StandBy is a Rotterdam based scale-up developing a detection system for facility services, business communication and workplace safety. StandBy detects the presence of people and devices in buildings and areas. StandBy uses a combination of different technologies:Wi-Fi, Cell Phone masts, GPS and Bluetooth low Energy (BLE) beacons. The use of these technologies determines which people or devices are present at a location and where they are on the premises. This enables the development of software based tools for mobile that provide 21st century solutions to 21st century challenges for medium and large companies in terms of safety, hospitality and reachability.