When we got started ten years ago, the annual AUVSI student drone competition was dominated by commercial autopilots, such as Piccolo. Now it's almost entirely open source autopilots, led by ArduPilot (14 of top 20) and Dronecode/PX4 (3 of top twenty). I'm super proud of this having co-founded ArduPilot and now leading Dronecode. Only one commercial autopilot in top twenty -- next year they will be gone entirely!
From sUAS News: