in 1999, is a worldwide leading supplier of ultra-sensitive LTS and HTS SQUID sensors, mating cryocables and PC-based SQUID readout electronics, TES microcalorimeter and STJ X-ray detectors, and cryogen-free ADR cryostats. An extensive range of standard and custom SQUID sensors and packaging options is available for applications in biomedical imaging, non-destructive testing of materials, geophysical exploration, and basic research. The PC-based SQUID control electronics manufactured by STAR Cryoelectronics, marketed under the trade name pcSQUID™, offers unsurpassed flexibility and outstanding performance for single- and multi-channel applications. The easy-to-use control software and modular architecture simplify SQUID sensor operation and integration into application-specific systems. STAR Cryoelectronics also offers extensive custom LTS and HTS thin-film design and foundry services for a wide range of superconducting electronics applications, and is the sole producer of the popular Mr. SQUID® Educational Demonstration System in use at many colleges and universities. In addition, STAR Cryoelectronics now offers turn-key, cryogen-free ADR cryostats with cooling to 50 mK for basic research, as well as TES microcalorimeter spectrometers for X-ray microanalysis and STJ X-ray absorption spectrometers for synchrotron science applications.