Meet Kastle Systems, the Covid-Era Kings of Back-to-Work Data (Correct)

Like most that season, the April 2020 meeting between building security company Kastle Systems Inc. and its largest client started on a grim note. Coronavirus cases were rising, and cities were shutting down. As hospitals filled up, office buildings, which account for about 60% of Kastle’s revenue, were emptying out. The client, a real estate developer based in Washington, DC, wanted to know what they could do to keep the people inside their properties safer.

The thing was, barely anybody was inside anymore. Kastle knew this because the company was monitoring them: Besides physical security, the company provides building-access swipe cards to ...