The most trusted and
beloved ADAS used by
thousands
Enjoy upgraded functions of Adaptive Cruise Control (ACC), Automated Lane Centering (ALC), Forward Collision Warning (FCW), and Lane Departure Warning (LDW) for a growing variety of supported car makes, models, and model years, with camera-based Driver Monitoring (DM) feature alerts distracted and asleep drivers.
Open-source transparency, safety constraints, and community trust
GitHub 
Plentiful features, just for you
Designed for customization, transparency, and driver empowerment.
Modular Assisted Driving System (MADS)
Decouple lateral control (steering) from longitudinal control (gas/brake), enabling the car to steer itself even when cruise control is disengaged.
Enhanced Speed Control
Cruise speed adjustments using the vision model, OpenStreetMap (OSM) data, and/or Speed Limit Assist (SLA).
Pivotal Developer Metrics
Real-time environment and vehicle data to diagnose performance.
Enhanced Automatic Lane Changes
Customizable lane changes via blinker or steering nudge, featuring obstacle prevention through Blind Spot Monitoring (BSM) for safer merges.
Driving Model Selector
Switch between legacy and new driving models, available in sunnypilot UI and sunnylink remote management dashboard.
sunnylink Integration
Manage Your comma Device From Anywhere. Secure, remote access to your sunnypilot device with a premium, real-time dashboard.
Comprehensive Documentation
Explore our detailed guides and resources to unlock the full potential with sunnypilot.
How It Works
Get up and running in 6 simple steps.
Supported Device
Get a comma four from the comma.ai shop.
Software Setup
Enter the custom software URL on your device. Follow the guide for the Recommended Branch.
Recommended BranchPair with sunnylink
Pair your comma device with sunnylink to unlock the full potential sunnypilot settings.
Visit sunnylinkDrive Chill
Start driving and enjoy the upgraded experience.
Loved by Drivers
Join the community of chill drivers.
"I love that it’s open source! The opportunity to contribute to something I believe in is so important to me in today’s society when OSS is becoming less common. Besides that, of course I love all the features. It makes for a much better experience than OP."
"I feel that having it engaged is actually an added layer of safety. I feel it’s made me more aware in the instances when I’m not using it as well. I’ve always been a great driver, but I think it’s made me an even better driver."
"Even before the device arrived, I spent a lot of time reading sunnypilot documentation... It gave me a lot of confidence in the system, and after installation, I’ve really appreciated how feature-rich, flexible, and user-friendly sunnypilot is. So far, my total distance driven with sunnypilot is 61,853 km (38,433 miles), and I use it every single day..."
"I have FSD and comma. I like the open community and great communication the comma has. Everytime FSD updates I fear for my life, with suunypilot people are able to adjust the style of driving to what they want."
"My other favourite features in SP are Display brightness setting (Auto (Dark) in particular) - without it my C3X was too bright at night... Model switcher... Settings backup... MADS"
"I get carsick very easily, so smooth longitudinal control is extra important to me… and that’s where I tend to focus most of my effort with OpenPilot."