The company's meteoric rise in the early 2010s was accompanied by safety concerns. Uber, along with other ride-hailing companies like Lyft and the now-defunct Sidecar, fought state-based efforts to require background checks for drivers — a battle they eventually lost. Uber and Lyft now do continuous background checks on drivers. They have also rolled out other safety features such as easy access to 911 and have teased that others are on the way. Uber has even tested recording audio of trips to enhance security.