Vigil Neuroscience is a healthcare company that is developing a non-invasive device for the treatment of Alzheimer's disease. The company was founded in 2018 by Dr. Doug Watt, a neuroscientist and entrepreneur. The device, called the Vigil System, uses a combination of light and sound to stimulate the brain and improve cognitive function. The Vigil System is currently in clinical trials and has shown promising results in improving memory and reducing symptoms of Alzheimer's disease. Vigil Neuroscience is based in Palo Alto, California.