School Loop provides online communication systems for K-12 schools in the United States. It offers School Loop, a hosted service that allows teachers to publish assignments, grades, and attendance, as well as parents to get the information they need. The company also provides learning management systems; School Loop Plus, a K-12 website system that includes CMS, multilingual voice messaging, personal portals, digital lockers, calendars, and email applications; and OpenLoop, which enables data sharing between School Loop and other applications. School Loop was founded in 2004 and is based in San Francisco, California.