Can I use a pressure-mounted baby gate at the top of stairs?

The strong consensus across parenting communities and child-safety guidance is no — pressure-mounted gates can dislodge under impact and are intended for doorways or the bottom of stairs. For the top of stairs, hardware-mounted (screwed into studs) gates are recommended. Most of the pressure-mounted picks below explicitly note 'bottom of stairs' in their own product copy for this reason.