comma.ai, founded by George Hotz in 2015, takes the scrappiest path in the autonomy field. Instead of building a robotaxi or a full self-driving stack, it sells an aftermarket device that runs openpilot, which the company calls “comma’s open source driving assistant that, well, drives your car.” Mounted behind the windshield, the device uses cameras and the car’s own sensors to provide adaptive cruise control and lane-keeping on dozens of existing vehicle models.
openpilot is genuinely open source, and comma has released a stack of supporting libraries to go with it: opendbc for interpreting a car’s CAN bus, panda for the hardware interface, cereal for messaging, and others. The driving itself runs through “a large neural network” whose outputs are turned into steering and acceleration commands by a model-predictive-control planner running as a “closed loop control system running at 100Hz.” A central design constraint is keeping the human responsible: the system continuously checks that the driver remains attentive and ready to take over.
comma.ai matters as the open, community-driven counterpoint to the secretive, capital-intensive majors. By crowd-sourcing driving data from its users and shipping a low-cost add-on, it pursues advanced driver assistance as a consumer product rather than a moonshot.
For a general reader, comma.ai shows that the autonomy spectrum runs from billion-dollar driverless fleets all the way down to a few-hundred-dollar gadget you bolt into your own car, and that meaningful self-driving capability does not have to come from a giant corporation.