SPKL (Speckle Health) is a Tampa, Florida medical device startup developing wearable optical sensors that measure blood flow and tissue perfusion non-invasively. Its technology, Integrated Diffuse Speckle Contrast Spectroscopy (IDSCS), shines safe levels of coherent near-infrared light into tissue and analyzes fluctuations in the reflected light caused by moving red blood cells to quantify perfusion rates continuously. The company's lead application is emergency stroke assessment and triage in the field, ahead of hospital imaging. The device is designed to be low-cost, low-power and 'plug-and-measure', and the underlying platform is adaptable to other tissue perfusion applications.