Comma

A device and AI software that adds autopilot capabilities to everyday cars. Hands free driving for the car you already have. Openpilot is an open-source advanced driver assistance system developed by comma.ai that adds automated lane centering, adaptive cruise control, and other features to compatible vehicles. It enables the car to handle steering and speed for extended periods while requiring driver supervision. You need a comma four device (the current hardware), which mounts on the windshield, connects to your car's OBD-II port via a harness, and uses built-in cameras and compute to run the software. Openpilot officially supports over 325 models across 27 brands, including many recent Toyota, Hyundai, Kia, Honda, Ford, and others. Newer Hyundai and Toyota models often perform especially well. Check the official compatibility list at comma.ai/vehicles for your exact year and trim. It functions as a Level 2 system (hands-off steering and speed control in many scenarios) but always requires active driver attention and readiness to take over, similar to factory systems like Tesla Autopilot or GM Super Cruise. Many users report that openpilot feels smoother, more natural, and capable on a wider range of roads than stock systems, especially for lane centering and handling faded lines or curves, though it varies by vehicle and software version. There is no subscription fee. The system works offline for core driving features, though internet is needed for over-the-air updates, initial setup, and optional data upload to improve the models.